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Reduced Dynamic and Kinematic Precise Orbit Determination for the Swarm Mission from Four Years of GPS Tracking

Montenbruck, Oliver and Hackel, Stefan and van den IJssel, Jose and Arnold, Daniel (2018) Reduced Dynamic and Kinematic Precise Orbit Determination for the Swarm Mission from Four Years of GPS Tracking. GPS Solutions, 22 (3), p. 79. Springer. DOI: 10.1007/s10291-018-0746-6 ISSN 1080-5370

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Precise science orbits for the first four years of the Swarm mission have been generated from onboard GPS measurements in a systematic reprocessing using refined models and processing techniques. Key enhancements relate to the introduction of macro-models for a more elaborate non-gravitational force modeling (solar radiation pressure, atmospheric drag and lift, earth albedo), as well as carrier phase ambiguity fixing. Validation using satellite laser ranging demonstrates a 30% improvement in the precision of the reduced dynamic orbits with resulting errors at the 0.5-1 cm level (1D RMS). A notable performance improvement is likewise achieved for the kinematic orbits, which benefit most from the ambiguity fixing and show a 50% error reduction in terms of SLR residuals while differences with respect to reduced dynamic ephemerides amount to only 1.7 cm (median of daily 3D RMS). Compared to the past kinematic science orbits based on float-ambiguity estimates, the new kinematic position solutions exhibit a factor of reduction of two to three in Allan deviation at time scales of 1000 s and higher, and promise an improved recovery of low-degree and -order gravity field coefficients in Swarm gravity field analyses.

Item URL in elib:https://elib.dlr.de/124352/
Document Type:Article
Title:Reduced Dynamic and Kinematic Precise Orbit Determination for the Swarm Mission from Four Years of GPS Tracking
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Montenbruck, OliverDLR/GSOChttps://orcid.org/0000-0003-4783-745X
Hackel, Stefanstefan.hackel (at) dlr.deUNSPECIFIED
van den IJssel, JoseTU DelftUNSPECIFIED
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/s10291-018-0746-6
Page Range:p. 79
Keywords:POD, GPS, SLR, Ambiguity fixing, Non-gravitational forces
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:10 Dec 2018 16:18
Last Modified:10 Dec 2018 16:18

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