Data Format Description - Global Rainfall Map in Near-real-time Gauge-calibrated Rainfall Product (GSMaP_Gauge_NRT) Version 6 (GNRT6)

Sep 17, 2026

Data Format Description for Global Rainfall Map in Near-real-time Gauge-calibrated Rainfall Product (GSMaP_Gauge_NRT) Version 6 (GNRT6) distributed by JAXA Climate Rainfall Watch. It outlines GNRT6 scope, including the global domain and time coverage from 1 April 2000 to present, plus 25-year statistics and mean precipitation outputs. The document specifies product variants (daily to monthly), key parameters and units, spatial resolution and grid sizing, temporal resolution, FTP directory structures, file naming rules, and binary data format details such as little-endian ordering and gzip compression.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages30

Reading Time1 h 16 min

AccessFree to download

Product Overview

Table 1 Summary of GNRT6 Products

Daily Averaged Rain Rate (product (1))

Basic Information

FTP Directory Information

File Naming Rules

Data Format

Earth Observation Research Center (EORC), Japan Aerospace Exploration Agency (JAXA) 25 September 2025 Data Format Description for Global Rainfall Map in Near-real-time Gauge-calibrated Rainfall Product (GSMaP_Gauge_NRT) Version 6 in JAXA Climate Rainfall Watch This document describes data format and information of Global Rainfall Map in Near-real-time Gauge-calibrated Rainfall Product (GSMaP_Gauge_NRT) for product version 6 (hereafter, GNRT6) distributed from JAXA Climate Rainfall Watch. Since 2007, GSMaP (Global Satellite Mapping of Precipitation) project activities are promoted by the JAXA Precipitation Measuring Mission (PMM) Science Team. The data period of GNRT6 is currently from 1 April 2000 to present and the statistical values over 25-years and mean precipitation over a specific period from daily to monthly are also available. Earth Observation Research Center (EORC), Japan Aerospace Exploration Agency (JAXA) 1. Product Overview Table 1 Summary of GNRT6 Products | No | | Parameter [unit] | Coverage & Grid size | Horizontal resolution | Temporal resolution | FTP directory | Section | | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | Daily Averaged Rain Rate [mm/hr] | | Global
(60°N-60°S)
3600 x 1200 | 0.1 x 0.1 degree grid box | 1-day | /climate/gnrt6/daily/ YYYYMM/ | See Section 2 | | 2 | 3-days Averaged Rain Rate [mm/hr] | | | | 3-days | /climate/gnrt6/3days /YYYYMM/ | See Section 3 | | 3 | Pentad Averaged Rain Rate [mm/hr] | | | | 5-days | /climate/gnrt6/pentad/YYYY/ | See Section 4 | | 4 | Weekly Averaged Rain Rate [mm/hr] | | | | 7-days | /climate/gnrt6/weekly/YYYYMM/ | See Section 5 | | 5 | 10-days Averaged Rain Rate
[mm/hr] | | | | 10-days | /climate/gnrt6/10days/YYYY/ | See Section 6 | | 6 | Monthly
Averaged Rain
Rate [mm/hr] | | | | monthly | /climate/gnrt6/monthly/YYYY/ | See Section 7 | | 7 | Daily Climatology [mm/hr] | | | | 1-day | /climate/gnrt6/climo /daily/MMM/ | See Section 8 | | 8 | 3-days Climatology [mm/hr] | | | | 3-days | /climate/gnrt6/climo /3days/SMMDD_EMMDD/ | See Section 9 | | 9 | Pentad Climatology [mm/hr] | | | | 5-days | /climate/gnrt6/climo /pentad/SMMDD_EMMDD/ | See Section 10 | | 10 | Weekly Climatology [mm/hr] | | | | 7-days | /climate/gnrt6/climo /weekly/SMMDD_EMMDD/ | See Section 11 | | 11 | 10-days Climatology [mm/hr] | | | | 10-days | /climate/gnrt6/climo /10days/MMM/ | See Section 12 | | 12 | | Monthly Climatology [mm/hr] | | | monthly | /climate/gnrt6/climo /monthly/MMM/ | See Section 13 | Note: YYYY: 4-digit year, MM: 2-digit month, DD: 2-digit day, PP: 2-digit pentad. Earth Observation Research Center (EORC), Japan Aerospace Exploration Agency (JAXA) Table 1 Summary of GNRT6 Products (continued) | No | Parameter [unit] | Coverage & Grid size | Horizontal resolution | Temporal resolution | FTP directory | | Section | | --- | --- | --- | --- | --- | --- | --- | --- | | 13 | Percentage of Rainy Days in a month [%] | | | monthly | /climate/gnrt6/climo /monthly/MMM/ | See Section 14 | | | 14 | Percentiles of Daily Rain Rate [mm/hr] | Global
(60°N-60°S)
3600 x 1200 | 0.1 x 0.1 degree grid box | 1-day | /climate/gnrt6/climo /daily/MMM/ | See Section 15 | | | 15 | Percentiles of 3-days Rain Rate [mm/hr] | | | 3-days | /climate/gnrt6/climo /3days/SMMDD_EMMDD/
See Section 16 | | | | 16 | Percentiles of
Pentad Rain Rate [mm/hr] | | | 5-days | /climate/gnrt6/climo /pentad/SMMDD_EMMDD/ | See Section 17 | | | 17 | Percentiles of
Weekly Rain
Rate [mm/hr] | | | 7-days | /climate/gnrt6/climo /weekly/SMMDD_EMMDD/ | See Section 18 | | | 18 | Standardized
Precipitation Index for 1-month | Global
(60°N-60°S)
1440 x 480 | 0.25 x 0.25 degree grid box | 1-month | /climate/gnrt6/SPI/YYYY/ | See Section 19 | | | 19 | Standardized
Precipitation Index for 2-month | | | 2-month | | | | | 20 | Standardized
Precipitation Index for 3-month | | | 3-month | | | | | 21 | Dail

FAQs

What is the time coverage and domain of GNRT6 data?

GNRT6 covers global regions (60°N–60°S) and the data archived period runs from 1 April 2000 to present. The data latency is 1 day.

What are the key grid resolution and temporal resolution for the daily averaged rain rate product?

The daily averaged rain rate uses a 0.1° latitude/longitude grid (about 10 km at the equator) with a 24-hour average temporal resolution.

How are GNRT6 daily data files organized on the FTP server?

Daily average files are stored under /climate/gnrt6/daily/YYYYMM/. File names follow the pattern gsmap_gnrt6.YYYYMMDD.0.1d.daily.00Z-23Z.dat.

Sep 17, 2026

Upload by Taylor Morgan