GPM will be an international fleet of satellites that provide global observations of rain and snow. Based on the Tropical Rainfall Measuring Mission (TRMM), GPM will consist of a core spacecraft that includes radar and radiometers that will provide reference standards to unify the other observations made by the rest of the fleet. More information on GPMis available.
This visualization is the first of three designed to illustrate some aspects of the GPM mission. This one shows the GPM spacecraft fleet orbiting the Earth. This version is capable of being shown on a hyperwall that is a set of tiled displays.
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