Aerial Noise Temperature Measurements at 3.95, 11.75 and 17 GHz: General Review and Measurements to April, 1970.
Rept. for May 67-Apr 70,
POST OFFICE RESEARCH DEPT LONDON (ENGLAND)
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The need to use higher frequencies for satellite communication systems will arise in the future, and greater knowledge of the noise characteristics of the atmosphere is required to facilitate system design. The work described provides information for several purposes. Statistical information, applicable to operation with the Intelsat III Indian Ocean satellite from this country, is provided on the variation from clear sky conditions of the aerial noise component of system noise temperature at 4 GHz and 5 degrees elevation angle. Measurements were also made at 11.75 GHz and 17 GHz using the same beam width as used at 4 GHz for comparison with the 4 GHz measurements so that the dependence on frequency of variations in aerial noise temperature could be determined. The effects of rain and of cloud cover have been separately estimated, and the estimated and measured cumulative curves are presented for comparison. Author
- Radiofrequency Wave Propagation
- Unmanned Spacecraft
- Non-Radio Communications