COVERAGE AND POINTING ACCURACY OF SMART-1/AMIE IMAGES B. Grieger, B.H. Foing, D. Koschny, J.-L. Josset, S. Beauvivre, D. Frew, M. Almeida, M. Sarkarati, J. Volp, P. Pinet, S. Chevrel, P. Cerroni, M.C. de Sanctis, M.A. Barucci, S. Erard, D. Despan, K. Muinonen, V. Shevchenko, Y. Shkuratov, M. El- louzi, S. Peters, M. Grande, J. Huovelin, A. Nathues, A. Malkki, G. Noci, B. Kellett, A. C. Cook, D. Heather, J.Zender, P. McMannamon, G. Schwehm, O. Camino, R. Blake, and SMART1 Operations and Science Technology Working Teams, ESTEC/SCI-S, postbus 299, 2200 AG Noordwijk, NL, Europe, (Bjoern.Grieger@esa.int) Summary: The SMART-1 spacecraft started from 15 March 2005 with a lunar orbit 400-3000 km for a nominal science period of six months, with 1 year science extension. During these 18 months, the AMIE camera aboard the space- craft acquired about 32.000 images. We report on the cover- age at various resolutions and the pointing accuracy. Lunar coverage The SMART-1 spacecraft [1-5] operated in an eccen- tric polar orbit with the perilune close to the South pole. Therefore the highest resolution was achieved in the South polar area. The AMIE experiment [5-8] allowed imag- ing at varying resolution along the orbit. Fig. 1 shows the footprints of all images with a resolution better than 50 me- ters per pixel. With such a high resolution, the small but scientifically quite interesting area south off 87S and various spots in the southern hemisphere are covered. If we relax the lower resolution limit to 100 meters per pixel, the covered area extends to the complete Southern hemisphere, cf. Fig. 2. Finally, global coverage is achieved with a resolution better than 250 meters per pixel, as shown in Fig. 3. Fig. 1: Lunar coverage obtained with AMIE camera at a resolution better than 50 meters per pixel. ig. 2: Lunar coverage obtained with AMIE camera a resolution better than 100 meters per pixel. ased on the SPICE kernels for the SMART-1 space- can be used project the AMIE images onto the Moon's surface. he Moon was only conducted for one single, ore or less randomly selected image. For other im- image to the Clementine ase map, we visualize the base map in simple (equi- F at Fig. 3: Lunar coverage obtained with AMIE camera at resolution better than 250 meters per pixel. a Offsets from the Clementine base map B craft and for the AMIE instrument, SPICE to As reference for the AMIE images, the AMIE team uses the Clementine base map, which has been com- piled by the USGS from images taken by the Clementine spacecraft. AMIE team members had re- ported considerable offsets between the AMIE images and the Clementine base map. These offsets had at least partly been caused by erroneous preliminary ver- sions of the instrument frame kernel. A new kernel was prepared by ESA Science Operations and thor- oughly tested. The kernel passed successfully various tests, also the projection of an image onto the Moon's surface and a comparison with the Clementine base map. However, the particular test of projecting an image onto t m ages, AMIE team members saw still offsets from the Clementine base map, even with the new kernel. Also at ESA Science Operations, where many images have been compared with the Clementine base map in the course of checking the timing of the images, consider- able offsets have been found. We have computed latitude and longitude of each pixel of 395 images. To match the b distant) cylindrical projection and overlay the AMIE Lunar and Planetary Science XXXIX (2008) 2221.pdf