Clear-Sky Models

Mueller R.W., Dagestad K.F., Ineichen P., Schroedter M., Cros S., Dumortier D., Kuhlemann R., Olseth J.A., Piernavieja G., Reise C., Wald L., Heinnemann D., 2004. Rethinking satellite based solar irradiance modelling - The SOLIS clear sky module. Remote Sensing of Environment, 91, 160-174.

Rigollier C., Bauer O., Wald L., 2000. On the clear sky model of the 4th European Solar Radiation Atlas with respect to the Heliosat method. Solar Energy, 68(1), 33-48.
See also Geiger M., Diabaté L., Ménard L., Wald L., 2002. A Web service for controlling the quality of global solar irradiation. Solar Energy, 73, 6, 475-480.