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The Phobos geodetic control point network and rotation model

Oberst, J. and Zubarev, A. and Nadezhdina, I. and Shishkina, L. and Rambaux, N. (2014) The Phobos geodetic control point network and rotation model. Planetary and Space Science, 102, pp. 45-50. Elsevier. DOI: 10.1016/j.pss.2014.03.006 ISSN 0032-0633

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Official URL: http://www.sciencedirect.com/science/article/pii/S0032063314000646

Abstract

A new global control point network was derived for Phobos, based on SRC (Mars Express), Phobos-2, and Viking Orbiter image data. We derive 3-D Cartesian coordinates for 813 control points as well as improved pointing data for 202 SRC and Viking images in the Phobos-fixed coordinate system. The point accuracies vary from 4.5 m on the Phobos nearside, to up to 67.0 m on the farside, where we rely on Viking images (average point accuracy: 13.7 m). From tracking of the control points we detect a librational motion synchronous to the Phobos orbital period and measure libration amplitude of 1.09°, in agreement with predictions from shape information assuming a uniform interior. This suggests that the interior of Phobos is homogeneous – but small local mass anomalies, e.g., associated with crater Stickney, cannot be ruled out. Our new control point network has a higher number of data points and higher point accuracy than previous data products and will be an important basis for accurate shape models and maps.

Item URL in elib:https://elib.dlr.de/94200/
Document Type:Article
Title:The Phobos geodetic control point network and rotation model
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Oberst, J.Juergen.Oberst (at) dlr.deUNSPECIFIED
Zubarev, A.Moscow State University of Geodesy and Cartography (MIIGAiK), Moscow, RussiaUNSPECIFIED
Nadezhdina, I.Moscow State University of Geodesy and Cartography (MIIGAiK), Moscow, RussiaUNSPECIFIED
Shishkina, L.Moscow State University of Geodesy and Cartography (MIIGAiK), MIIGAiK Extraterrestrial Laboratory (MExLab), MOSCOW, Russian FederationUNSPECIFIED
Rambaux, N.IMCCE, Observatoire de Paris, FranceUNSPECIFIED
Date:1 November 2014
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:102
DOI :10.1016/j.pss.2014.03.006
Page Range:pp. 45-50
Publisher:Elsevier
Series Name:Planetary and Space Science
ISSN:0032-0633
Status:Published
Keywords:Phobos, Control points, Rotation, Libration
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt MARS-EXPRESS / HRSC
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Deposited By: Wählisch, Marita
Deposited On:07 Jan 2015 10:26
Last Modified:08 Mar 2018 18:48

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