Scattering error in radiometric measurements of rain attenuation at 37 GHz
Abstract
Radiometric measurements of rain attenuation at 37 GHz are discussed by comparing the attenuation obtained using sun/sky signal with that of estimated attenuation deduced from aerial noise measurements. Statistics of error in estimated attenuation from thermal emission measurements are analyzed for various ranges of elevation angles in the light of one-year observations. It is shown that the results obtained by a passive radiometer at 37 GHz are in error if scattering effects are neglected, and that for rain rates exceeded for 0.01% of time, thermal-emission measurements of rain attenuation at 37 GHz are in error by 3.2 dB in 9.1 dB in the elevation range of 25 - 35 deg.
- Publication:
-
Journal of the Institution of Electronics and Telecommunication Engineers
- Pub Date:
- August 1979
- Bibcode:
- 1979JIETE..25..333C
- Keywords:
-
- Atmospheric Attenuation;
- Atmospheric Scattering;
- Error Analysis;
- Microwave Radiometers;
- Radio Attenuation;
- Rain;
- Cumulus Clouds;
- Radio Signals;
- Signal Fading;
- Spacecraft Communication;
- Statistical Analysis;
- Thermal Emission;
- Thunderstorms;
- Space Communications, Spacecraft Communications, Command and Tracking