Evaluation of Methodologies for Airborne Global Positioning System Data Analysis

Maria A. Marsella and Larry D. Hothem

Abstract:	The U.S. Geological Survey has recently conducted two airborne Global Positioning System (GPS) projects within the NAPP Progmm. Dattt! were collected with dual-frequency receivers on the aircraft and the ground stations located about the project center. Ll and L2 P- code pseudoranges and LZ full-wavelength carrier phase measurements were collected with the C/A code pseudoranges, Ll carrier phase and L2 codeless carrier Ph= Postprocessing software packages are used to investigate! the expanded capabilities made possible by the large choice of observables. Samples of the kinematic data collected during the projects were processed with Ashtech’s PNAV program, a Kalman filtering software package recently developed with On The Fly (OTF) ambiguity resolution capability. Several factors affecting the kinematic results were considered. These included the satellite configuration, the number of satellites and the dhnce between aircraft and reference stions. Ambiguity resolution capabilities and Kalman filtering algorithm are assessed. Double-difference carrier phase kinematic solution with KlNSRVY and K&RS are used as a standard to evaluate the results obtained from PNAV.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	1081 - 1088
Cite this article:	Marsella, Maria A., Hothem, Larry D., "Evaluation of Methodologies for Airborne Global Positioning System Data Analysis," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 1081-1088.
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