GOSAT-GW/AMSR3 L1B Brightness Temperature
- DOI: 10.57746/EO.01hmsz76dxys1kvdw1vqjyr4x8
- Last Updated: 2026-06-30
Product Summary
GOSAT-GW/AMSR3 L1B 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 brightness tempearture. Level 1B product stores the brightness temperature converted from the Level 1A antenna temperature using the conversion coefficients. It is proportional to the power of observed electromagnetic wave. They are expressed by the physical temperature of blackbody, which can emit the electromagnetic wave with the same power.
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_L1B_TB
- Platform / Sensor
- GOSAT-GW / AMSR3
- Coverage
-
- Spatial Coverage
-
Bounding Rectangle
- Temporal Coverage
- 2025-08-11 to Present
- Product Level ID
- L1B
- 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 L1B Brightness Temperature
- Distribution Format
- NetCDF4
- Fees
- Free
- Citation
- Japan Aerospace Exploration Agency. 2025. GOSAT-GW/AMSR3 L1B Brightness Temperature. https://doi.org/10.57746/EO.01hmsz76dxys1kvdw1vqjyr4x8
- 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. |