EOSPEC: a complementary toolbox for MODTRAN calculations


  1. Dion, D.
Corporate Authors
Defence Research and Development Canada, Valcartier Research Centre, Quebec QC (CAN)
For more than a decade, Defence Research & Development Canada (DRDC) has been developing a Library of computer models for the calculations of atmospheric effects on EO-IR sensor performances. The Library, called EOSPEC-LIB (EO-IR Sensor PErformance Computation LIBrary) has been designed as a complement to MODTRANTM, the radiative transfer code developed by the Air Force Research Laboratory and Spectral Science Inc. in the USA. The Library comprises modules for the definition of the atmospheric conditions, including aerosols, and provides modules for the calculation of turbulence and fine refraction effects. SMART (Suite for Multi-resolution Atmospheric Radiative Transfer), a key component of EOSPEC, allows one to perform fast computations of transmittances and radiances using MODTRAN through a wide-band correlated-k computational approach. In its most recent version, EOSPEC includes a MODTRAN toolbox whose functions help generate in a format compatible to MODTRAN 5 and 6 atmospheric and aerosol profiles, user-defined refracted optical paths and inputs for configuring the MODTRAN sea radiance (BRDF) model. The paper gives an overall description of the EOSPEC features and capacities. EOSPEC provides augmented capabilities for computations in the lower atmosphere, and for computations in maritime environments.
radiative transfer;EO-IR propagation;atmospheric refraction effects;atmospheric turbulence effects
Report Number
DRDC-RDDC-2018-N017 — External Literature
Date of publication
01 Mar 2018
Number of Pages
Reprinted from
Proceedings Volume 9979, Laser Communication and Propagation through the Atmosphere and Oceans V. San Diego, California, United States. 9979
Electronic Document(PDF)

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