Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p21a0363n&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #P21A-0363
Physics
1229 Reference Systems, 1243 Space Geodetic Surveys, 5464 Remote Sensing, 5494 Instruments And Techniques
Scientific paper
More than 72,000 laser ranges to the Moon, 16 million to the asteroid 433 Eros, and 600 million to Mars have provided the cartographic context for future exploration. In the case of Mars, the accuracy of geolocated and crossover-corrected Mars Orbiter Laser Altimeter approaches 1 m vertically and 100 m horizontally, while Eros is known at best to 10 m. Our nearest neighbor is by far the least accurately measured topographically, owing in part to the lack of altimetric crossovers. We present advances in the registration of altimetric profiles and images on Mars and Eros. In the former case, pointing knowledge is the limiting factor, while for the NEAR-Shoemaker spacecraft, orbital knowledge was uncertain. Incorporation of altimetry in the orbit determination step improves both data kinds. Photometry, as implemented in the MOLA instrument and the Mercury Laser Altimeter to be flown on MESSENGER, provides an addditional geometric constraint.
Lemoine Frank G.
Neumann Gregory A.
Torrence Mark H.
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