NASA Global Precipitation Measurement Mission

Micro rain radar ground station in Stornoway at Lews Castle College

GPM is an international satellite mission that uses multiple satellites orbiting Earth to collect rain, snow and other precipitation data worldwide every three hours. On February 27th, 2014, NASA and the Japan Aerospace Exploration Agency (JAXA) launched a Core Observatory satellite carrying advanced instruments that improve our precipitation-measuring capabilities and bring all the data from the partner satellites into a unified global dataset.