GCOM-W/AMSR2 L2 Integrated Water Vapor

  • DOI: 10.57746/EO.01gs73b0sq5s2w86n3cxdjwrga
  • Last Updated: 2023-02-14
Data Progress: In Work
G-Portal

Product Summary

GCOM-W/AMSR2 L2 Integrated Water Vapor 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 2 products calculates various geophysical parameters related to water using the Level 1B or 1R products as inputs.
This dataset includes Integrated Water Vapor (WV), amount of vertically accumulated water vapor (H2O in gaseous state) in the atmosphere, and defined as amount of water per unit area. Coverage of the product is over the ocean only, and unit is [kg/m2]. Total precipitable water is one of essential hydrological parameters describing state of the atmosphere along with precipitation and cloud liquid water. The Pixel_Data_Quality is quality flag stored for each observation point.
The provided format is HDF5. The Sampling resolution is 15 km. 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

15 km

Location

  • GEOGRAPHIC REGION > MID-LATITUDE
Dataset Short Name
GCOM-W_AMSR2_L2_WV
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
L2
Version Description

Version 1, 2013-05-17, Available
Version 2, 2021-06-16, Available

File Format
HDF5
Dataset Type
None / Scene
Resolution
Spatial Resolution
15 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 L2 Integrated Water Vapor
Distribution Format
HDF5
Fees
Free
Sample
Citation
Japan Aerospace Exploration Agency. 2012. GCOM-W/AMSR2 L2 Integrated Water Vapor. https://doi.org/10.57746/EO.01gs73b0sq5s2w86n3cxdjwrga
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
  • CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Science Keywords
  • EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR
Location Keywords
  • GEOGRAPHIC REGION > MID-LATITUDE

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.