Some results from 19 and 28 GHz Comstar beacon propagation experiments
Abstract
The two Comstar Communications satellites carry continuously-operating 19 and 28 GHz beacons, allowing comprehensive earth-satellite propagation measurements. Two receiving systems at Crawford Hill, New Jersey, are measuring propagation phenomena using these two beacons. A yearly distribution of 19 GHz attenuation is presented; during the measurement interval, attenuation exceeded 10 dB for 11 hours. These results correlate well with previous radiometer measurements. Significant depolarization has been observed from ice crystals in the path. These events have been observed in both summer and winter. Depolarization levels are well correlated at 19 and 28 GHz, and may exceed -20 dB with insignificant copolarized signal attenuation.
- Publication:
-
7th Communications Satellite Systems Conference
- Pub Date:
- 1978
- Bibcode:
- 1978coss.conf..616A
- Keywords:
-
- Beacon Satellites;
- Communication Satellites;
- Microwave Transmission;
- Radio Attenuation;
- Wave Propagation;
- Atmospheric Effects;
- Centimeter Waves;
- Data Recording;
- Depolarization;
- Communications and Radar