GSMaP Operational: Global Satellite Mapping of Precipitation (JAXA/GPM_L3/GSMaP/v6/operational)
Version v6
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.
This dataset contains provisional products that are regularly replaced with updated versions when the data become available. The products are marked with a metadata property called ‘status’. When a product is initially made available, the property value is ‘provisional’. Once a provisional product has been updated with the final version, this value is updated to ‘permanent’.
GSMaP for the reanalysis data (from 2000 to 2014) is also provided as JAXA/GPM_L3/GSMaP/v6/reanalysis.
| Name | Description |
|---|---|
| satelliteInfoFlag | Satellite/sensor used |
| 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. |
Providers | |
|---|---|
| JAXA Earth Observation Research Center (producer, licensor) | |
| Google Earth Engine (host) | |
| STAC Version | 0.6.0 |
| Keywords | climate, geophysical, gpm, hourly, jaxa, nasa, precipitation, weather |
| License | proprietary |
| Temporal Extent | 2/28/2014, 4:00:00 PM - now |
| 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. |
| Type | image_collection |
| GSD | arc degreesm |
| Cadence | hour |
| Asset schema | {"name":"AlgorithmID","description":"The algorithm that generated this product, e.g., 3GSMAPH","type":"STRING"},{"name":"AlgorithmVersion","description":"The version of the algorithm that generated this product","type":"STRING"},{"name":"ProductVersion","description":"The data version assigned by the processing system","type":"STRING"},{"name":"GenerationDateTime","description":"The date and time this granule was generated","type":"STRING"},{"name":"StartGranuleDateTime","description":"The start time defining this granule","type":"STRING"},{"name":"StopGranuleDateTime","description":"The stop time defining this granule","type":"STRING"},{"name":"status","description":"Permanent or provisional","type":"STRING"} |