The Ionospheric Connection Explorer, or ICON, will study the frontier of space: the dynamic zone high in our atmosphere where Earth weather and space weather meet. In fall 2018, the mission launches on an Northrop Grumman (formerly Orbital ATK) Pegasus XL rocket from NASA's Kennedy Space Center in Florida.
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