GCOM-W/AMSR2 L1B Brightness Temperature
- DOI: 10.57746/EO.01gs73ans548qghaknzdjyxd2h
- Last Updated: 2023-02-14
Product Summary
GCOM-W/AMSR2 L1B Brightness Temperature dataset is obtained from the AMSR2 sensor onboard GCOM-W and produced by the Japan Aerospace Exploration Agency (JAXA).
GCOM-W was launched by the H-IIA Launch Vehicle No. 21 (H-IIA F21) at 1:39 a.m. on May 18th, 2012 (Japan Standard Time, JST) and inserted into a planned position on the "A-Train" orbit. GCOM-W equipped with AMSR2 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. AMSR2 has swath of 1450 km and 7 microwave bands. The observation data will enable the creation of long-term trustworthy data sets of global physical amount.
Level 1B product uses Level 1A product as the input and converting digital output values from the sensor to brightness temperatures. Values that are calculated from sensor counts and are 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.
This product is the Level 1B brightness temperatures which converted from digital output values from the sensor. The physical quantity unit is Kelvin.
The provided format is HDF5. The physical quantity unit is Kelvin. The sampling resolution is 5-50km. The current version of the product is Version 2. The Version 1 is also available. The generation unit is Scene (defined as a half orbit).
- Platform
- GCOM-W
- Sensor
- AMSR2
Coverage
Temporal Coverage
2012-07-02 to Present
Spatial Coverage
Bounding Rectangle
(90.0°,
-180.0°,
-90.0°,
180.0°)
Resolution
5-50 km
Location
- GEOGRAPHIC REGION > GLOBAL
- Dataset Short Name
- GCOM-W_AMSR2_L1B_TB
- Platform / Sensor
- GCOM-W / AMSR2
- Coverage
-
- Spatial Coverage
-
Bounding Rectangle
(90.0°, -180.0°, -90.0°, 180.0°) - Temporal Coverage
- 2012-07-02 to Present
- Product Level ID
- L1B
- Version Description
Version 1, 2013-03-01, Available
Version 2, 2016-08-23, Available- File Format
- HDF5
- 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
- GCOM-W/AMSR2 L1B Brightness Temperature
- Distribution Format
- HDF5
- Fees
- Free
- Sample
- Citation
- Japan Aerospace Exploration Agency. 2012. GCOM-W/AMSR2 L1B Brightness Temperature. https://doi.org/10.57746/EO.01gs73ans548qghaknzdjyxd2h
- Access Constraints
No constraints but users need to be registered with the G-portal User Registration system to download files.
- Use Constraints
The user is entitled to use G-Portal data free of charge without any restrictions (including commercial use) 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
- Science Keywords
-
- EARTH SCIENCE > SPECTRAL/ENGINEERING > MICROWAVE > BRIGHTNESS TEMPERATURE
- Location Keywords
-
- GEOGRAPHIC REGION > GLOBAL
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.