Measurement of relative propagation delay between C- and K-band satellite loops
Abstract
Variations in relative propagation delay between C- and K-band satellite loops were measured using the Japanese medium capacity communications satellite. This measurement employed an FM and a TDMA method. The maximum observed delay change was about 6 nsec during the approximately 10-day experimental period. The experimental results show that the delay variations are caused mainly by variations of the total electron content in the ionosphere. A small change of about 0.2 nsec due to the spin motion of the satellite is also found. These results will be useful for designing satellite communications systems in which two frequency bands such as the C and K band are used simultaneously, and switching or synchronization among them is necessary.
- Publication:
-
Radio Research Laboratory, Review
- Pub Date:
- March 1982
- Bibcode:
- 1982RaRLR..28....1K
- Keywords:
-
- C Band;
- Domestic Satellite Communications Systems;
- Extremely High Frequencies;
- Ionospheric Propagation;
- Japanese Spacecraft;
- Time Lag;
- Frequency Modulation;
- Ionospheric Electron Density;
- Time Division Multiple Access;
- Communications and Radar