SASKTRAN-DO is an extension module for the SASKTRAN radiative transfer model which contains a Discrete-Ordinates model. Configuring the geometry and atmosphere are described in the main SASKTRAN documentation page (, aspects specific to SASKTRAN-DO are described here.

We would recommend starting with the quickstart guide, and then go straight into looking at some examples.


SASKTRAN-DO is made available under the MIT license restricted for academic and educational use, for commercial use please contact the package authors. Commerical level support may also be available for specific applications. We request that users of the model contact the authors before publishing results using SASKTRAN, and that the following publications are acknowledged:

Zawada, D. J., Dueck, S. R., Rieger, L. A., Bourassa, A. E., Lloyd, N. D., and Degenstein, D. A.: High-resolution and Monte Carlo additions to the SASKTRAN radiative transfer model, Atmos. Meas. Tech., 8, 2609-2623,, 2015.

Bourassa, A. E., Degenstein, D. A., and Llewellyn, E. J.: SASKTRAN: A Spherical Geometry Radiative Transfer Code for Efficient Estimation of Limb Scattered Sunlight, J Quant Spectrosc Radiat Trans, Volume 109, Issue 1, 52-73,, 2008.


Inquiries and bug reports can be sent to Daniel Zawada (


Indices and tables