SHF SATCOM Interference Study
Final technical rept. May 1974-Jun 1975
AIR FORCE AVIONICS LAB WRIGHT-PATTERSONAFB OH
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This technical report describes a cooperative study, measurement and analysis effort by the USAF and other Federal Agencies to experimentally quantify the potential interference between an airborne SHF SATCOM terminal and various terrestrial microwave and space systems operating in the 7.9 to 8.4 GHz frequency band. This investigation resulted because of concern voiced by the Office of Telecommunications Policy OTP based on a Spectrum Resource Assessment of the 7.25-8.40 GHz band conducted by the Department of Commerce, Office of Telecommunications. The Advanced Airborne Command Post plans to implement an airborne SHF SATCOM terminal aboard its E-4 aircraft to provide reliable command and control communications. Since the SHF frequency band 7.9-8.4 GHz is allocated for terrestrial microwave and space system use, it was necessary to experimentally verify the interference potential of the airborne terminal and to identify spectrum sharing options. To assure this, a detailed analysis was performed to identify acceptable interference levels for a number of terrestrial microwave and space systems. Next, a series of ground and flight test measurements were made against representative terrestrial microwave terminals and the NASA Goldstone deep space tracking station. These results determined the mutual coupling levels between the airborne SHF SATCOM antennas and the terrestrial microwave and space system antennas.
- Unmanned Spacecraft
- Command, Control and Communications Systems