Sorry, you need to enable JavaScript to visit this website.
Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.

Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.

The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Spectrum Resource Assessment of Government Use of the HF (3-30 MHz) Band

Report ID
TM 89-141
June 01, 1989
Abstract

This report is a spectrum resource assessment of the HF band (3-30 MHz). It incudes information on rules, regulations, allocations, technical standards, frequency assignments, system characteristics, and special uses unique to the HF band. The impact on HF services brought about by new technologies is discussed along with potential impacts of HF Over-the-Horizon (OTH) radars and ionospheric sounders. The importance of domestic emergency communications in the HF band is discussed along with new standards for interoperability presently being drafted.