NASA’s SnowEx ground and airborne campaign is a multiyear effort using a variety of techniques to study snow characteristics, and the team concluded their second year in March 2020. Not only is SnowEx learning valuable information about how snow properties change by terrain and season, but they are also testing the tools NASA will need to sample snow from space.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 188.8.131.52.0