Ambiguity Resolution "On-The-Fly" Using the Latest Generation of GPS-Receivers

Knud Sauermann, Matthias H. Becker, and Andreas Mathes

Abstract:	The estimation and selection of double-difference phase ambiguities during a kinematic GPS-survey is the critical task to achieve high precision coordinate and eventually attitude parameters of moving GPS-recei- vers. With the advent of the full GPS-constellation the “On-The-Fly” (OTF) ambiguity resolution becomes practicable for routine use. A new algorithm using smoothed and double-diffe- rented pseudorange observables in combination with double-differenced carrier phases is developed within this paper in order to select the proper set of ambigui- ties with minimized impact on the sum of squared re- siduals. Test measurements using different types of observa- tions were conducted in order to investigate the per- formance of the OTF-algorithm. It is shown, that ob- servation periods of approximately two minutes for baselines up to 10 km are sufficient to initialize ambi- guities for a moving receiver in an environment with moderate dynamics like car, ship or small airplane. The paper presents the strategy of the search algo- rithm applied and gives various numerical examples. True P-Code and cross-correlated data are compared.
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:	1107 - 1114
Cite this article:	Sauermann, Knud, Becker, Matthias H., Mathes, Andreas, "Ambiguity Resolution "On-The-Fly" Using the Latest Generation of GPS-Receivers," 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. 1107-1114.
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