Global Satellite Mapping of Precipitation (GSMaP) provides a global hourly rain rate with a 0.1 x 0.1 degree resolution. GSMaP is a product of the Global Precipitation Measurement (GPM) mission, which provides global precipitation observations at three hour intervals. Values are estimated using multi-band passive microwave and infrared radiometers from the GPM Core Observatory satellite and with the assistance of a constellation of other satellites. GPM’s precipitation rate retrieval algorithm is based on a radiative transfer model. The gauge-adjusted rate is calculated based on the optimization of the 24h accumulation of GSMaP hourly rain rate to daily precipitation by NOAA/CPC gauge measurement. This dataset is processed by GSMaP algorithm version 6 (product version 3). See GSMaP Technical Documentation for more details.
The operational GSMaP dataset (from 2014 to present) is also provided as JAXA/GPM_L3/GSMaP/v6/operational.
|hourlyPrecipRate||Snapshot of hourly precipitation rate|
|hourlyPrecipRateGC||Snapshot of hourly precipitation rate adjusted to rain gauge|
|observationTimeFlag||Relative time from the starting time of the file to the time of microwave radiometer (imager/sounder) observing. If no observation exists within the hourly window, the time will be the negative number of hours since the last observation.|
|gaugeQualityInfo||Existence of gauge adjustment when the status is 'provisional', 1 indicates adjusted and 0 is non-adjusted. When the status is 'permanent', the pixel value is the daily average of number of gauges used for adjustment in the pixel.|
|JAXA Earth Observation Research Center (producer, licensor)|
|Google Earth Engine (host)|
|Keywords||climate, geophysical, gpm, hourly, jaxa, nasa, precipitation, weather|
|Temporal Extent||2/29/2000, 4:00:00 PM - 3/11/2014, 5:00:00 PM|
|Citation||K. Okamoto, T. Iguchi, N. Takahashi, K. Iwanami and T. Ushio, 2005: The global satellite mapping of precipitation (GSMaP) project, 25th IGARSS Proceedings, pp. 3414-3416.|