GPM Care DataEntry ID: GPM_core_JAXA
Abstract: The GPM core satellite, which is being developed jointly by Japan and the U.S., is scheduled to be launched in 2013. The core satellite carries a Dual-frequency Precipitation Radar (DPR) developed by Japan, and a GPM Microwave Imager (GMI) developed by the U.S. The orbit of the core satellite is non-sun-synchronous with an inclination angle of about 65 degrees. This orbit was selected to meet ... certain requirements, such as to measure diurnal variation of rainfall in mid- and high-latitudes as well as the tropics over 2 months.
The DPR consists of two radars: a PR-type precipitation radar with a frequency of 13.6-GHz, and a 35.5-GHz precipitation radar that was added to improve the sensitivity and accuracy of measurement. The GMI will be an improved model of the TRMM Microwave Imager (TMI), and carries four high-frequency channels about 166-GHz and 183-GHz in addition to nine microwave channels available in TMI.
The 13.6-GHz channel of the DPR has a swath width of about 245 km, and the 35.5-GHz channel observes a swath width of about 100 km. In the overlapping area, measurements will be performed synchronously. The GMI scans its antenna conically with a swath width of about 800 km.
The roles of the GPM primary satellite are to collect as much microphysical information as possible for accurate rain estimation by performing synchronous observation with the GMI and the DPR, and to provide calibration standards for the other microwave radiometers on the constellation satellites.
Data Set Citation
Dataset Originator/Creator: JAXA
Dataset Title: GPM Care Data
ISO Topic Category
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2012-05-18
Last DIF Revision Date: 2016-01-27