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Undifferenced GPS Ambiguity Resolution Using the Decoupled Clock Model and Ambiguity Datum Fixing

COLLINS, PAUL, BISNATH, SUNIL, LAHAYE, FRANÇOIS, HÉROUX, PIERRE·2010·Navigation

Abstract

This paper describes a method of processing Global Positioning System (GPS) observations to achieve undifferenced ambiguity resolution. Dual-frequency carrier phase and pseudorange measurements are processed by specifying separate oscillator parameters for the carrier phase and pseudorange measurements. Carrier phase estimates of the oscillator errors are arbitrarily biased with respect to the pseudorange estimates, and ambiguity parameters are constrained to be integer-valued. A network solution is necessary to compute the satellite code and phase clocks required as fixed parameters in single-user Precise Point Positioning (PPP) solutions. In the PPP results presented here, the LAMBDA method was used to optimally resolve ambiguities at each epoch. Only a small improvement in position error is gained with 5-minute static processing over 24 hours. However, there is a significant reduction in convergence time, and with 30-sec static processing after 60 minutes, 90 % of solutions approach 2cm horizontal error, compared to 10cm for standard PPP. 2

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Metadata

Authors
COLLINS, P., BISNATH, S., LAHAYE, F., & HÉROUX, P.
Venue
Navigation
Published
2010-06
Volume
57
Issue
2
Pages
123-135
ISSN
0028-1522 (ISSN-L)
OpenAlex
W1972063889
Cited by
324
References
13
FWCI
18.16
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Undifferenced GPS Ambiguity Resolution Using the Decoupled Clock Model and Ambiguity Datum Fixing. https://app.cochat.ai/papers/10.1002/j.2161-4296.2010.tb01772.x
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COLLINS, P., BISNATH, S., LAHAYE, F., & HÉROUX, P. (2010). Undifferenced GPS Ambiguity Resolution Using the Decoupled Clock Model and Ambiguity Datum Fixing. Navigation. https://doi.org/10.1002/j.2161-4296.2010.tb01772.x

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