The NOAA-N Prime satellite is slated for launch by NASA on February 4th, 2009. Operated by NOAA, N Prime will be the last in the Television Infrared Observation Satellite Series (TIROS) that have been observing Earth's weather and environment for nearly 50 years. N Prime's main role will be to provide continuity of service until the launch of the next generation, highly advanced National Polar-orbiting Operational Environmental Satellite System (NPOESS).
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 22.214.171.124.0