Observing Systems Capability Analysis and Review Tool
Satellite Programme: Global Precipitation Measurement mission
Constellation of a "core observatory" equipped with both active and passive MW sensors, and several "constellation satellites" equipped with passive MW, to provide follow-on to TRMM for measuring global precipitation.
The core observatory is a joint NASA/JAXA undertaking: NASA responsible of the platform, the passive MW radiometer and operations, JAXA responsible of the precipitation radar and the launch service.
The constellation satellites are provided by several MW-equipped satellites, e.g. Megha-Tropiques, as well as operational meteorological satellites.
The platforms are actively stabilised over 3 axes.
The design life time is 3 years for the core observatory, 5 years for the constellation satellites.
The satellites exploit drifting orbits: the core observatory with high-inclination, the constellation satellites with low-inclination for frequent observation of tropical regions.
See detailed description at
The data of the core observatory are transmitted through the TDRSS (Tracking and Data Relay Satellite System). A NASA Mission Operations Center (MOC) conveys the data to a Precipitation Processing System (PPS) located at the Goddard Space Flight Center (GSFC).
The data of the constellation satellites are stored onboard and downlinked to a network of S-band stations of the responsible agencies.
2014 - 2020
Associated satellites and instruments
Note: red tag => no longer operational , green tag => operational , blue tag => planned
Global Precipitation Measurement mission
GPM Core Observatory
(2014 - 2020)