Mars Global Reference Atmospheric Model 2001 Version Mars Gram 2001 Users Guide Nasa Tm 2001 210961 Aug 16 2001

MARS GLOBAL REFERENCE ATMOSPHERIC MODEL 2001 VERSION (MARS-GRAM 2001): USERS GUIDE... NASA/TM-2001-210961... AUG. 16, 2001

43rd AIAA Aerospace Sciences Meeting & Exhibit

Mars Global Reference Atmospheric Model 2001 Version (Mars-Gram 2001)

This document presents Mars Global Reference Atmospheric Model 2001 Version (Mars-GRAM 2001) and its new features. As with the previous version (mars-2000), all parameterizations fro temperature, pressure, density, and winds versus height, latitude, longitude, time of day, and season (Ls) use input data tables from NASA Ames Mars General Circulation Model (MGCM) for the surface through 80-km altitude and the University of Arizona Mars Thermospheric General Circulation Model (MTGCM) for 80 to 70 km. Mars-GRAM 2001 is based on topography from the Mars Orbiter Laser Altimeter (MOLA) and includes new MGCM data at the topographic surface. A new auxiliary program allows Mars-GRAM output to be used to compute shortwave (solar) and longwave (thermal) radiation at the surface and top of atmosphere. This memorandum includes instructions on obtaining Mars-GRAN source code and data files and for running the program. It also provides sample input and output and an example for incorporating Mars-GRAM as an atmospheric subroutine in a trajectory code.Justus, C. G. and Johnson, D. L.Marshall Space Flight CenterMARS ATMOSPHERE; ATMOSPHERIC GENERAL CIRCULATION MODELS; MARS SURFACE; PARAMETERIZATION; ATMOSPHERIC MODELS; ATMOSPHERIC CIRCULATION; TOPOGRAPHY; THERMOSPHERE; LONG WAVE RADIATION; TRAJECTORIES