Snow-Tools Signature Database
The Snow-Tools snow signature database is based on the review , the starting point was  and , and complemented by additional work. We analyzed in particular the signatures obtained from in-situ and airborne measurements. Spaceborne campaigns are considered only if extensive ground-information was collected simultaneously and if atmospheric influence was addressed. A review of models was also accomplished, with the goal to identify the signature measurements used to validate the models.
 Hiltbrunner D., Strozzi T., Mätzler C., Standley A., 1997: "Identification of electromagnetic signatures and data gaps of snow related to microwave and optical measurements". Snow-Tools Technical Report WP 310, Contract No. ENV4-CT96-0304. <pdf-version>
 Weise T., 1993: "Millimeter-Wave Signature Studies of Natural Surfaces and Objects: A Literature Survey". Report on Behalf of GR, IAP, University of Bern.
 Ulaby F.T. and Dobson M.C., 1989: "Handbook of Radar Scattering Statistics for Terrain". Artech House Inc., Norwood, MA.