Cycle Slip Detection and Repair for Dual-Frequency LEO Satellite GPS Carrier Phase Observations with Orbit Dynamic Model Information

Cycle slip detection and repair are crucial for precise GPS-derived orbit determination of the low-Earth orbit (LEO) satellites. We present a new approach to detect and repair cycle slips for dual-frequency LEO satellite GPS observations. According to Newton’s equation of motion, the second-order ti...

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Published inRemote sensing (Basel, Switzerland) Vol. 11; no. 11; p. 1273
Main Authors Wei, Hui, Li, Jiancheng, Zhang, Shoujian, Xu, Xinyu
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2019
Subjects
Acceleration
Accuracy
cycle slip detection
Dynamic models
Earth orbits
Equations of motion
Geometry
geometry-free liner combination
Global positioning systems
GPS
Ionosphere
ionospheric-free liner combination
Kinematics
LEO satellite
Low earth orbit satellites
Low earth orbits
Methods
Orbit determination
Receivers
Remote sensing
Repair
Satellite navigation systems
Satellite observation
Satellite orbits
Satellites
second-order time difference
Slip
Germany
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Summary:Cycle slip detection and repair are crucial for precise GPS-derived orbit determination of the low-Earth orbit (LEO) satellites. We present a new approach to detect and repair cycle slips for dual-frequency LEO satellite GPS observations. According to Newton’s equation of motion, the second-order time difference of the LEO satellite’s position (STP) is only related to the sampling interval and the satellite’s acceleration, which can be precisely obtained from the known orbit dynamic models. Then, several kinds of second-order time-difference geometry-free (STG) phase combinations, taking full advantage of the correlation between the satellite orbit variations and the dynamic model, with different level of ionospheric residuals, are proposed and adopted together to detect and fix cycle slips. The STG approach is tested with some LEO satellite GPS datasets. Results show that it is an effective cycle slip detection and repair method for LEO satellite GPS observations. This method also has some important features. Firstly, the STG combination is almost independent of the pseudorange. Secondly, this method is effective for LEO satellites, even in real-time application. Thirdly, this method is suitable for ground-based GPS receivers if we know the acceleration of the receivers.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs11111273