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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2011, Vol. 8, No. 2, pp. 281-288

Algorithm for autonomous landing site selection of the Phobos-Grunt spacecraft

B.S. Zhukov , S.B. Zhukov 
Space Research Institute, 117997 Moscow, 84/32 Profsoyuznaya str
The landing of the Phobos-Grunt s/c on the surface of Phobos will be supported by real-time processing of the images obtained by the Wide-Angle Camera (WAC) of the Television System for Navigation and Observation (TSNN). In particular, a surface non-homogeneity map will be generated that will be used to estimate suitability for landing of the currently forecasted site and in case it proves unsuitable to direct the s/c to the most flat site in the WAC field of view. The relative radiance dispersion is chosen as the principal non-homogeneity criterion, with additional accounting for shadows and proximity of strong non-homogeneities. The map computation time on camera processors is approximately 0,1 s. The algorithm and the on-board software were tested using high-resolution images of Phobos, Mars and the Moon, as well as of specially designed rough surfaces.
Keywords: Phobos-Grunt mission, landing on Phobos, TSNN, on-board image processing, surface non-homogeneity map
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