National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

SAMM2, SHARC-4 and MODTRAN4 Merged (User's Manual).

ADA427001

Publication Date	2004
Personal Author	Dothe, H.; Duff, J. W.; Berk, A.
Page Count	218
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.
Keywords	Computer programs Algorithms Radiative transfer Radiance Infrared radiation User manuals Thermodynamics Atmospheric temperature Equilibrium(General) Atmospheric scattering Transmittance Coding Atmosphere models Samm2 computer program Samm2(Sharc and modtran merged code version 2) Sharc4 computer program Sharc4(Strategic high altitude radiance code version 4) Modtran4 computer program Modtran4(Moderate resolution transmittance code version 4) Lte(Local thermodynamic equilibrium) Nlte(Non- local thermodynamic equilibrium) Rt(Radiation transport)
Source Agency	Non Paid ADAS
Corporate Authors	Spectral Sciences, Inc, Burlington, MA.
Supplemental Notes	The original document contains color images. All DTIC reproductions will be in black and white. Prepared in cooperation with Boston College, Chestnut Hill, MA.
Document Type	Technical Report
Title Note	Environmental research paper, no. 1260, Jun 2002-Jun 2004.
NTIS Issue Number	200505
Contract Number	F19628-02-C-0078

SAMM2, SHARC-4 and MODTRAN4 Merged (User's Manual).

SAMM2, SHARC-4 and MODTRAN4 Merged (User's Manual).
ADA427001

Publication Date	2004
Personal Author	Dothe, H.; Duff, J. W.; Berk, A.
Page Count	218
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.
Keywords	Computer programs Algorithms Radiative transfer Radiance Infrared radiation User manuals Thermodynamics Atmospheric temperature Equilibrium(General) Atmospheric scattering Transmittance Coding Atmosphere models Samm2 computer program Samm2(Sharc and modtran merged code version 2) Sharc4 computer program Sharc4(Strategic high altitude radiance code version 4) Modtran4 computer program Modtran4(Moderate resolution transmittance code version 4) Lte(Local thermodynamic equilibrium) Nlte(Non- local thermodynamic equilibrium) Rt(Radiation transport)
Source Agency	Non Paid ADAS
Corporate Authors	Spectral Sciences, Inc, Burlington, MA.
Supplemental Notes	The original document contains color images. All DTIC reproductions will be in black and white. Prepared in cooperation with Boston College, Chestnut Hill, MA.
Document Type	Technical Report
Title Note	Environmental research paper, no. 1260, Jun 2002-Jun 2004.
NTIS Issue Number	200505
Contract Number	F19628-02-C-0078