NDLI: Mars global reference atmospheric model 2000 version (mars-gram 2000): users guide

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Mars global reference atmospheric model 2000 version (mars-gram 2000): users guide

Content Provider	NASA Technical Reports Server (NTRS)
Author	James, B. F. Justus, C. G.
Copyright Year	2000
Description	This report presents Mars Global Reference Atmospheric Model 2000 Version (Mars-GRAM 2000) and its new features. All parameterizations for temperature, pressure, density, and winds versus height, latitude, longitude, time of day, and L(sub s) have been replaced by input data tables from NASA Ames Mars General Circulation Model (MGCM) for the surface through 80-km altitude and the University of Arizona Mars Thermospheric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 170 km. A modified Stewart thermospheric model is still used for higher altitudes and for dependence on solar activity. "Climate factors" to tune for agreement with GCM data are no longer needed. Adjustment of exospheric temperature is still an option. Consistent with observations from Mars Global Surveyor, a new longitude-dependent wave model is included with user input to specify waves having 1 to 3 wavelengths around the planet. A simplified perturbation model has been substituted for the earlier one. An input switch allows users to select either East or West longitude positive. This memorandum includes instructions on obtaining Mars-GRAM 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.
File Size	2280197
File Format	PDF
Language	English
Publisher Date	2000-05-01
Access Restriction	Open
Subject Keyword	Spacecraft Design, Testing And Performance Density Mass/volume Atmospheric Circulation Temperature Thermosphere Exosphere Atmospheric Models Trajectories Mars Atmosphere Perturbation Parameterization Longitude Pressure Tables Data Solar Activity Atmospheric General Circulation Models Subroutines Mathematical Models Wind Meteorology Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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