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Short-Term Analysis of GNSS Clocks

Hauschild, André and Montenbruck, Oliver (2013) Short-Term Analysis of GNSS Clocks. GPS Solutions, 17 (3), pp. 295-307. Springer. doi: 10.1007/s10291-012-0278-4. ISSN 1080-5370.

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A characterization of the short-term stability of the atomic frequency standards onboard GNSS satellites is presented. Clock performance is evaluated using two different methods. The first method derives the temporal variation of the satellite’s clock from a polynomial fit through 1-way carrier-phase measurements from a receiver directly connected to a high-precision atomic frequency standard. Alternatively, 3-way measurements using inter-station single-differences of a second satellite from a neighboring station are used if the receiver’s clock stability at the station tracking the satellite of interest is not sufficient. The second method is a Kalman-filter based clock estimation based on dual-frequency pseudorange and carrier-phase measurements from a small global or regional tracking network. Both methods are introduced and their respective advantages and disadvantages are discussed. The analysis section presents a characterization of GPS, GLONASS, GIOVE, Galileo IOV, QZSS and COMPASS clocks based on these two methods. Special focus has been set on the frequency standards of new generation satellites like GPS Block IIF, QZSS and IOV as well as the Chinese COMPASS/BeiDou-2 system. The analysis shows results for the Allan deviation covering averaging intervals from 1 second to 1000 seconds, which is of special interest for real-time PPP and other high-rate applications like processing of radio-occultation measurements. The clock interpolation errors for different sampling rates are evaluated for different types of clocks and their effect on PPP is discussed.

Item URL in elib:https://elib.dlr.de/82090/
Document Type:Article
Title:Short-Term Analysis of GNSS Clocks
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Journal or Publication Title:GPS Solutions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 295-307
Keywords:Clock Analysis, Allan Deviation, GNSS, GPS Block IIF, QZSS, COMPASS, Galileo IOV, real-time PPP
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Vorhaben Infrastruktur und Unterstützung für Raumflugbetrieb (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Montenbruck, Dr.rer.nat.hab. Oliver
Deposited On:26 Apr 2013 15:34
Last Modified:05 Feb 2014 09:20

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