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Antenna Phase Center Calibration for Precise Positioning of LEO Satellites

Montenbruck, Oliver und Garcia-Fernandez, Miquel und Yoon, Yoke und Schön, Steffen und Jäggi, Adrian (2009) Antenna Phase Center Calibration for Precise Positioning of LEO Satellites. GPS Solutions, 13 (1), Seiten 23-34. DOI: 10.1007/s10291-008-0094-z.

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Kurzfassung

Phase center variations of the receiver and transmitter antenna constitute a remaining uncertainty in the high precision orbit determination (POD) of low Earth orbit (LEO) satellites using GPS measurements. Triggered by the adoption of absolute phase patterns in the IGS processing standards, a calibration of the Sensor Systems S67-1575-14 antenna with GFZ choke ring has been conducted that serves as POD antenna on various geodetic satellites such as CHAMP, GRACE and TerraSAR-X. Nominal phase patterns have been obtained with a robotic measurement system in a field campaign and the results were used to assess the impact of receiver antenna phase patterns on the achievable positioning accuracy. Along with this, phase center distortions in the actual spacecraft environment were characterized based on POD carrier phase residuals for the GRACE and TerraSAR-X missions. It is shown that the combined ground and in-flight calibration can improve the carrier phase modeling accuracy to a level of 4 mm which is close to the pure receiver noise. A 3.5 cm (3D rms) consistency of kinematic and reduced dynamic orbit determination solutions is achieved for TerraSAR-X, which presumably reflects the limitations of presently available GPS ephemeris products. The reduced dynamic solutions themselves match the observations of high grade satellite laser ranging stations to 1.5 cm but are potentially affected by cross-track biases at the cm-level. With respect to the GPS-based relative navigation of TerraSAR-X/TanDEM-X formation, the in-flight calibration of the antenna phase patterns is considered essential for an accurate modeling of differential carrier phase measurements and a mm-level baseline reconstruction.

Dokumentart:Zeitschriftenbeitrag
Titel:Antenna Phase Center Calibration for Precise Positioning of LEO Satellites
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Montenbruck, OliverNICHT SPEZIFIZIERT
Garcia-Fernandez, MiquelNICHT SPEZIFIZIERT
Yoon, YokeNICHT SPEZIFIZIERT
Schön, SteffenIFE, Univ. Hannover
Jäggi, AdrianAIUB
Datum:10 Januar 2009
Erschienen in:GPS Solutions
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:13
DOI :10.1007/s10291-008-0094-z
Seitenbereich:Seiten 23-34
Status:veröffentlicht
Stichwörter:Antennas, Phase Center Variation, Orbit Determination, LEO satellites, TerraSAR-X, CHAMP, GRACE
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W - keine Zuordnung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):W -- keine Zuordnung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Raumflugbetrieb und Astronautentraining
Hinterlegt von: Dr.rer.nat.hab. Oliver Montenbruck
Hinterlegt am:22 Jan 2009
Letzte Änderung:07 Feb 2013 20:18

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