GOSAT-GW/AMSR3 L1R Brightness Temperature

  • DOI: 10.57746/EO.01hmszywcnb3m546cg43hd3p75
  • Last Updated: 2026-06-30
Data Progress: In Work
G-Portal

Product Summary

GOSAT-GW/AMSR3 L1R Brightness Temperature dataset is obtained from the AMSR3 sensor onboard GOSAT-GW and produced by the Japan Aerospace Exploration Agency (JAXA).
GOSAT-GW was launched by the H-IIA Launch Vehicle No. 50 (H-IIA 50) at 01:33 a.m. on Jun 29th, 2025 (Japan Standard Time, JST). GOSAT-GW equipped with AMSR3 takes measurements at multiple microwave frequencies and multiple polarizations of weak electromagnetic waves in the microwave band radiated from the Earth’s surface and the atmosphere. AMSR3 has swath of 1535 km and 11 microwave bands. The observation data will enable the creation of long-term trustworthy data sets of global physical amount.
Level 1 products are the antenna temperature count value (L1A) or the Brightness Temperature (L1B, L1R, L1C and L1H).
This product includes resampled brightness tempearture. Level 1R product stores the brightness temperature that is spatially resampled from Level 1B to match the center position of the FOV of each frequency band at each pixel. Resampling takes place by overlaying the original brightness temperature data with weighted parameters (resampling coefficients) calculated using the Backus-Gilbert Method. The center latitude and longitude of data is adjusted to the 89 GHz A channel receiver data.
The provided format is NetCDF4. The current version of the product is Version 01A. The physical quantity unit is Kelvin. The generation unit is scene (defined as a half orbit). The sampling resolution is 5-50 km.

Platform
GOSAT-GW
Sensor
AMSR3

Coverage

Temporal Coverage

2025-08-11 to Present

Spatial Coverage

Bounding Rectangle

Resolution

5-50 km

Location

  • GEOGRAPHIC REGION > GLOBAL
Dataset Short Name
GOSAT-GW_AMSR3_L1R_TB
Platform / Sensor
GOSAT-GW / AMSR3
Coverage
Spatial Coverage
Bounding Rectangle
Temporal Coverage
2025-08-11 to Present
Product Level ID
L1R
Version Description

Version 01A, 2026-06-30, Available

File Format
NetCDF4
Dataset Type
None / Scene
Resolution
Spatial Resolution
5-50 km
Temporal Resolution
None
Dataset Progress
In Work
Projection
None
Collection Data Type
SCIENCE_QUALITY
Get Data
https://gportal.jaxa.jp/gpr/?lang=en
Dataset Title
GOSAT-GW/AMSR3 L1R Brightness Temperature
Distribution Format
NetCDF4
Fees
Free
Citation
Japan Aerospace Exploration Agency. 2025. GOSAT-GW/AMSR3 L1R Brightness Temperature. https://doi.org/10.57746/EO.01hmszywcnb3m546cg43hd3p75
Access Constraints

No constraints but users need to be registered with the G-Portal User Registration system to download files.

Use Constraints

The users are entitled to use, reprocess and redistribute G-Portal data including commercial use for free except for the condition about acknowledgement of data credit as stipulated in G-Portal terms of use 7.(2).

Click here for detailed G-Portal data usage constrains.

G-Portal Terms of service
https://gportal.jaxa.jp/gpr/index/eula?lang=en
ISO Topic Categories
  • IMAGERY/BASE MAPS/EARTH COVER
  • GEOSCIENTIFIC INFORMATION
Science Keywords
  • EARTH SCIENCE > SPECTRAL/ENGINEERING > MICROWAVE > BRIGHTNESS TEMPERATURE
Location Keywords
  • GEOGRAPHIC REGION > GLOBAL
ECV and other Keywords
  • SPECTRAL/ENGINEERING
  • MICROWAVE
  • BRIGHTNESS TEMPERATURE

ISO Topic Categories is the keywords in the ISO 19115 - Geographic Information Metadata.

Science Keywords hosts Global Change Master Directory (GCMD) Keywords which are a hierarchical set of controlled Earth Science vocabularies that help ensure Earth science data, services, and variables are described in a consistent and comprehensive manner and allow for the precise searching of metadata and subsequent retrieval of data, services, and variables.

ECV Keywords hosts a physical, chemical or biological variable or a group of linked variables that critically contributes to the characterization of Earth's climate.

Date Description of Change
2026-06-30 Published and assigned a DOI.