You are here: older Versions  

OLDER VERSIONS

SCIATRAN 2.1

A solar occultation mode is added alowing the modelling of the solar/lunar radiation transmitted through the Earth's atmosphere.
Retrieval block is included in the software package which can be used to derive a variety of atmospheric parameters from the measurement of the scattered or transmitted solar radiation. Note: some of retrieval modes require the NAG FORTRAN Library (commercial).
Multiple viewing angles and solar zenith angles are now allowed in the discrete ordniate mode.
A new adaptive altitude grid can be used in the discrete ordniate mode resulting in a substantial reduce of the calculation time without a considerable loss of the accuracy.
Aerosol extinction and absorption coefficients as well as asymmetry coefficients for aerosol phase function (Heyney-Greenstein type) can be specified manually.



 
Download SCIATRAN 2.1.6
SCIATRAN 2.1 user´s guide



SCIATRAN 2.0

The program is written in FORTRAN 95.
Spherical mode added (can be used for solar zenith angles up to 98 deg). User can switch between the pseudo-spherical and the spherical mode.
All viewing geometries supported (nadir, off-nadir, zenith-sky, off-axis, limb).
Any observer position supported (TOA, BOA, any point within and above the atmosphere).
Field of view integration in spherical mode (at the moment for SCIAMACHY instrument in limb mode only).
Extended spectral region: 175 - 2400 nm.
Spectral data base for line absorbers (including c-k distribution scheme) is updated to HITRAN 2000.
Photochemically active species can be considered in spherical mode.
New radiative transfer core in pseudo-spherical mode (based on discrete-ordinates method).
Extremely fast quasi-asymptotical approach to calculate reflected radiance in a cloudy atmosphere within line-absorber (O2, H2O, etc.) spectral bands.
Linearization (weighting functions) with respect to trace gas concentrations in spherical mode and with respect to all atmospheric parameters (trace gas concentrations, pressure, temperature, Rayleigh scattering, aerosol and cloud parameters) in pseudo-spherical mode.
Incorporated retrieval block based on either Optimal Estimation or Information Operator approach (alternatively).
Parallel computation on SMP systems (Open MP standard).



 
Download SCIATRAN 2.0.15
SCIATRAN 2.0 user´s guide



SCIATRAN 1.2

SCIATRAN is a radiative transfer program developed at the Institute of Remote Sensing (ife) / Institute of Environmental Physics ( iup), University of Bremen, Bremen, Germany.
SCIATRAN Version 1.2 is an extension of the GOMETRAN radiative transfer model.
SCIATRAN has been developed in FORTRAN 77 on a SUN Ultra Sparc workstation under Solaris 2.x. SCIATRAN has also been tested on the University of Bremen FB1 CRAY J916 supercomputer running UNICOS, and on a DEC Alpha station running OpenVMS AXP (TM) V6.1. Nevertheless, ife/iup cannot make any warranties that the program is free of errors.
SCIATRAN has been designed to allow fast and accurate simulation of radiance spectra as measured or expected to be measured from space with the passive remote sensing UV-Vis-NIR spectrometers GOME (Global Ozone Monitoring Experiment) [12] (spectral range: 240-790 nm; viewing mode: nadir) and SCIAMACH [5] (240-2400 nm; nadir, limb, solar and lunar occultation). GOME has been successfully launched onboard ESA's satellite ERS-2 in April 1995. Further details concerning GOME and SCIAMACHY can be found on our web-site. SCIATRAN is designed to be the forward model for retrieval of atmospheric constituents from GOME/SCIAMACHY satellite data.



 

Simulated SCIAMACHY sun-normalized radiance measurement in nadir mode as calculated with SCIATRAN (correlated-k (c-k) mode; after convolution with 0.3 nm FWHM Gaussian slit function). Scenario: U.S. Standard Atmosphere, multiple scattering, solar zenith angle 60o, albedo 0.1, tropospheric maritime and stratospheric background aerosol, no clouds. Top: The strong decrease of the intensity below 300 nm is due to ozone absorption. The remaining features are due to oxygen and water vapor absorption. Middle: strong CO2 absorption band with overlapping H2O absorption.

Registration SCIATRAN 1.2

The radiative transfer model SCIATRAN is free to have for scientific usage. The form of the licensing conditions for the radiative transfer code SCIATRAN is given here. You can either print out the HTML-Version of this file with your browser or you download the Postscript- or PDF-File and print it:
HTML-Format
Postscript-Format (Download the document: 90kB)
PDF-Format (Download the document: 190kB)
If you want to use SCIATRAN for scientific purposes, please return the agreement via mail. You can then download the program and the corresponding databases via FTP. We supply you with the necessary information on where to get the program (ftp-address, login name, password, and paths) via email. Our address is:
Institute of Environmental Physics (IUP)
Dept. of Physics and Electrical Engineering, FB1
P.O. Box 330440
D-28334 Bremen
Germany
Attention: SCIATRAN



 
SCIATRAN working group
Institute of Environmental Physics (IUP)
Unversity of Bremen, Germany