SAMM2, SHARC-4 and MODTRAN4 Merged (User's Manual)
Abstract
The SAMM2 (SHARC and MODTRAN Merged Code version 2) combines the capabilities of the Strategic High-Altitude Radiance Code, SHARC-4, and MODerate resolution TRANsmittance code, MODTRAN4. The code calculates atmospheric Infrared radiance and transmission over a 1 - 40 micrometer spectral region for arbitrary lines of sight (LOS) from the ground to 300 km altitude using an approximate line-by-line radiative transport (RT) algorithm capable of a fine spectral resolution of 0.001 cm-1. It models molecular emissions due to non-local thermodynamic equilibrium (NLTE) conditions at high altitudes (>50 km) and local thermodynamic equilibrium (LTE) conditions at lower altitudes (<50 km). This second version of SAMM has been upgraded to include single and multiple scattering effects by clouds and/or aerosols, which can be specified by the user via an interactive input menu. SAMM2 predicts atmospheric structure due to stochastic processes described by a temperature and density fluctuation model. The radiance statistics are non-stationary and are dependent on sensor bandpass, location and field of view (FOV). The code includes the ability to perform multiple LOS calculations during a single execution. Auxiliary atmospheric profile generator and slit function programs enhance the capabilities of the code. As in previous versions of the code, aurora regions can be embedded in quiescent atmospheres, the atmospheric terminator can be treated, and industry-standard kinetics and radiation transport modules have been employed. This manual outlines the scientific basis of the code, details steps for code installation and use as supplied, and indicates how the user may modify the supplied input files if desired.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 07, 2004
- Accession Number
- ADA427001
Entities
People
- A. Berk
- H. Dothe
- J. H. Gruninger
- J. W. Duff
- P. K. Acharya