This animation shows GPM collecting data on March 17th over a large east coast snow storm. The animation begins with GPM collecting 37 GHz horizontally polarized brightness temperature data over the storm (in shades of aquamarine). All of GPM's 13 bands are then spread out to reveal the entire range of brightness temperature data. This data then collapses into precipitation rates for this storm. Frozen precipitation is shown in shades of blue (low amounts) to violet (high amounts), and liquid precipitation is represented in colors ranging from green (low amounts) to red (high amounts). As the camera pulls out, GPM continues traversing the globe showing precipitation rates for the remainder of the swath.
The Global Precipitation Measurement (GPM) Mission is a joint satellite mission between NASA and JAXA. GPM has the capability of differentiating between liquid and frozen precipitation. In this visualization we see a large east coast snow storm through the eyes of GPM.
Colorbar for liquid precipitation rates (ie, rain rates) in millimeters per hour. Shades of green represent low amounts of liquid precipitation, whereas shades of red represent high amounts of precipitation.
Colorbar for frozen precipitation rates (ie, snow rates) in millimeters per hour. Shades of cyan represent low amounts of liquid precipitation, whereas shades of purple represent high amounts of precipitation.
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