325 Broadway
An RT solution for absorbing atmosphere and
Boulder, CO 80303
Mie scattering from precipitation; very simple sur-
Phone: (303) 497-3310
face emissivity factors, with general user-speci-
fied (constant) bistatic scattering coefficient in-
clusion under development; as with RADTRAN,
Enhanced RADTRAN
polarimetric effects from precipitation are gener-
Features
ally lacking; aspherical hydrometeor formulation
Computes atmospheric attenuation and bright-
is under development; code usability: "Under-
ness temperature for typical atmospheric paths,
graduate students at Georgia Tech have been able
including effects of clear air, fog, cloud, and rain,
to obtain useful results from the model within a
with polarized surface emissivities.
few hours."
Comments
Source/contact
Refer to the discussion under Atmosphere, in
Professor Al Gasiewski
the Applications section.
Department of Electrical Engineering
Improvements by Atmospheric and Environ-
Georgia Institute of Technology
mental Research, Inc., of the 1979 Air Force Geo-
Atlanta, GA 30332-0250
physics Laboratory program; core treatment of
Phone: (404) 894-2934
gas and aerosol effects is solid; newer RT algo-
rithm treats multiple scattering from precipita-
Fung surface model
tion; the formulations of terrestrial surface effects
are very approximate; limited validation of re-
Features
cent enhancements; code documented, dissemi-
Integrated and facilitated surface scattering
nated, and supported; more extensive validation
model based on SPM, KA, or the integral equa-
is underway.
tion approach.
Contact/source
Comments
Dr. Vincent J. Falcone
Refer to the discussion under Scattering from
Geophysics Laboratory
Surfaces and Transitions, in Methods and Approaches
Air Force Systems Command
section.
United States Air Force
PC-oriented, user-friendly software and docu-
Hanscom AFB, MA 01731-5000
mentation under development; user inputs choices
Phone: (617) 377-4029
of rms height, correlation length, and possibly
correlation function, program displays results
Dr. Ronald G. Isaacs
compared with user input data; subject to param-
Atmospheric & Environmental
eter field limits of each technique; integral equa-
Research, Inc.
tion approach most permissive, requiring prima-
840 Memorial Drive
rily rms slope less than about 0.4.
Cambridge, MA 02139
Phone: (617) 547-6207
Source/contact
Professor Adrian Fung
University of Texas at Arlington
Gasiewski radiative
Arlington, TX 76019
transfer model
Phone: (817) 273-3422
Features
Computes brightness temperature and associ-
UPM surface model
ated statistics for planar stratified scattering at-
mospheres over specularly reflecting surfaces.
Features
Unified perturbation method producing com-
Comments
plete bistatic cross sections for E and H polariza-
Refer to the discussion under Atmosphere, in
tion; Gaussian and power law surface spectra are
the Applications section.
included so far, others are possible.
20
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