Differential global positioning system uplink telemetry

摘要

NASA Ames Research Center has been investigating a Differential Global Positioning System (DGPS) for future use as a Category II/III landing system. The DGPS navigation system was developed and flight tested on a B200 King Air aircraft. This paper discusses the telemetry system used to uplink the differential GPS data from a mobile ground station. The discussion incorporates problems and solutions on a telemetry uplink system in an airborne environment.