| UNITED STATES |
| Band
GHz |
Government
Allocation(s) |
Government Allocation(s)
by Footnote |
Government Usage |
Planned Usage |
| 10- 10.025 |
RADIOLOCATION
US58 US108 S5.479
G32 |
Meteorological-Satellite
S5.479 |
Military Radars. Used extensively for military tactical
and training in the use of its various radar systems.
Some RDT&E of radars systems is done in this band.
This band is used for inland waterways
radionavigational aids. Some agencies use this band
to assist in surveying and mapping operations.
WXD Satellite. NOAA meteorological satellite radar
operates in this band. |
No changes are planned.
Use expected to continue. |
| 10.025-
10.45 |
RADIOLOCATION
US58 US108 G32 |
None |
Military Radars. Used primarily by the military in the
operation of and in the tactical and training of various
Doppler radars- fixed, mobile, and transportable.
Also used for RDT&E of new radar systems. |
No changes are planned.
Use expected to continue. |
| 10.45- 10.5 |
RADIOLOCATION
US58 US108 G32 |
None |
Military Radars. Used primarily by the military in the
operation of and in the tactical and training of various
Doppler radars- fixed, mobile, and transportable.
Also used for RDT&E of new radar systems. |
No changes are planned.
Use expected to continue. |
| 10.5- 10.55 |
RADIOLOCATION
US59 |
None |
Doppler Radars. Used primarily for traffic control
speed guns and intrusion detection radars. |
No changes are planned.
Use expected to continue. |
| 10.55- 10.6 |
None |
None |
None |
No changes are planned. |
| 10.6- 10.68 |
EARTH EXPLORATION-SATELLITE (passive)
SPACE RESEARCH
(passive)
US265 US277 |
RADIO ASTRONOMY
US277 |
Radio Astronomy. Continuum observations in this
band allow cosmic microwave background studies.
Earth Exploration. Satellite passive remote sensing
studies of rain, snow, lake ice, sea topography, etc.,
is done in this band. Passive sensor instruments
include AMSR, AMSR-E,AMSR-SMR, TMI. |
Scientific research is
expected to continue and
increase in this band. |
| 10.68- 10.7 |
EARTH EXPLORATION-
SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US74 US246 |
None |
Radio Astronomy. Continuum observations in this
band allow cosmic microwave background studies.
Earth Exploration. Satellite passive remote sensing
studies of rain, snow, lake ice, sea topography, etc.,
is done in this band. Passive sensor instruments
include AMSR, AMSR-E,AMSR-SMR, TMI. |
Scientific research is
expected to continue and
increase in this band. |
| 10.7- 11.7 |
None
US211 |
None |
Earth Stations. In this band, some Federal agencies
hold commercial satellite leases for common carrier
service provided by a private sector domestic satellite
system. These Federal agencies operate Earth
stations that receive voice, data, and video signals.
Experimental. Experimental testing is performed in
this band for such studies as millimeter wave
propagation studies, etc. |
Use expected to increase. |
| 11.7- 12.2 |
None
S5.486 S5.488 |
Fixed S5.486 |
Earth Stations. In this band, some Federal agencies
hold commercial satellite leases for common carrier
service provided by a private sector domestic satellite
system. These Federal agencies operate Earth
stations that transmit voice, data, and video signals.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to continue. |
| 12.2- 12.7 |
None
S5.488 S5.490 |
None |
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars.
Experimental. Experimental test stations on national
and military test ranges operate in this band. |
Use expected to continue. |
| 12.7- 12.75 |
None |
None |
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars.
Experimental. Experimental test stations on national
and military test ranges operate in this band. |
Use expected to continue. |
| 12.75- 13.25 |
None
US251 |
Space Research
US251 |
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars.
Experimental. Experimental test stations on national
and military test ranges operate in this band. |
No changes are planned.
Use expected to continue. |
| 13.25- 13.4 |
EARTH EXPLORATION-SATELLITE (active)
AERONAUTICAL RADIONAVIGATION S5.497
SPACE RESEARCH
(active)
S5.498A |
None |
Aero-Radionav. Airborne Doppler navigational
radars operate in this band.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars.
NASA. NASA operates active remote sensors in this
band.
|
No changes are planned.
Use expected to continue. |
| 13.4- 13.75 |
RADIOLOCATION
US110 G59
EARTH EXPLORATION-SATELLITE (active)
SPACE RESEARCH
(active) US5.501A
Standard Frequency and
Time Signal-Satellite
(Earth-to-space)
US5.501B |
None |
Military Radars. The military services operate
shipborne radiolocation point defense weapon
systems that include search radars, tracking radars,
and missile & gunfire control radars.
Space Research. NASA, in this band, participates in
a joint venture with the ESA on space-based
observations and measurements of surface
topography, soil moisture, etc. (NASA
TOPEXPoseidon Mission).
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars.
TDRSS. NASA operates the TDRS System in the
13.4-14.05 GHz band. Links supported include
forward links to the Shuttle and other mission
spacecraft and downlinks to White Sands, NM.
NASA. NASA operates active remote sensors in this
band. |
Use expected to continue. |
| 13.75- 14 |
RADIOLOCATION
US110 G59
Standard Frequency and
Time Signal-Satellite
(Earth-to-space)
Space Research
S5.333 S5.502 S5.503
S5.503A US337 |
Earth Exploration-Satellite S5.333 |
Earth Exploration. This band supports NASA
operations:
NASA mission to Planet Earth tropical rainfall
measuring mission (TRMM).
Passive remote sensing studies of rain, snow,
geodetic studies, etc.
TDRSS. NASA operates the TDRS System in the
13.4-14.05 GHz band. Links supported include
forward links to the Shuttle and other mission
spacecraft and downlinks to White Sands, NM.
NASA Deep Space. Uplinks and downlinks tofrom
NASA planetary spacecraft conducting radio science
experiments as well as exchanging some command
and ranging data. Mission is to investigate the Titan
moon of the planet Saturn. Supports surface imaging
and topographic mapping of Titan.
Experimental. The military services perform RDT&E
of new radar systems, techniques, tactics, etc., in this
band.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to continue. |
| 14- 14.2 |
RADIONAVIGATION
US292
Space Research
|
None |
Data Uplinks. Satellite uplinks for the transmissions
of meteorological information as part of the
automated weather distribution system (SAWDS).
Earth Stations. In this band, some commercial
satellite leases are held by Federal agencies (uplinks)
for common carrier service provided by a private
sector domestic satellite system. These Federal
agencies operate Earth stations that transmit voice,
data, and video signals.
Space Research. NASA operates the SURFSAT-1
spacecraft VLBI phase downlinks.
TDRSS. NASA operates the TDRS System in the
13.4-14.05 GHz band. Links supported include
forward links to the Shuttle and other mission
spacecraft and downlinks to White Sands, NM.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars.
Experimental. Experimental RDT&E of radar
systems are done in this band. |
No changes are planned.
Use expected to increase. |
| 14.2- 14.25 |
None |
None |
Aero-Radionav. The FAA operates airport surface
detection radars to monitor aircraft and vehicles on
the ground.
ATC Comm. The FAA operates satellite uplinks
supporting ATC communications with Mexican air
traffic controllers.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
Use expected to continue. |
| 14.25- 14.3 |
None |
None |
Uplink. DOE operates an uplink supporting the
National Technological University Network and
Educational Satellite System.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
Use expected to continue. |
| 14.3- 14.4 |
None |
None |
Earth Stations. In this band, some commercial
satellite leases are held by Federal agencies (uplinks)
for common carrier service provided by a private
sector domestic satellite system. These Federal
agencies operate Earth stations that transmit voice,
data, and video signals.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
Use expected to increase. |
| 14.4- 14.47 |
Fixed
Mobile |
None |
Point-to-Point. This band is used predominately by
fixed, mobile, and transportable telemetry microwave
systems that transmit communications in addition to
other ATC video links, CCTV, range test data, etc.
Mobile uses include airborne downlink data
transmissions.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to continue. |
| 14.47- 14.50 |
Fixed
Mobile
S5.149 US203 |
Radio Astronomy
US203 |
Point-to-Point. Fixed and mobile microwave
systems operate extensively in this band for various
purposes that transmit video, audio, and data. Some
uses are at the various national and military test
ranges.
Research. NASA conducts extensive research and
studies where they engage in ground-to-ground
transmission of digital data, digital audio, and digital
data to and from water mobile telemetry and precision
tracking vans.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. This band is
one of radio astronomy's lines of greatest importance
below 275 GHz for spectral-line observations. |
No changes are planned.
Use expected to continue. |
| 14.5-
14.7145 |
FIXED
Mobile
Space Research |
None |
Point-to-Point. Fixed and mobile microwave
systems operate extensively in this band for various
purposes that transmit video, audio, and data. Some
uses include the support of various national and
military test range operations, transmission of air
traffic control radar video, power management.
Fixed and Mobile. The military operates fixed,
mobile, and maritime mobile air-to-air and air-to-ground datalinks in this band (common data link).
TDRSS. NASA GSO Tracking and Data Relay
Satellite System (TDRSS) single access uplinks use
this band.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to increase. |
| 14.7145-
15.1365 |
MOBILE
Fixed
Space Research
US310
|
None |
Point-to-Point. Fixed and mobile microwave
systems operate extensively in this band for various
purposes that transmit video, audio, and data. Some
uses include the support of various national and
military test range operations and the transmission of
air traffic control radar video.
Fixed and Mobile. The military operates fixed,
mobile, and maritime mobile air-to-air and air-to-ground datalinks in this band (common data link).
TDRSS. NASA GSO Tracking and Data Relay
Satellite System (TDRSS) single access uplinks use
this band.
Research. Space-to-space link for the NASA Earth
Observing System AM (EOS-AM) space research
station.
Experimental. RDT&E of various systems and
millimeter wave technology is performed in this band.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to increase. |
| 15.1365-
15.2 |
FIXED
Mobile
Space Research
US211 |
|
Point-to-Point. Fixed and mobile microwave
systems operate extensively in this band for various
purposes that transmit video, audio, and data.
Fixed and Mobile. The military operates fixed,
mobile, and maritime mobile air-to-air and air-to-ground datalinks in this band (common data link).
TDRSS. NASA GSO Tracking and Data Relay
Satellite System (TDRSS) single access uplinks use
this band.
Research. NASA conducts extensive research and
studies where they engage in ground-to-ground
transmission of digital data, digital audio, and digital
data to and from water mobile telemetry and precision
tracking vans.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to increase. |
| 15.2- 15.35 |
FIXED
Mobile
Space Research
US211 S5.339 |
Space Research
(passive) S5.339
Earth Exploration-Satellite (passive)
S5.339 |
Point-to-Point. Fixed and mobile microwave
systems operate extensively in this band for various
purposes that transmit video, audio, and data. Some
uses include the support of various national and
military test range operations, transmission of air
traffic control radar video, and power management.
Fixed and Mobile. The military operates fixed,
mobile, and maritime mobile air-to-air and air-to-ground datalinks in this band (common data link).
TDRSS. NASA GSO Tracking and Data Relay
Satellite System (TDRSS) single access uplinks use
this band.
Space Research. NASA operates spacecraft VLBI
phase uplinks.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to increase. |
| 15.35- 15.4 |
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US74 US246 |
None |
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars.
Earth Exploration. Passive remote sensing studies
of rain, water vapor, etc., can be done in this band. |
Scientific research is
expected to continue and
increase in this band. |
| 15.4- 15.43 |
AERONAUTICAL
RADIONAVIGATION
US260 US211 |
None |
Aero-Radionav. This band is used primarily for
mobile or transportable tactical aircraft landing
systems- shore and shipborne.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to continue. |
| 15.43- 15.63 |
AERONAUTICAL
RADIONAVIGATION
US260 US211 |
None |
Aero-Radionav. This band is used primarily for
mobile or transportable tactical aircraft landing
systems- shore and shipborne.
NASA Aero-Radionav. NASA operates the space
shuttle microwave scanning beam landing system in
support of the STS.
Airborne WXD Radars. Aircraft weather radars
operate in this band.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to continue. |
| 15.63- 15.7 |
AERONAUTICAL
RADIONAVIGATION
US260 US211 |
None |
Aero-Radionav. This band is primarily used
throughout the United States for the FAA's airport
surface detection equipment.
Tactical Aero-Radionav. The military services
employ transportable aircraft microwave landing
systems in this band.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to continue. |
| 15.7- 16.6 |
RADIOLOCATION
US110 G59 |
None |
Aero-Radionav. This band is primarily used
throughout the United States for the FAA's airport
surface detection equipment.
Airborne Military Radars. The military services
employ various airborne radars for such functions
such as terrain following, forward looking radars, etc.
Radio Astronomy. Spectral-line observations are
performed in the band 12- 16 GHz for the study of
the formaldehyde line and of quasars. |
No changes are planned.
Use expected to continue. |
| 16.6- 17.1 |
RADIOLOCATION
Space Research (Deep
Space) (Earth-to-space)
US110 G59 |
None |
Airborne Military Radars. The military services
employ various airborne radars for such functions
such as terrain following, forward looking radars, etc.
Experimental. This band supports RDT&E of
experimental radars, test range missile guidance
radars, and target tracking radars. |
No changes are planned.
Use expected to continue. |
| 17.1- 17.2 |
RADIOLOCATION
US110 G59 |
None |
Experimental. Various radar RDT&E activities are
supported in this band. |
No changes are planned.
Use expected to continue. |
| 17.2- 17.3 |
RADIOLOCATION
EARTH EXPLORATION-SATELLITE (active)
SPACE RESEARCH
(active)
US110 G59 |
None |
Earth Exploration. This band can be used to
conduct vegetation and snow studies in the EES and
SR active microwave services.
Experimental. Experimental testing and calibrations
of sensor and navigational systems is performed in
this band. |
No changes are planned.
Use expected to continue. |
| 17.3- 17.7 |
Radiolocation
US259 US271 G59 |
None |
Experimental. Experimental testing and calibrations
of sensor and navigational systems is performed in
this band. Also, this band supports RDT&E of
experimental radars. |
On 1 Apr 07, the BSS will
have co-primary allocation
with the FSS in the U.S.
for non-government use
(WARC-92). Military
radars may have to
reaccommodated in
another band.
Use expected to continue. |
| 17.7- 17.8 |
None
US271 |
None |
None |
Per IB Dkt 98- 172, FCC
plans to reallocate 17.7-
18.3 GHz exclusively
primary for the fixed
service. Other services
secondary. |
| 17.8- 18.1 |
None
S5.519 US334 G117 |
FIXED-SATELLITE
(space-to-Earth)
US334 |
Military SATCOM. Federal government fixed-satellite
and mobile-satellite services is limited in this band to
the military services (see G117). |
Per IB Dkt 98- 172, FCC
plans to reallocate 17.7-
18.3 GHz exclusively
primary for the fixed
service. Other services
secondary. |
| 18.1- 18.3 |
None
S5.519 US334 G117 |
FIXED-SATELLITE
(space-to-Earth)
US334
METEOROLOGICAL-SATELLITE S5.519 |
Military SATCOM. Federal government fixed-satellite
and mobile-satellite services is limited in this band to
the military services (see G117).
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
Per IB Dkt 98- 172, FCC
plans to reallocate 17.7-
18.3 GHz exclusively
primary for the fixed
service. Other services
secondary. |
| 18.3- 18.6 |
None
S5.519 US334 G117 |
FIXED-SATELLITE
(space-to-Earth)
US334 |
Military SATCOM. Federal government fixed-satellite
and mobile-satellite services is limited in this band to
the military services (see G117).
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
Per IB Dkt 98- 172, FCC
plans to reallocate 18.3-
18.55 GHz exclusively
primary for the GSOFSS.
Other services secondary. |
| 18.6- 18.8 |
EARTH EXPLORATION-SATELLITE (passive)
SPACE RESEARCH
(passive)
US254 US255 US334
G117 |
FIXED-SATELLITE
(space-to-Earth)
US334 |
Military SATCOM. Federal government fixed-satellite
and mobile-satellite services is limited in this band to
the military services (see G117).
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies.
Earth Exploration. Band is used for passive remote
sensing of rain, sea state, ocean ice, and water
vapor. |
Per IB Dkt 98- 172, FCC
plans to reallocate 18.55-
18.8 GHz exclusively
primary for the GSOFSS
and fixed service. Other
services secondary.
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
change to implement
footnote S5.522A. |
| 18.8- 19.7 |
None
US334 G117
|
FIXED-SATELLITE
(space-to-Earth)
US334 |
Military SATCOM. Federal government fixed-satellite
and mobile-satellite services is limited in this band to
the military services (see G117).
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
Per IB Dkt 98- 172, FCC
plans to reallocate 18.8-
19.3 GHz and 19.3- 19.7
GHz exclusively primary
for the NGSOFSS; and
MSSFL & fixed service,
respectively. Other
services secondary. |
| 19.7- 20.1 |
None
US334 G117
|
FIXED-SATELLITE
(space-to-Earth)
US334 |
Military SATCOM. Federal government fixed-satellite
and mobile-satellite services is limited in this band to
the military services (see G117).
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
Per IB Dkt 98- 172, FCC
plans to reallocate 19.7-
20.2 GHz exclusively
primary for the GSOFSS
and fixed service. Other
services secondary. |
| 20.1- 20.2 |
None
US334 G117
|
FIXED-SATELLITE
(space-to-Earth)
US334 |
Military SATCOM. Federal government fixed-satellite
and mobile-satellite services is limited in this band to
the military services (see G117).
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
Per IB Dkt 98- 172, FCC
plans to reallocate 19.7-
20.2 GHz exclusively
primary for the GSOFSS
and fixed service. Other
services secondary. |
| 20.2- 21.2 |
FIXED-SATELLITE
(space-to-Earth)
MOBILE-SATELLITE
(space-to-Earth)
Standard Frequency and
Time Signal-Satellite
(space-to-Earth)
G117 |
None |
Military SATCOM. Military EHF satellite
communications systems (GSO ) is supported in this
band. Federal government fixed-satellite and
mobile-satellite services is limited in this band to the
military services (see G117).
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 21.2- 21.4 |
EARTH EXPLORATION-SATELLITE (passive)
FIXED
MOBILE
SPACE RESEARCH
(passive)
US263 |
None |
Point-to-Point. This band is extensively used for low
density microwave radiocommunications links for
voice, data, and video at various government
laboratories, test ranges, and air traffic control
facilities.
Earth Exploration. Passive remote sensing studies
of water vapor, rain, etc., is done in this band.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 21.4- 22 |
FIXED
MOBILE |
None |
Point-to-Point. This band is extensively used for
fixed and mobile low-density microwave
radiocommunications links for voice, data, and video
at various government laboratories, test ranges, and
air traffic control facilities.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 22- 22.21 |
FIXED
MOBILE except
aeronautical mobile
S5.149 |
None |
Point-to-Point. This band is extensively used for low
density microwave radiocommunications links for
voice, data, and video at various government facilities
and laboratories, test ranges, and air traffic control
facilities.
Radio Astronomy. NASA supports radio astronomy
observations in the 22.01-22.5 GHz band with its
deep space station receivers. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 22.21- 22.5 |
EARTH EXPLORATION-SATELLITE (passive)
FIXED
MOBILE except
aeronautical mobile
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
S5.149 US263 |
None |
Point-to-Point. This band is extensively used for
fixed and mobile low density microwave
radiocommunications links for voice, data, and video
at various government facilities and laboratories, test
ranges, and air traffic control facilities
Radio Astronomy. NASA supports radio astronomy
observations in the 22.01-22.5 GHz band with its
deep space station receivers. In addition,
observations of redshifted H20 line (22.235GHz) are
performed in this band.
Earth Exploration. Some Earth Exploration-satellites
study and measure water vapor line. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 22.5- 22.55 |
FIXED
MOBILE
US211 |
None |
Point-to-Point. This band is extensively used for
low density microwave radiocommunications links for
voice, data, and video at various government facilities
and laboratories, test ranges, and air traffic control
facilities. |
No changes are planned.
Use expected to continue. |
| 22.55- 22.81 |
FIXED
INTER-SATELLITE
MOBILE
S5.149 US278 |
None |
Point-to-Point. This band is extensively used for
fixed and mobile low density microwave
radiocommunications links for voice, data, and video
at various government facilities and laboratories, test
ranges, and air traffic control facilities.
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 22.55-23.55
GHz band to provide forward links to Earth orbiting
spacecraft. |
No changes are planned.
Use expected to continue. |
| 22.81- 22.86 |
FIXED
INTER-SATELLITE
MOBILE
S5.149 US278 |
None |
Point-to-Point. This band is extensively used for low
density microwave radiocommunications links for
voice, data, and video at various government facilities
and laboratories, test ranges, and air traffic control
facilities.
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 22.55-23.55
GHz band to provide forward links to Earth orbiting
spacecraft.
Research. NASA supports radio astronomy
observations in the 22.81-22.86 GHz band with its
deep space station receiver.
Radio Astronomy. Observations of ammonia line
and two lines of methyl formate are performed in this
band that help deduce the temperature of interstellar
mediums and concentrations of molecular hydrogen
(H2). |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 22.86- 23 |
FIXED
INTER-SATELLITE
MOBILE
S5.149 US278 |
None |
Point-to-Point. This band is extensively used for low
density microwave radiocommunications links for
voice, data, and video at various government facilities
and laboratories, test ranges, and air traffic control
facilities.
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 22.55-23.55
GHz band to provide forward links to Earth orbiting
spacecraft.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 23- 23.07 |
FIXED
INTER-SATELLITE
MOBILE
S5.149 US278 |
None |
Point-to-Point. This band is extensively used for
fixed and mobile low density microwave
radiocommunications links for voice, data, and video
at various government facilities and laboratories, test
ranges, and air traffic control facilities.
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 22.55-23.55
GHz band to provide forward links to Earth orbiting
spacecraft.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 23.07- 23.12 |
FIXED
INTER-SATELLITE
MOBILE
S5.149 US278 |
None |
Point-to-Point. This band is extensively used for
fixed and mobile low density microwave
radiocommunications links for voice, data, and video
at various government facilities and laboratories, test
ranges, and air traffic control facilities.
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 22.55-23.55
GHz band to provide forward links to Earth orbiting
spacecraft.
Research. NASA supports radio astronomy
observations in the 23.07-23.12 GHz band with its
deep space station receiver.
Radio Astronomy. Observations of 3 major
ammonia lines are performed in this band that help
deduce the temperature of interstellar mediums. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 23.12- 23.55 |
FIXED
INTER-SATELLITE
MOBILE
S5.149 US278 |
None |
Point-to-Point. This band is extensively used for
fixed and mobile low density microwave
radiocommunications links for voice, data, and video
at various government facilities and laboratories, test
ranges, and air traffic control facilities.
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 22.55-23.55
GHz band to provide forward links to Earth orbiting
spacecraft.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 23.55- 23.6 |
FIXED
MOBILE |
None |
Point-to-Point. This band is extensively used for low
density microwave radiocommunications links for
voice, data, and video at various government
facilities, laboratories, and test ranges.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 23.6- 24 |
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US74 US246 |
None |
Aero-Radionav. The FAA operates airport surface
detection equipment in this band.
Earth Exploration. NASA conducts passive remote
sensing studies of water vapor, rain, etc., in this band.
Research. NASA supports radio astronomy
observations in the 23.6- 24 GHz band with its deep
space station receiver.
Radio Astronomy. Observations of 3 major
ammonia lines are performed in this band that help
deduce the temperature of interstellar mediums. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 24- 24.05 |
None
S5.150 US211 |
ISM S5.150 |
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies.
ISM. The band 24-24.25 GHz (center frequency
24.125 GHz) is designated for industrial, scientific and
medical (ISM) applications. |
No changes are planned.
Scientific research is
expected to continue and
increase in this band. |
| 24.05- 24.25 |
RADIOLOCATION
Earth Exploration-Satellite
(active)
S5.150 US110 G59 |
ISM S5.150 |
Doppler Speed Guns. Federal agencies operate
radar speed guns in this band for vehicular speed
control.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies.
Earth Exploration. Remote sensing studies of water
vapor, rain, etc., is done in this band.
ISM. The band 24-24.25 GHz (center frequency
24.125 GHz) is designated for industrial, scientific
and medical (ISM) applications. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 24.25- 24.45 |
None
US341 |
None |
Experimental. Experimental testing and calibrations
of sensor and navigational systems is performed in
this band.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
This band was reallocated
by the FCC to the Fixed
Service to accommodate
relocation of the DEMS
Service from 18.82- 19.92
GHz and 19.16- 19.26
GHz to the 24.25- 24.45
GHz and 25.05- 25.25
GHz bands. |
| 24.45- 24.65 |
INTER-SATELLITE
RADIONAVIGATION
S5.533 |
None |
Experimental. Experimental testing of
radiocommunications systems is conducted in this
band.
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 24.65- 24.75 |
INTER-SATELLITE
RADIOLOCATION-SATELLITE (Earth-to-space) |
None |
Radio Astronomy. Observations are made in the
band 18.2-25.2 GHz for continuum measurements
and spectral-line studies. |
No changes are planned.
Scientific research is
expected to continue and
increase in this band. |
| 24.75- 25.05 |
RADIONAVIGATION |
None |
Experimental. Experimental testing and calibrations
of sensor and navigational systems is performed in
this band.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 25.05- 25.25 |
None |
None |
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
This band was reallocated
by the FCC to the Fixed
Service to accommodate
relocation of the DEMS
Service from 18.82- 19.92
GHz and 19.16- 19.26
GHz to the 24.25- 24.45
GHz and 25.05- 25.25
GHz bands. |
| 25.25- 25.5 |
FIXED
INTER-SATELLITE
MOBILE
Standard Frequency and
Time Signal-Satellite
(Earth-to-space)
S5.533 |
None |
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 25.25-27.5
GHz band to provide return links to Earth orbiting
spacecraft.
Proximity Ops. NASA also uses the band
25.25-27.5 GHz for proximity link communications
between orbiting spacecraft.
Experimental. Experimental testing and calibrations
of sensor and navigational systems is performed in
this band.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
Possible future band for
flight test telemetry.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 25.5- 27 |
FIXED
INTER-SATELLITE
S5.536
MOBILE
EARTH EXPLORATION-SATELLITE (space-to-Earth) S5.536A
MOBILE
Standard Frequency and
Time Signal-Satellite
(Earth-to-space) |
None |
Point-to-Point. This band is used for low density
microwave radiocommunications links for voice, data,
and video at government laboratories and test ranges.
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 25.25-27.5
GHz band to provide return links to Earth orbiting
spacecraft.
Proximity Ops. NASA also uses the band
25.25-27.5 GHz for proximity link communications
between orbiting spacecraft.
Earth Exploration. The 25.5-27 GHz band is
planned to be used for very wideband data return
from spaceborne sensors.
Experimental. Experimental testing and calibrations
of sensor and navigational systems is performed in
this band.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
Possible future band for
flight test telemetry.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 27- 27.5 |
FIXED
INTER-SATELLITE
MOBILE S5.536
S5.533 |
None |
Intersatellite Links. NASA operates the TDRS
constellation data relay satellites in the 25.25-27.5
GHz band to provide return links to Earth orbiting
spacecraft.
Proximity Ops. NASA also uses the band
25.25-27.5 GHz for proximity link communications
between orbiting spacecraft.
Experimental. Experimental testing of
radiocommunications systems such as the
demonstration of millimeter wave radio links.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 27.5- 29.5 |
None |
None |
Experimental. Other Federal agencies are
conducting experimental research on millimeter wave
propagation.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 29.5- 30 |
None |
None |
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 30- 31 |
FIXED-SATELLITE
(Earth-to-space)
MOBILE-SATELLITE
(Earth-to-space)
Standard Frequency and
Time Signal-Satellite
(space-to-Earth)
G117 |
None |
Military SATCOM. In this band, the DOD operates
uplinks to GSO and NGSO satellites for global voice
and data communications. Also, space telecommand
of SATCOMs are done in this band.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 31- 31.2 |
Standard Frequency and
Time Signal-Satellite
(space-to-Earth)
S5.149 US211 |
None |
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. Additional radio astronomy
observations are made in the band 25-35 GHz for
continuum measurements and spectral-line studies. |
No changes are planned.
Scientific research is
expected to continue and
increase in this band. |
| 31.2- 31.3 |
Standard Frequency and
Time Signal-Satellite
(space-to-Earth)
S5.149 US211 |
None |
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. Additional radio astronomy
observations are made in the band 25-35 GHz for
continuum measurements and spectral-line studies. |
No changes are planned.
Scientific research is
expected to continue and
increase in this band. |
| 31.3- 31.8 |
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US74 US246 |
None |
Earth Exploration. Passive remote sensing of
terrestrial cloud water and precipitation, oil spills, and
ocean ice is done in this band.
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. Additional radio astronomy
observations are made in the band 25-35 GHz for
continuum measurements and spectral-line studies. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 31.8- 32 |
RADIONAVIGATION
S5.548 US69 US211
US262 |
SPACE RESEARCH
(deep space) (space-to-Earth) US262 |
Military Radars. Military airborne precision ground
mapping radars operate in this band.
NASA Deep Space. Transmissions in this band
support the NASA Mars Global Surveyor spacecraft
conducting radio science experiments as well as
exchanging some command and ranging data.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
WRC-97 added a fixed
service allocation to the
band 31.8- 33.4 GHz and
identified it via RR
S5.547, as available for
use by high-density
systems. WRC-97 chose
to delay until 2001
implementation of the
allocation via RR S5.547A
and Resolution 126 (COM
5- 11).
Use expected to continue. |
| 32- 32.3 |
INTER-SATELLITE
RADIONAVIGATION
S5.548 US69 US278
US262 |
SPACE RESEARCH
(deep space) (space-to-Earth) US262 |
NASA Deep Space. Transmissions in this band
support the NASA Mars Global Surveyor spacecrafts,
and other deep space probes that are conducting
radio science experiments as well as exchanging
some command and ranging data.
Radionav. The Navy operates an automatic aircraft
carrier landing system in this band.
NASA Downlinks. Further, this band supports a
downlink from the NASA SURFSAT-1 (NGSO).
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
FCC deleted non-govt
allocation for the
radionavigation service
(see AH 212- 69).
Use expected to continue. |
| 32.3- 33 |
INTER-SATELLITE
RADIONAVIGATION
S5.548 US69 US278
US262 |
None |
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
WRC-97 added a fixed
service allocation to the
band 31.8- 33.4 GHz and
identified it via RR
S5.547, as available for
use by high-density
systems. WRC-97 chose
to delay until 2001
implementation of the
allocation via RR S5.547A
and Resolution 126 (COM
5- 11). |
| 33- 33.4 |
RADIONAVIGATION
US69 |
None |
Radionav. The Navy operates an automatic aircraft
carrier landing system in this band.
Experimental. DOD RDT&E is conducted in this
band to evaluate millimeter wave systems as well as
the accuracy of sensor and navigational systems.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
WRC-97 added a fixed
service allocation to the
band 31.8- 33.4 GHz and
identified it via RR
S5.547, as available for
use by high-density
systems. WRC-97 chose
to delay until 2001
implementation of the
allocation via RR S5.547A
and Resolution 126 (COM
5- 11).
Use expected to continue. |
| 33.4- 34.2 |
RADIOLOCATION
US110 US252 G34 |
None |
Experimental. DOD RDT&E is conducted in this
band to evaluate new imaging radar systems as well
as the accuracy of sensor and navigational systems.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 34.2- 34.4 |
RADIOLOCATION
US110
SPACE RESEARCH
(deep space) (Earth-to-space)
US262 G34 |
None |
NASA Deep Space. This band supports uplinks and
downlinks tofrom the NASA Cassini spacecraft that
is conducting radio science experiments as well as
exchanging some command and ranging data.
Mission is to investigate the Titan moon of the planet
Saturn.
Radars. NASA is also operating an experimental
Doppler radar tracking system (34.2-34.7 GHz) in this
band.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 34.4- 34.5 |
RADIOLOCATION
US110
SPACE RESEARCH
(deep space) (Earth-to-space)
US262 G34 |
None |
NASA Deep Space. Deep space command and
control communications to Earth-launched vehicles is
conducted by NASA in this band.
Radars. NASA is operating an experimental Doppler
radar tracking system (34.2-34.7 GHz) and
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
No changes are planned.
Use expected to continue. |
| 34.5- 34.7 |
RADIOLOCATION
US110
SPACE RESEARCH
(deep space) (Earth-to-space)
US262 G34 |
None |
Military Radars. Military services in this band are
operating vehicle speed guns, cloud height measuring
radars as well as experimental research in radar
techniques.
NASA Deep Space. Deep space command and
control communications to Earth-launched vehicles is
conducted by NASA in this band.
Radars. NASA is operating an experimental Doppler
radar tracking system (34.2-34.7 GHz) and
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 34.7- 35.5 |
RADIOLOCATION
US110 G34
|
None |
Military Radars. This band is used extensively for
fixed and mobile radars supporting operational and
experimental requirements. Military uses include
employment of airborne side-looking radars, the
experimental research of radars and radar
techniques, and improving on the accuracy of sensor
and navigational systems.
Radars. Non-military applications include the NASA
scientific investigation of aircraft vortices using
radiolocation techniques, mobile cloud height
measuring radars, and speed guns.
Experimental Research. Research is being
conducted for airborne enhanced vision systems.
Radio Astronomy. Observations are made in the
band 25-35 GHz for continuum measurements and
spectral-line studies. Radio astronomy observations
are made in this band because this is the first radio
window (31.2- 37.5 GHz) in the millimeter wave
region and also it provides studies of continuum
spectrum of galactic and extragalactic objects. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 35.5- 35.6 |
RADIOLOCATION
EARTH EXPLORATION-SATELLITE (active)
SPACE RESEARCH
(active)
US110 G34 |
None |
Passive Sensing. Remote sensing of snow is done
in this band.
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. |
No changes are planned.
Scientific research is
expected to continue and
increase in this band. |
| 35.6- 36 |
RADIOLOCATION
EARTH EXPLORATION-SATELLITE (active)
SPACE RESEARCH
(active)
US110 G34 |
None |
Radars. NASA conducts scientific investigations of
aircraft vortices using radiolocation techniques.
Testing of radar technology and antennas is done in
this band.
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 36- 36.43 |
EARTH EXPLORATION-SATELLITE (passive)
FIXED
MOBILE
SPACE RESEARCH
(passive)
S5.149 US263 |
None |
Earth Exploration. NASA conducts surface (land
and water) mapping throughout the United States in
this band.
Passive Sensing. Passive remote sensing studies of
terrestrial water vapor, rain, snow, ocean ice, oil spills,
clouds, etc., is done in this band.
Experimental. Experimental testing by some
Federal agencies is conducted in this band towards
improving the accuracy of sensor and navigational
systems.
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 36.43- 36.5 |
EARTH EXPLORATION-SATELLITE (passive)
FIXED
MOBILE
SPACE RESEARCH
(passive)
S5.149 US263 |
None |
Passive Sensing. Passive remote sensing of
terrestrial cloud water and precipitation is done in this
band.
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. |
No changes are planned.
Scientific research is
expected to continue and
increase in this band. |
| 36.5- 37 |
EARTH EXPLORATION-SATELLITE (passive)
FIXED
MOBILE
SPACE RESEARCH
(passive)
S5.149 US263 |
None |
Point-to-Point. Fixed microwave systems operate in
military test ranges.
Passive Sensing. Passive remote sensing studies of
terrestrial water vapor, rain, snow, ocean ice, oil spills,
clouds, etc., is done in this band.
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. |
No changes are planned.
Use expected to continue.
Scientific research is
expected to continue and
increase in this band. |
| 37- 38 |
FIXED
MOBILE
SPACE RESEARCH
(space-to-Earth) |
None |
Point-to-Point. On national and military test ranges,
microwave systems support RDT&E activities as well
as serve as range data links. This band is used
extensively by the military services in the RDT&E of
fixed and mobile theater deployable communications
systems.
SPACE RESEARCH. NASA plans to use this band
for future manned exploration of the solar system and
for wideband data return links to the very long
baseline interferometer (VLBI).
Experimental. Further, experimental testing is
conducted in this band towards improving the
accuracy of sensor and navigational systems.
Radio Astronomy. Observations are made in this
band because this is the first radio window (31.2-
37.5 GHz) in the millimeter wave region and also it
provides studies of continuum spectrum of galactic
and extragalactic objects. |
FSS (space-to-Earth)
allocation was added at
37.6- 38.6 GHz by the
FCC (see IB Dkt 97- 95).
Use expected to continue. |
| 38- 38.6 |
FIXED
MOBILE
|
None |
Experimental. NASA conducts experimental
research in this band for improving techniques for
measuring rainfall. |
FSS (space-to-Earth)
allocation added at 37.6-
38.6 GHz by the FCC (see
IB Dkt 97- 95).
Use expected to continue. |
| 38.6- 39.5 |
None
US291 |
None |
Point-to-Point. This band is used by the military
services in the RDT&E of fixed and mobile theater
deployable communications systems.
Experimental. Experimental testing is conducted in
this band towards improving the accuracy of sensor
and navigational systems. |
The 38.6- 40 GHz band was
auctioned on Apr 11, 2000.
Use expected to continue. |
| 39.5- 40 |
FIXED-SATELLITE
(space-to-Earth)
MOBILE-SATELLITE
(space-to-Earth)
US291 G117 |
None |
NONE |
The 38.6- 40 GHz band was
auctioned on Apr 11, 2000.
NATO Joint Freq
Agreemnt identifies 39.5-
40.5 GHz for future military
FSS and MSS rqmt for
SATCOM downlinks.
Paired with 50.4- 51.4
GHz. |
| 40- 40.5 |
EARTH EXPLORATION-SATELLITE (Earth-to-space)
FIXED-SATELLITE
(space-to-Earth)
MOBILE-SATELLITE
(space-to-Earth)
SPACE RESEARCH
(Earth-to-space)
Earth Exploration-Satellite
(space-to-Earth)
G117 |
None |
Manned Exploration. NASA is making plans to use
this band for future manned exploration of the solar
system. |
Licensed millimeter wave
service (ET Docket No.
95- 183), WTB pt 101.
NATO Joint Freq
Agreement identifies 39.5-
40.5 GHz for future military
FSS and MSS rqmt for
SATCOM downlinks.
Paired with 50.4- 51.4
GHz. |
| 40.5- 42.5 |
None
US211 |
None |
Radio Astronomy. Observations are made in this
band for this band encompassing the vibrational
transitions of the silicon monoxide line used to detect
maser emissions from regions of mature-to-late type
stars. |
The Fixed-Satellite (space-to-Earth) and Mobile-Satellite (space-to-Earth)
allocations are planned. |
| 42.5- 43.5 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE except
aeronautical mobile
RADIO ASTRONOMY
S5.149 |
None |
Research. NASA supports radio astronomy
observations in this band with its deep space station
receiver.
Radio Astronomy. Observations are made in this
band for this band encompassing the vibrational
transitions of the silicon monoxide line used to detect
maser emissions from regions of mature-to-late type
stars. |
This band now allocated
for exclusive government
use (See IB Dkt 97- 95.
See also the 47.2- 48.2
GHz band).
Expansion of Federal
SATCOM and fixed and
mobile ops is planned. |
| 43.5- 45.5 |
FIXED-SATELLITE
(Earth-to-space)
MOBILE-SATELLITE
(Earth-to-space)
G117 |
None |
Military SATCOM. This band is used extensively by
the DOD for EHF Satellite Communications System
(GSO) uplinks. |
No changes are planned.
Use expected to continue.
NATO Joint Freq
Agreemnt identifies 43.5-
45.5 GHz as essential
military MSS rqmt for
SATCOM uplinks. |
| 45.5- 47 |
MOBILE
MOBILE-SATELLITE
(Earth-to-space)
RADIONAVIGATION
RADIONAVIGATION-
SATELLITE
S5.554 |
None |
Mobile Telemetry. Mobile telemetering system
operates in this band. |
Under IB Dkt 97- 95, the
FCC plans to add Fixed
service (Primary) at 46.9-
47 GHz.
Use expected to continue. |
| 47- 47.2 |
None |
None |
None |
No changes are planned. |
| 47.2- 48.2 |
None |
None |
None |
NTIA proposed and FCC
reallocated this band for
exclusive non-government
use (See IB Dkt 97- 95.
See also 42.5- 43.2 GHz
band).
Global Stratospheric
Telecommunications
Service (47.2- 47.5 GHz
and 47.9- 48.2 GHz), ET
Doc # 94- 124.
Licensed Millimeter Wave
Service: ET Doc # 95-
183 (FCC 94- 273).
Unlicensed Vehicular
Radar Sys: ET Doc # 95-
183
|
| 48.2- 48.94 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
MOD S5.149 S5.555
US264 US297 |
None |
None |
Global Stratospheric
Telecommunications
Service (47.2- 47.5 GHz
and 47.9- 48.2 GHz), ET
Doc # 94- 124.
Licensed Millimeter Wave
Service: ET Doc # 95-
183 (FCC 94- 273).
Unlicensed Vehicular
Radar Sys: ET Doc # 95-
183 |
| 48.94- 49.04 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
MOD S5.149 S5.555
US264 US297 |
RADIO ASTRONOMY
S5.555 |
Research. NASA supports radio astronomy
observations in this band with its deep space station
receiver.
Radio Astronomy. This band is useful for radio
astronomy observations of the carbon monosulphide
(CS) line and its isotopes. This line is extremely
important for it is used as a diagnostic for the
molecular material in other galaxies and active nuclei
and starburst galaxies. |
No changes are planned.
Scientific research is
expected to continue and
increase in this band. |
| 49.04- 50.2 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
MOD S5.149 US264
US297 |
None |
Experimental. RDT&E activities involving radar
cross section measurements is performed in the
50-55 GHz band. |
No changes are planned.
Use expected to continue. |
| 50.2- 50.4 |
EARTH EXPLORATION-SATELLITE (passive)
FIXED
MOBILE
SPACE RESEARCH
(passive)
US263 |
None |
Passive Sensing. Remote sensing used to measure
atmospheric temperature profiles via oxygen
absorption band.
Experimental. RDT&E activities involving radar
cross section measurements is performed in the
50-55 GHz band. |
WRC-97 modified this
band as follows and U.S.
implementation is pending:
Fixed and mobile services
are deleted to protect
passive operations. Use
expected to continue. |
| 50.4- 51.4 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
MOBILE-SATELLITE
(Earth-to-space)
G117 |
None |
Passive Sensing. Remote sensing used to measure
atmospheric temperature profiles via oxygen
absorption band.
Experimental. RDT&E activities involving radar
cross section measurements is performed in the
50-55 GHz band. |
Scientific research is
expected to continue and
increase in this band.
NATO Joint Freq
Agreemnt identifies 50.4-
51.4 GHz for future military
FSS and MSS rqmt for
SATCOM uplinks. Paired
with 39.5- 40.5 GHz. |
| 51.4- 54.25 |
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US246 |
None |
Passive Sensing. Remote sensing used to measure
atmospheric temperature profiles via oxygen
absorption band.
Experimental. RDT&E activities involving radar
cross section measurements is performed in the
50-55 GHz band. |
WRC-97 modified this
band as follows and U.S.
implementation is pending:
Passive services are
deleted from the 51.4-
52.6 GHz band and fixed
mobile, and inter-satellite
services are added. |
| 54.25- 58.2 |
EARTH EXPLORATION-SATELLITE (passive)
FIXED
INTER-SATELLITE
MOBILE
SPACE RESEARCH
(passive)
US263 S5.558 |
None |
Passive Sensing. Remote sensing used to measure
atmospheric temperature profiles via oxygen
absorption band is done in this band.
Research. Experiment research of atmospheric
anomalies on millimeter wave frequencies is done in
this band.
Experimental. RDT&E activities involving radar
cross section measurements is performed in the
50-55 GHz band. |
WRC-97 modified and
U.S. approval is pending:
Fixed and mobile services
are deleted from the
54.25- 55.58 GHz portion
to protect passive
operations. Additionally,
ISS allocations at 54.25-
59.3 GHz, excluding 56.9-
57 GHz, are limited to
GSO-to-GSO comms with
a PFD limit.
Awaiting IRAC approval of
AH 206 recommended
implementation of ITU
footnotes S5.556 and
S5.557. |
| 58.2- 59 |
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US246 |
None |
Passive Sensing. Remote sensing used to
measure atmospheric temperature profiles via oxygen
absorption band is done in this band. |
Allocations planned for
fixed and mobile services.
Use expected to continue. |
| 59- 61 |
FIXED
INTER-SATELLITE
MOBILE
RADIOLOCATION
S5.558 S5.559 |
None |
Point-to-Point. Fixed microwave links on various
military test ranges support RDT&E activities.
Passive Sensing. Remote sensing used to measure
atmospheric temperature profiles via oxygen
absorption band is done in the band 50-59.3 GHz.
Experimental. Also, some RDT&E proof of concept
of millimeter wave radiocommunication links are
performed in this band. |
Planned allocations for
59- 59.3 GHz:
radiolocation, fixed,
mobile, inter-satellite,
Earth exploration-satellite
(passive), and space
research (passive).
Planned allocations for
59.3- 64 GHz: fixed,
mobile, radiolocation, and
inter-satellite. |
| 61- 61.5 |
FIXED
INTER-SATELLITE
MOBILE
RADIOLOCATION
S5.138 S5.558 S5.559 |
ISM S5.138 |
ISM. The band 61-61.5 GHz (center frequency 61.25
GHz) is designated for industrial, scientific and
medical (ISM) applications. |
Planned allocations for
59.3- 64 GHz: fixed,
mobile, radiolocation, and
inter-satellite. Use
expected to continue. |
| 61.5- 64 |
FIXED
INTER-SATELLITE
MOBILE
RADIOLOCATION
S5.558 S5.559 |
None |
Experimental. Experimental testing of millimeter
wave radio systems is performed in this band. |
Planned allocations for
59.3- 64 GHz: fixed,
mobile, radiolocation, and
inter-satellite. Use
expected to continue. |
| 64- 65 |
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US246 |
None |
Passive Sensing. Remote sensing used to measure
atmospheric temperature profiles via oxygen
absorption band is done in this band. |
WRC-97 modified this
band as follows and U.S.
implementation is pending:
Passive services are
deleted from the 64- 65
GHz band and fixed
mobile, and inter-satellite
services (ISS Government
only) are added. |
| 65- 66 |
EARTH EXPLORATION-SATELLITE
SPACE RESEARCH
Fixed
Mobile |
None |
None |
WRC-97 modified this
band as follows and U.S.
implementation is pending:
Adding the ISS allocation
to the 65- 71 GHz
band--the U.S. will make
allocation for non-Govt. |
| 66- 71 |
MOBILE S5.553
MOBILE-SATELLITE
RADIONAVIGATION
RADIONAVIGATION-
SATELLITE
S5.554 |
None |
Experimental. RDT&E activities involving radar
cross section measurements is performed in the
68.5-71.5 GHz band. |
WRC-97 modified this
band as follows and U.S.
implementation is pending:
Adding the ISS allocation
to the 65- 71 GHz
band--the U.S. will make
allocation for non-Government. |
| 71- 72.77 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
MOBILE-SATELLITE
(Earth-to-space) |
None |
Experimental. RDT&E activities involving radar
cross section measurements is performed in the
68.5-71.5 GHz band. |
General Unlicensed
devices: FCC, ET Dkt No.
95- 183 (FCC 94- 273),
WTB pt 21.
Licensed millimeter wave
service (71- 71.5 GHz)
(WTB pt 21)- see ET Dkt
No. 94- 124
NATO Joint Freq
Agreemnt identifies 71- 74
GHz for future military FSS
and MSS rqmt for
SATCOM uplinks.
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
change of the direction
indicator of the FSS and
MSS to space-to-Earth
vice Earth-to-space. |
| 72.77- 72.91 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
MOBILE-SATELLITE
(Earth-to-space)
S5.149 US270 |
RADIO ASTRONOMY
US270 |
Radio Astronomy. Spectral-line observations are
made of the formaldehyde line (H2CO) at 72.409 GHz
to include any spectral line shifts (blueline and
redline). |
Scientific research is
expected to continue and
increase in this band.
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
changes: 1) to the
direction indicator of the
FSS and MSS to space-to-Earth vice Earth-to-space;
and 2) deletion of S5.149.
As a result, US270 may be
deleted as well as its
RADIO ASTRONOMY
allocation. |
| 72.91- 74 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
MOBILE-SATELLITE
(Earth-to-space) |
None |
NONE |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
change of the direction
indicator of the FSS and
MSS to space-to-Earth
vice Earth-to-space. |
| 74- 75.5 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
Space Research (space-to-Earth)
US297 |
None |
NONE |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
changes to the direction
indicator of the FSS to
space-to-Earth vice Earth-to-space. |
| 75.5- 76 |
Space Research (space-to-Earth) |
None |
NONE |
|
| 76- 77 |
RADIOLOCATION
Space Research (space-to-Earth) |
None |
NONE |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
changes: 1) to subdivide
the 76-81 GHz band into
76-77.5, 77.5-78, 78-79,
and 79-81 GHz segments;
2) to add RADIO
ASTRONOMY in the
76-77.5 GHz band. |
| 77- 81 |
Space Research (space-to-Earth)
S5.560 |
None |
Space Research. Spaceborne radar measurements
for cloud monitoring is done in this band. |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
changes: 1) to subdivide
the 76-81 GHz band into
76-77.5, 77.5-78, 78-79,
and 79-81 GHz segments;
2) to add RADIO
ASTRONOMY in the
76-77.5 GHz and 79-81
GHz bands; 3) to add
Radio Astronomy in the
77.5-78 GHz and 78-79
GHz bands. |
| 81- 84 |
FIXED
FIXED-SATELLITE
(space-to-Earth)
MOBILE
MOBILE-SATELLITE
(space-to-Earth)
Space Research (space-to-Earth) |
None |
Research. NASA conducts experimental research
in this band for improving rainfall measurement
techniques. |
NATO Joint Freq
Agreemnt identifies 81- 84
GHz for future military FSS
and MSS rqmt for
SATCOM downlinks.
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
change to: 1) change the
direction indicator of the
FSS and MSS to Earth-to-space vice space-to-Earth;
and 2) to add RADIO
ASTRONOMY allocation
and note S5.149 for 81-86
GHz. |
| 84- 86 |
FIXED
MOBILE
US211 S5.561 |
None |
None |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
change to add: 1) FSS
(Earth-to-space); and 2)
RADIO ASTRONOMY
allocation and note
S5.149. |
| 86- 92 |
EARTH EXPLORATION-SATELLITE (passive)
RADIO ASTRONOMY
SPACE RESEARCH
(passive)
US74 US246 |
None |
Passive Sensing. In the EES and SR services, this
band is used to measure reflected sunlight (daytime)
and emitted thermal radiation (night). Measurements
during the day allow for cloudsnowicewateroil
spill discrimination and studies; night measurements
of sea surface temperatures, detection and monitoring
of hot spots (volcanoes, forest fires, etc.). |
Use expected to continue. |
| 92- 93.07 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
RADIOLOCATION
S5.149 S5.556 |
None |
Experimental. RDT&E of various millimeter wave
radar technologies is done in this band. |
Use expected to continue.
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
changes: 1) to add
RADIO ASTRONOMY
allocation; and 2) to delete
the FSS. |
| 93.07- 93.27 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
RADIOLOCATION
S5.149 S5.556 |
None |
Experimental. RDT&E of various millimeter wave
radar technologies is done in this band. |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
changes: 1) to add
RADIO ASTRONOMY
allocation; and 2) to delete
the FSS. |
| 93.27- 94 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
RADIOLOCATION
S5.149 S5.556 |
None |
Radars. NASA conducts fixed and airborne radars
for cloud monitoring measurements and
environmental studies.
Experimental. RDT&E of various millimeter wave
radar technologies and antenna testing is done in this
band. |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 allocation
changes: 1) to add
RADIO ASTRONOMY
allocation; and 2) to delete
the FSS. |
| 94- 94.1 |
EARTH EXPLORATION-SATELLITE (active)
RADIOLOCATION
SPACE RESEARCH
(active)
S5.562 |
None |
Radars. NASA conducts fixed and airborne radars
for cloud monitoring measurements and
environmental studies.
Experimental. RDT&E of various millimeter wave
radar technologies and antenna testing is done in this
band. |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 changes: 1) to
add RADIO ASTRONOMY
allocation; and 2) to add
footnote S5.FFF. |
| 94.1- 95 |
FIXED
FIXED-SATELLITE
(Earth-to-space)
MOBILE
RADIOLOCATION |
None |
Radars. NASA conducts fixed and airborne radars
for cloud monitoring measurements and
environmental studies.
Experimental. RDT&E of various millimeter wave
radar technologies and antenna testing is done in this
band. |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 changes: 1)
to add RADIO
ASTRONOMY allocation;
and 2) to add footnote
S5.149. |
| 95- 97.88 |
MOBILE S5.553
MOBILE-SATELLITE
RADIONAVIGATION
RADIONAVIGATION-
SATELLITE
Radiolocation
S5.554 |
None |
Experimental. Experiment research of atmospheric
anomalies on millimeter wave frequencies is done in
this band. Also, RDT&E activities involving radar
cross section measurements and radar techniques is
performed in this band. |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 changes: 1)
to add RADIO
ASTRONOMY allocation;
2) to add footnote S5.149;
and 3) numerous other
additions/deletions of
allocations. |
| 97.88- 98.08 |
MOBILE S5.553
MOBILE-SATELLITE
RADIONAVIGATION
RADIONAVIGATION-
SATELLITE
Radiolocation
S5.149 S5.554 S5.555 |
RADIO ASTRONOMY
S5.555 |
Radio Astronomy. Spectral-line observations of
carbon sulphide (CS) are studied in this band by radio
astronomers. |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 changes: 1)
to add RADIO
ASTRONOMY allocation;
2) to add footnote S5.149;
and 3) numerous other
additions/deletions of
allocations. |
| 98.08- 100 |
MOBILE S5.553
MOBILE-SATELLITE
RADIONAVIGATION
RADIONAVIGATION-
SATELLITE
Radiolocation
S5.554 |
None |
None |
Awaiting IRAC approval of
AH 206 recommended
implementation of
WRC-2000 changes: 1)
to add RADIO
ASTRONOMY allocation;
2) to add footnote S5.149;
and 3) numerous other
additions/deletions of
allocations. |