1. Slide: 1 The first Moscow Solar System Symposium (1M-S3) >> Phobos Digital Terrain Model (DTM)and Coordinate Refinement for Phobos-Grunt Mission Support Phobos Digital Terrain Model (DTM) and Coordinate Refinement for Phobos-Grunt Mission Support K. Willner 1, J.Oberst 1,2, X. Shi 3, H. Hoffmann 2 1) Technische Universität Berlin, Department of Geodesy and Geoinformation Sciences, Berlin, Germany 2) German Aerospace Center (DLR), Institute of Planetary Research, Berlin-Adlershof, Germany 3) Shanghai Astronomical Observatory, Chinese Academy of Sciences

2. The first Moscow Solar System Symposium (1M-S3) >>Slide: 2 March 2010 flybys – HRSC / SRC images SRC image 7982 Nadir image 7982 SRC image 7937 Stereo 2 image 7926SRC image 7926Nadir image 7926

3. The first Moscow Solar System Symposium (1M-S3) >>Slide: 3 Flyby Data Orbits 7915,7926, 7937: Nadir, Stereo and Photometry channels Area covered reaches from Western rim of Stickney to approx. 230° West and from North Pole to Equator OrbitFlyby distance ND / S1 / S2 Resolution P1 / P2 Resolution 7915110 km4 m/pixel9 m/pixel* 7926287 km11 m/pixel24 m/pixel* 7937476 km19 m/pixel39 m/pixel Color channel resolutions 7948663 km 29 m/pixel 7959850 km 34 m/pixel (8 x binning) * used for DTM reconstruction

4. The first Moscow Solar System Symposium (1M-S3) >>Slide: 4 Image coverage March 2010 flybys Observation geometry was similar for all flybys Similar coverage and light conditions for all flybys Proposed landing site area of Phobos Grunt is covered and illuminated Nadir channel image orbit 7926

5. The first Moscow Solar System Symposium (1M-S3) >>Slide: 5 Landing Site DTM Result of DTM reconstruction – 100 m/pixel lateral resolution, relative point accuracy +/- 10m Control network published in EPSL serves as reference Landing site location as described in Basilevsky & Shingareva, 2010

6. The first Moscow Solar System Symposium (1M-S3) >>Slide: 6 Perspective View N

7. The first Moscow Solar System Symposium (1M-S3) >>Slide: 7 Properties of the Landing Area 2 x 2 degree grid shows gentle slopes within the landing area Almost flat terrain at landing site 1 Small slope at proposed landing site 2 Small number of craters in both proposed landing sites 1 2 Approx. Landing Sites Basilevsky & Shingareva, 2010 N

8. The first Moscow Solar System Symposium (1M-S3) >>Slide: 8 Effective Surface Acceleration Shi, X. et al., 2010

9. The first Moscow Solar System Symposium (1M-S3) >>Slide: 9 Effective Surface Acceleration - 2 Shi, X. et al., 2010

10. The first Moscow Solar System Symposium (1M-S3) >>Slide: 10 Coordinates of the Suggested Landing Sites Landing SiteLongitudeLatitude 1217.7°W15.5°N 2212.0°W21.5°N Coordinates refer to the coordinate frame defined by the control network (Willner et al., 2010) Coordinates have an accuracy of +/- 0.1° Coordinates refer to the coordinate frame defined by the control network (Willner et al., 2010) Coordinates have an accuracy of +/- 0.1°

11. The first Moscow Solar System Symposium (1M-S3) >>Slide: 11 Outlook Add further data and improve accuracy of DTM Image mosaic update (currently done) Map update Registration of color channel images to DTM Interpretation of multispectral images

12. The first Moscow Solar System Symposium (1M-S3) >>Slide: 12 Other Phobos Activities ISSI Workshop Series: Phobos and Deimos – After Mars Express, Before Phobos Grunt First Workshop, March 2010, next: April 2011. http://www.issibern.ch/teams/phobosdeimos/ Planned: Publication of a „Phobos Book “ WorkshopTeam: Jürgen Oberst (Coord.) Alexander T. Basilevsky Veronique Dehant Thomas C. Duxbury Robert A. Jacobson Martin Pätzold Carle M. Pieters Kira B. Shingareva Peter C. Thomas William Thuillot Alexander V. Zakharov

13. The first Moscow Solar System Symposium (1M-S3) >>Slide: 13 GETEMME, a Mission to Explore the Martian Satellites and the Fundamentals of Solar System Physics A proposal for an ESA Cosmic Vision M- Class Mission for launch in 2022 or 2020 Rendezvous with Deimos and Phobos, deploy Laser reflectors Monitor precise range from the spacecraft to Deimos, Phobos and Earth for 1 Mars year for studies of satellite dynamics and fundamental physics Comprehensive remote sensing of Deimos and Phobos Proposal Team: J ü rgen Oberst, Valery Lainey, Christophe Le Poncin-Lafitte (Coordinators); Stephan Ulamec, Jens Biele, Harald Hoffmann, Konrad Willner, Veronique Dehant, Pascal Rosenblatt, Alexander V. Zakharov; > 100 proposal supporters