The Geostationary Operational Environmental Satellites (GOES) have the ability to not only monitor Earth's weather but also to recieve distress signals from victims. Currently, the Search and Rescue Satellite-Aided System SARSAT, developed by a NASA Goddard team, has saved more than 27,000 lives since its launch 30 years ago. The same team is now developing a new system, which will use a constellation of 24 GPS satellites to be able to pick up a distress signal and relay the victim's location precisely and almost instantly.
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 8.0.0.0.0