Publication Date:
2019-07-13
Description:
An airborne survey measurement of terrestrial radio-frequency noise over U.S. metropolitan areas was carried out at 121.5, 243 and 406 MHz with horizontal-polarization monopole antennas. Flights were at 25,000 feet altitude. 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.
Keywords:
COMMUNICATIONS AND RADAR
Type:
NASA-TM-X-71283
,
X-952-77-11
,
Symp. and Technical Exhibition on Electromagnetic Compatibility; Jun 28, 1977 - Jun 30, 1977; Montreux; Switzerland
Format:
application/pdf
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