Accession Number : ADA114057

Title :   Multipath Analysis of Telemetry Support Positions for APATS.

Descriptive Note : Technical rept.,

Corporate Author : MITRE CORP BEDFORD MA

Personal Author(s) : Robertshaw,G A

PDF Url : ADA114057

Report Date : Apr 1982

Pagination or Media Count : 112

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.

Descriptors :   *Telemeter systems, *Multipath transmission, Reentry vehicles, Interference, Electromagnetic wave reflections, Electromagnetic wave propagation, P band, S band, Intersymbol interference, Scenarios

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE