High-Rate Monitoring of Satellite Clocks Using Two Methods of Averaging Time

Knowledge of the global navigation satellite system (GNSS) satellite clock error is crucial in real-time precise point positioning (PPP), seismology, and many other high-rate GNSS applications. In this work, the authors show the characterisation of the atomic GNSS clock’s stability and its dependenc...

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Bibliographic Details
Published inRemote sensing (Basel, Switzerland) Vol. 11; no. 23; p. 2754
Main Authors Maciuk, Kamil, Lewińska, Paulina
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2019
Subjects
Accuracy
Clocks
Clocks & watches
Deviation
Global navigation satellite system
Global positioning systems
GPS
Ground stations
Kinematics
Orbits
Oscillators
Remote sensing
Sample variance
Satellite navigation systems
Satellites
Seismology
Standard deviation
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Summary:Knowledge of the global navigation satellite system (GNSS) satellite clock error is crucial in real-time precise point positioning (PPP), seismology, and many other high-rate GNSS applications. In this work, the authors show the characterisation of the atomic GNSS clock’s stability and its dependency on the adopted orbit type using Allan deviation with two methods of averaging time. Four International GNSS Service (IGS) orbit types were used: broadcast, ultra-rapid, rapid and final orbit. The calculations were made using high-rate 1 Hz observations from the IGS stations equipped with external clocks (oscillators). The most stable receiver oscillator was chosen as a reference clock. The results show the advantage of the newest GPS satellite block with respect to the other satellites. Significant differences in the results based on the orbit type used have not been recorded. Many averaging time methods used in Allan deviation (ADEV) show the clock’s fluctuations, usually smoothed in 2n s averaging times.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs11232754