Aircraft measurement of radio frequency noise at 121.5 MHz, 243MHz and 406MHzAn airborne survey measurement of terrestrial radio-frequency noise over U.S. metropolitan areas has been made at 121.5, 243 and 406 MHz with horizontal-polarization monopole antennas. Flights were at 25,000 feet altitude during the period from December 30, 1976 to January 8, 1977. Radio-noise measurements, expressed in equivalent antenna-noise temperature, indicate a steady-background noise temperature of 572,000 K, at 121.5 MHz, during daylight over New York City. This data is helpful in compiling radio-noise temperature maps; in turn useful for designing satellite-aided, emergency-distress search and rescue communication systems.
Document ID
19780055196
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Taylor, R. E. (NASA Goddard Space Flight Center Greenbelt, Md., United States)
Hill, J. S. (RCA Service Co., Inc. Springfield, Va., United States)