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GPS Carrier-Phase Time Transfer Using Single-Difference Integer Ambiguity Resolution
Joint Authors
Mercier, F.
Delporte, J.
Galy, O.
Laurichesse, D.
Source
International Journal of Navigation and Observation
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-12-31
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
GPS is widely used for time and frequency transfer.
To estimate the clock difference between two ground stations, a single baseline solution can be performed using external products for the modelling of the geometrical effects (constellation ephemeris and station coordinates).
The baseline solution relies on a single-difference formulation, using code and phase ionosphere-free measurements.
The phase ambiguities are usually adjusted as floating parameters.
Such solutions give very good results when modelling hypotheses are consistent between the external solution (e.g., GPS orbits) and the baseline solution.
However, the frequency bias in the computed clock is very sensitive to discrepancies in the models, and is only observed thanks to the code measurement, with limitations due to the noise.
Here, we propose to solve the integer ambiguities on single-difference phase measurements.
The advantage is the complete elimination of the clock drifts observed in floating ambiguities solutions.
This formulation allows also a reliable continuous connection between overlapping clock solutions (jumps between such solutions can be completely eliminated).
Several time transfer results are analyzed and compared to TWSTFT.
The methodology has been extended to a network of stations using integer ambiguities on zero-difference measurements.
The corresponding results are given for a few European stations.
American Psychological Association (APA)
Delporte, J.& Mercier, F.& Laurichesse, D.& Galy, O.. 2008. GPS Carrier-Phase Time Transfer Using Single-Difference Integer Ambiguity Resolution. International Journal of Navigation and Observation،Vol. 2008, no. 2008, pp.1-7.
https://search.emarefa.net/detail/BIM-459410
Modern Language Association (MLA)
Delporte, J.…[et al.]. GPS Carrier-Phase Time Transfer Using Single-Difference Integer Ambiguity Resolution. International Journal of Navigation and Observation No. 2008 (2008), pp.1-7.
https://search.emarefa.net/detail/BIM-459410
American Medical Association (AMA)
Delporte, J.& Mercier, F.& Laurichesse, D.& Galy, O.. GPS Carrier-Phase Time Transfer Using Single-Difference Integer Ambiguity Resolution. International Journal of Navigation and Observation. 2008. Vol. 2008, no. 2008, pp.1-7.
https://search.emarefa.net/detail/BIM-459410
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-459410