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On One-way Doppler Measurements of Space Craft and Celestial Objects

Jochim, Fritz (2010) On One-way Doppler Measurements of Space Craft and Celestial Objects. Acta Astronautica, Volume 66 (1 - 2), Seiten 309-330. Elsevier. DOI: 10.1016/j.actaastro.2009.09.001. ISSN 0094-5765.

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Kurzfassung

The orbital velocity of a spacecraft and other celestial objects is monitored by observing the Doppler frequency shift of the signals received at the ground station. This is possible one-way in case the transmitted frequency is stable enough. In most spacecraft a calibrated transponder allows two-way Doppler frequency registrations. In general, the factor 2 is expected as the quotient between two- and one-way frequencies. However, this is no longer the case when the motion of the observed object deviates from the orbit as predicted. Frequency differences appear. Porsche (1999) has published a formula to describe these differences based on the assumption of a double projection of the true velocity vector. In the present paper a more sophisticated analysis of the influence of state errors on the track-ing results is deduced. This theory has been tested by the Doppler measurements during flybys of the comet space probe GIOTTO penetrating through the comae of the comets P/Halley and P/Grigg-Skjellerup. One-way Doppler measurements of the low Earth satellites CHAMP and TERRASAR-X show a tendency for the applicability of this approach. Finally, some conse-quences for the observation of other celestial objects are discussed.

Dokumentart:Zeitschriftenbeitrag
Titel:On One-way Doppler Measurements of Space Craft and Celestial Objects
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Jochim, FritzNICHT SPEZIFIZIERT
Datum:Januar 2010
Erschienen in:Acta Astronautica
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:Volume 66
DOI :10.1016/j.actaastro.2009.09.001
Seitenbereich:Seiten 309-330
Verlag:Elsevier
ISSN:0094-5765
Status:veröffentlicht
Stichwörter:One way Doppler measurements Interplanetary missions Giotto Satellite tracking Spacecraft state perturbation
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Projekt sicherheitsrelevante Erdbeobachtung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Aufklärung und Sicherheit
Hinterlegt von: Thomas Neff
Hinterlegt am:05 Feb 2010 07:13
Letzte Änderung:21 Mär 2014 11:30

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