Helicopter flight test demonstration of differential GPSAn off-line post-mission processing facility is being established by NASA Ames Research Center to analyze differential GPS flight tests. The current and future differential systems are described, comprising an airborne segment in an SH-3 helicopter, a GPS ground reference station, and a tracking system. The post-mission processing system provides for extensive measurement analysis and differential computation. Both differential range residual corrections and navigation corrections are possible. Some preliminary flight tests were conducted in a landing approach scenario and statically. Initial findings indicate the possible need for filter matching between airborne and ground systems (if used in a navigation correction technique), the advisability of correction smoothing before airborne incorporation, and the insensitivity of accuracy to either of the differential techniques or to update rates.
Document ID
19860041700
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Denaro, R. P. (Theory and Applications Unlimited Corp. Los Gatos, CA, United States)
Beser, J. (TAU Corp. Los Gatos, CA, United States)