page_title: Global Precipitation Measurement
section_title: GPM Core Observatory Instruments
hierarchical_section_title: Global Precipitation Measurement / GPM Core Observatory Instruments
caption_attribution_description: English: The GPM Core Observatory completed the EMI/EMC test at Goddard Space Flight Center in May 2013.
context_page_description: Global Precipitation Measurement is a joint mission between JAXA and NASA as well as other international space agencies to make frequent observations of Earth's precipitation. It is part of NASA's Earth Systematic Missions program and works with a satellite constellation to provide full global coverage. The project provides global precipitation maps to assist researchers in improving the forecasting of extreme events, studying global climate, and adding to current capabilities for using such satellite data to benefit society. GPM builds on the notable successes of the Tropical Rainfall Measuring Mission, which was also a joint NASA-JAXA activity.
  The project is managed by NASA's Goddard Space Flight Center, and consists of a GPM Core Observatory satellite assisted by a constellation of spacecraft from other agencies and missions. The Core Observatory satellite measures the two and three dimensional structure of Earth's precipitation patterns and provides a new calibration standard for the rest of the satellite constellation.
caption: The GPM Core Observatory in the electromagnetic testing chamber at NASA Goddard Space Flight Center in March 2013. The silver disc and drum (center) is the GPM Microwave Imager, and the large block on the base is the Dual-frequency Precipitation Radar.
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