Our data for Precipitation Rate / JAXA is based on the data from G-Portal by JAXA. This page purposes to explain detailed information for the downloadable data.
Example Dataset
Please download a free example dataset and use it in you app or analysis.
URL Expiration
All downloadable URLs expire in 90 days after your order.
Frequency and Update
The frequency is hourly. Generally, the latest data is updated within 1-2 hours after the JAXA data becomes available in G-Portal. The data version is 8. Note that, because of using the different version, the value of the precipitation rate on JAXA Realtime Rainfall Watch is different from the value on this data. As of September 2th, 2024, the data version used in JAXA Realtime Rainfall Watch is 6. According to JAXA, the version 8 is more accurate, compare to the older version appeared on the application by JAXA.
Data Format
The default format is csv where no single/double quotation marks are used in the file. The rows having only the value of time mean that the precipitation rates are not observed at the point. Also, the geojson format is available, changing the file extension in the provided url from “csv” to “geojson.” Note that the geometry of geojson format is Point.
Example
Column Names / Property Names
| Names | Description | Physical unit / classes | Physical min | Physical max |
| time | Datetime (UTC) | YYYY-MM-DD hh:mm:ss | – | |
| lat | Latitude | Decimal | -60 | 60 |
| lon | Longitude | Decimal | -180 | 180 |
| PrecipitationRate | Precipitation Rate | mm / h | 0 (-99, -8, -4) | – |
| gaugeQualityInfo | Number of rain gauge used in gauge adjustment at each pixel within one day. | counts / day | 0 | – |
| hourlyPrecipRateGC | Hourly rain rate at each pixel, calibrated by using ground-based gauge observation over land. | mm / h | 0 | – |
| observationTimeFlag | Relative time of latest microwave radiometer observation at each pixel | – | 0 (-999, < 0) | – |
| satelliteInfoFlag | All satellite/sensor which are used in estimation of rainfall at each pixel during one-hour time period. | – | 1 | 268435456 |
| snowProbability | The probability ratio of snow fall in percent. | % | 0 | 100 |
Further Details on Precipitation Rate / JAXA
For further details, concerns such as satellite sensors and data accuracy, please refer the document by JAXA.
https://sharaku.eorc.jaxa.jp/GSMaP/document/new/DataFormatDescription_NRT8.pdf