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Both shots were over 340 miles (550 km), requiring large 120 ft (37 m) antennas and 50 kW transmitters. Both sites were demolished before 1987. In addition to the Aleutian Island extension, Project Bluegrass also included a 50 kW shot from Fort Yukon to Barter Island to connect the northern DEW line to the White Alice system.
For frequency diversity, each antenna transmitted two separate frequencies. Using both frequency and space diversity was called quad diversity. System power output for most shots was 10 kW and used 60 ft (18 m) antennas. Longer shots used 120 ft (37 m) antennas with 50 kW and shorter shots used 1 kW and 30 ft (9 m), round parabolic dishes.
Pages in category "Military radio systems of the United States" The following 114 pages are in this category, out of 114 total. This list may not reflect recent changes .
Each ring of elements receives RF signals for an assigned portion of the 1.5 to 30-MHz radio spectrum. The outer ring normally covers the 2 to 6-MHz range (band A), but also provides reduced coverage down to 1.5 MHz. The center ring covers the 6 to 18-MHz range (band B) and the inner ring covers the 18 to 30-MHz range (band C).
Typical GWEN relay node. The Ground Wave Emergency Network (GWEN) was a US Air Force command and control communications system, deployed briefly between 1992 and 1994, intended for use by the United States government to facilitate military communications before, during and after a nuclear war.
Much of the site is devoted to the enormous overhead wire antenna array that is necessary to efficiently radiate the VLF waves. The antenna, shown above, consists of ten catenary cables, 5,640–8,700 ft (1,719–2,652 m, 1.1–1.6 miles) long, suspended in a zigzag pattern over the valley between Wheeler mountain and Blue mountain on twelve 200 ft. towers on the mountains' crests.
The normal frequency management in military forces is based on policies, guides, procedures, organizational and technical manuals. The preparation, their harmonization with international, regional and national regulations and adherence to technological developments is a continuous task that requires time to be realized from proper military ...
Eglin AFB Site C-6 is a United States Space Force radar station which houses the AN/FPS-85 phased array radar, associated computer processing system(s), and radar control equipment designed and constructed for the U. S. Air Force by the Bendix Communications Division, Bendix Corporation.
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