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Simulation study for the determination of the lunar gravity field from PRARE-L tracking onboard the German LEO mission

Flechtner, F. und Neumayer, K. H. und Kusche, J. und Schäfer, W. und Sohl, F. (2008) Simulation study for the determination of the lunar gravity field from PRARE-L tracking onboard the German LEO mission. Advances in Space Research, 42 (8), Seiten 1405-1413. Elsevier. DOI: 10.1016/j.asr.2008.06.003.

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Kurzfassung

A simulation study has been performed at GFZ Potsdam, which shows the anticipated improvement of the lunar gravity field model with respect to current (LP150Q model) or near-future (SELENE) knowledge in the framework of the planned German Lunar Explorations Orbiter (LEO) mission, based on PRARE-L (Precise Range And Range-rate Equipment – Lunar version) Satellite-to-Satellite (SST) and Satellite-Earth-Satellite (SEST) tracking observations. It is shown that the global mean error of the lunar gravity field can be reduced to less than 0.1 mGal at a spatial resolution of 50 km. In the spectral domain, this means a factor of 10 (long wavelengths) and some 100 (mid to short wavelengths) improvement as compared to predictions for SELENE or a factor of 1000 with respect to LP150Q. Furthermore, a higher spatial resolution of up to 28 km seems feasible and would correspond to a factor of 2–3 improvement of SELENE results. Moreover, PRARE-L is expected to derive the low-degree coefficients of the lunar gravity field with unprecedented accuracy. Considering long mission duration (at least 1 year is planned) this would allow for the first time a precise direct determination of the low-degree tidal Love numbers of the Moon and, in combination with high precision SEST, would provide an experimental basis to study relativistic effects such as the periselenium advance in the Earth–Moon system.

Dokumentart:Zeitschriftenbeitrag
Titel:Simulation study for the determination of the lunar gravity field from PRARE-L tracking onboard the German LEO mission
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Flechtner, F.GFZ Potsdam/ DLR Oberpfaffenhofen, Germany
Neumayer, K. H.GFZ Potsdam/ DLR Oberpfaffenhofen, Germany
Kusche, J.GFZ Potsdam, Germany
Schäfer, W.TimeTech GmbH, Stuttgart, Germany
Sohl, F.NICHT SPEZIFIZIERT
Datum:Oktober 2008
Erschienen in:Advances in Space Research
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:42
DOI :10.1016/j.asr.2008.06.003
Seitenbereich:Seiten 1405-1413
Verlag:Elsevier
Status:veröffentlicht
Stichwörter:Moon; Lunar gravity field determination; LEO; PRARE-L; Satellite-to-Satellite tracking
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Vergleichende Planetologie (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetenphysik
Hinterlegt von: Stefanie Hempel
Hinterlegt am:14 Okt 2008
Letzte Änderung:27 Apr 2009 14:39

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