Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of Mars

Citation
De. Smith et al., Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of Mars, J GEO R-PLA, 106(E10), 2001, pp. 23689-23722
Citations number
211
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Space Sciences
Journal title
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
ISSN journal
2169-9097 → ACNP
Volume
106
Issue
E10
Year of publication
2001
Pages
23689 - 23722
Database
ISI
SICI code
0148-0227(20011025)106:E10<23689:MOLAES>2.0.ZU;2-C
Abstract
The Mars Orbiter Laser Altimeter (MOLA), an instrument on the Mars Global S urveyor spacecraft, has measured the topography, surface roughness, and 1.0 64-mum reflectivity of Mars and the heights of volatile and dust clouds. Th is paper discusses the function of the MOLA instrument and the acquisition, processing, and correction of observations to produce global data sets. Th e altimeter measurements have been converted to both gridded and spherical harmonic models for the topography and shape of Mars that have vertical and radial accuracies of similar to1 m with respect to the planet's center of mass. The current global topographic grid has a resolution of 1/64 degrees in latitude x 1/32 degrees in longitude (I x 2 km(2) at the equator). Recon struction of the locations of incident laser pulses on the Martian surface appears to be at the 100-m spatial accuracy level and results in 2 orders o f magnitude improvement in the global geodetic grid of Mars. Global maps of optical pulse width indicative of 100-m-scale surface roughness and 1.064- mum reflectivity with an accuracy of 5% have also been obtained.