The NASA/MSFC Global Reference Atmospheric Model - 1990 version (GRAM-90). Part 1. Technical/users manual.

Details The NASA/MSFC Global Reference Atmospheric Model - 1990 version (GRAM-90). Part 1. Technical/users manual. The NASA/MSFC Global Reference Atmospheric Model - 1990 version (GRAM-90). Part 1. Technical/users manual.

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ngr1.book.....j&link_type=abstract

The NASA/MSFC Global Reference Atmospheric Model - 1990 version (GRAM-90). Part 1. Technical/users manual., by Justus, C. G.; Al

Computer Science

1

Scientific paper

A new (1990) version of the NASA/MSFC Global Reference Atmospheric Model (GRAM-90) is presented and discussed. GRAM-90 incorporates extensive new data, mostly collected under the Middle Atmosphere Program (MAP), to produce a completely revised middle atmosphere model (20 to 120 km). The NASA Marshall Engineering Thermosphere (MET) model has also been incorporated into the GRAM-90 program, at all orbital altitudes greater than 120 km. Part I of this report serves as a technical description of the GRAM-90 program, with extensive documentation on the program operation and usage. Sample results are presented, in the form of height-latitude and latitude-longitude plots. Comparisons are made between the empirically based GRAM-90 model and results from a "first principles" stratospheric circulation model (SCM) in the 20- to 80-km height region. Specific areas of improvement of GRAM-90 over the earlier GRAM model results are also noted. A test case example is also included. For Part II see Abstr. 53.002.070.

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