SEE PRODUCTS / SEE Related Model & DB -
Ionosphere and
Thermosphere (Solar and Thermal Environment)
MARS GLOBAL REFERENCE ATMOSPHERIC
MODEL (Mars-GRAM 2010)
Description:
Mars Global Reference Atmospheric Model (Mars-GRAM) is an
engineering-level atmospheric model, widely used for diverse
mission applications. Applications include systems design,
performance analysis, and operations planning for
aerobraking, entry descent and landing, and aerocapture.
From 0-80 km altitude, Mars-GRAM is based on NASA Ames Mars
General Circulation Model (MGCM), while above 80 km it is
based on Mars Thermospheric General Circulation Model (MTGCM).
Mars-GRAM and MGCM use surface topography from Mars Global
Surveyor Mars Orbiting Laser Altimeter (MOLA), with
altitudes referenced to the MOLA constant potential surface
(areoid).
Additional Information:
Language: FORTRAN 90/95
Operating System: PC/DOS, Unix
Hardware Requirements: Runs on PC (or compatible) and on
most Unix hardware
Availability:
- Maintenance/ Upgrades: On an
as needed basis
- Source Code: Source code is
available
-
Cost:
Program: No cost to qualified, NASA approved users
- Distribution:
Contact Hilary Justh (contact information below)
- Manuals: Yes
- Training: No
Input Description: Geographic position and time.
Output Format: Density, temperature, pressure, winds, and
selected atmospheric constituents.
Verification/ Validation:
Mars-GRAM 2005 was validated against Radio Science data, and
both nadir and limb data from the Thermal Emission
Spectrometer (TES). Adjustment
factors have been implemented in Mars-GRAM 2010 to produce
significant improvement
in match up with TES limb data (0-60 km) and aerobraking
data from MGS, Odyssey, and
MRO (90-130 km). These adjustment factors apply for the "MapYear=0"
option (where
user-specified dust optical depth is employed).
Point of
Contact:
Hilary L.
Justh
EV44/NASA
NASA Marshall Space Flight Center
MSFC, AL 35812
Phone: (256) 544-3694
E-mail:
Hilary.L.Justh@nasa.gov
back to SEE Products -
Ionosphere
and Thermosphere |