Multipath analysis of telemetry support positions for APATS
Abstract
It is anticipated that multipath propagation interference due to reflection from the sea will degrade APATS (ARIA Phased Array Telemetry System) reentry vehicle (RV) telemetry links. However, it is often feasible to reduce such interference by proper tailoring of the receiver position to the RV reentry parameters and telemetry characteristics. Theoretical analyses are presented which advocate specific ARIA flight constraints for several examples of P-band and S-band links in the context of nominal RV-aircraft (APATS) configurations. Issues such as APATs antenna gain, intersymbol interference, coherent and incoherent reflection from the sea, RV antenna gain, differential Doppler, RV-APATS geometry and RV trajectory are addressed in sufficient generally to permit application of basic multipath mitigation principles to a wide range of mission scenarios.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- April 1982
- Bibcode:
- 1982STIN...8228342R
- Keywords:
-
- Multipath Transmission;
- P Band;
- Phased Arrays;
- Reentry Vehicles;
- Superhigh Frequencies;
- Telemetry;
- Antenna Radiation Patterns;
- Doppler Effect;
- Wave Amplification;
- Wave Propagation;
- Space Communications, Spacecraft Communications, Command and Tracking