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Broadcast versus Precise Ephemerides: a Multi-GNSS Perspective

Montenbruck, Oliver and Steigenberger, Peter and Hauschild, André (2015) Broadcast versus Precise Ephemerides: a Multi-GNSS Perspective. GPS Solutions, 19 (2), pp. 321-333. Springer. DOI: 10.1007/s10291-014-0390-8 ISSN 1080-5370

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A consistent analysis of signal-in-space ranging errors (SISREs) is presented for all current satellite navigation systems, considering both global average values and worst-user-location statistics. The analysis is based on one year of broadcast ephemeris messages of GPS, GLONASS, Galileo, BeiDou and QZSS collected with a near-global receiver network. Position and clock values derived from the navigation data are compared against precise orbit and clock products provided by the International GNSS Service (IGS) and its Multi-GNSS Experiment (MGEX). Satellite laser ranging measurements are used for a complementary and independent assessment of the orbit-only SISRE contribution. The need for proper consideration of antenna offsets is highlighted and block/constellation specific radial antenna offset values for the center-of-mass correction of broadcast orbits are derived. Likewise, the need for application of differential code biases in the comparison of broadcast and precise clock products is emphasized. For GPS, the analysis of the legacy navigation message is complemented by a discussion of the CNAV message performance based on the first CNAV test campaign in June 2013. Global average SISRE values for the individual constellations amount to 0.7+/-0.02 m (GPS), 1.5+/-0.1 m (BeiDou), 1.6+/-0.3 m (Galileo), 1.9+/-0.1 m (GLONASS), and 0.6+/-0.2 m (QZSS) over a twelve-month period in 2013/14.

Item URL in elib:https://elib.dlr.de/92092/
Document Type:Article
Title:Broadcast versus Precise Ephemerides: a Multi-GNSS Perspective
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Journal or Publication Title:GPS Solutions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s10291-014-0390-8
Page Range:pp. 321-333
Keywords:Broadcast ephemeris accuracy, orbit and clock errors, SISRE, worst-user-location, GPS, GLONASS, Galileo, BeiDou, QZSS, MGEX, SLR, CNAV, antenna offsets
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Vorhaben Infrastruktur und Unterstützung für Raumflugbetrieb
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Montenbruck, Dr.rer.nat.hab. Oliver
Deposited On:19 Nov 2014 09:33
Last Modified:11 Aug 2015 09:55

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