Aqua/AMSR-E L3 Water Vapor (1-Day, 0.25 deg)

  • DOI: 10.57746/EO.01gs73b029v8xg21yba17tavjz
  • Last Updated: 2023-02-14
Data Progress: Complete
G-Portal

Product Summary

Aqua/AMSR-E L3 Water Vapor (1-Day, 0.25 deg) dataset is obtained from the AMSR-E sensor onboard Aqua and produced by the Japan Aerospace Exploration Agency (JAXA).
Aqua of NASA was launched on May 4th, 2002 in Sun-synchronous sub-recurrent Orbit. Aqua observes various kinds of physical phenomena related to water and energy circulation from space. Aqua data promoted the research activities for interactions between the atmosphere, oceans and lands, and their effects on climate changes.
AMSR-E scans the Earth's surface by mechanically rotating the antenna and acquires radiance data of the Earth's surface. Each frequency band is monitored by vertical and horizontal polarized wave. It conically scans and keeps an angle of incidence on the earth surface (a nominal of 55 degrees) and accomplishes a swath width of about 1450 km. The AMSR-E reached its limit to maintain the antenna rotation speed necessary for regular observations, and the AMSR-E restarted its observation in slow rotation mode (2 rotations per minute) on December 4, 2012. However, the AMSR-E reached its limit to maintain the antenna rotation speed necessary for slow rotation mode and it automatically halted its observation and rotation on December 4, 2015.
Level 3 data inputs level 1B and level 2 data and projected to the map in accordance with the specified projection technique (Equi-Rectangular (EQR) or Polar Stereographic (PS)), and then the arithmetic average of 1 day is computed on each grid. Moreover, level 3 data for 1 day of each geophysical parameter is inputted for 1 month, arithmetic average of 1 month is computed on each grid, as the same way as 1 day average calculation.
This product includes daily mean Water Vapor (WV). PWI (water vapor index) is converted to total water vapor content (PWA, kg/m^2) using a look-up table, which is designed as the provability of PWA with AMSR retrievals is equivalent to that of PWA with radio sonde. The physical quantity unit is kg/m^2.
The provided format is HDF4. The statistical period is 1 day. The spatial resolution is 0.25 deg. The current version of the product is "Version 7". The projection method is EQR. The generation unit is global.

Platform
Aqua
Sensor
AMSR-E

Coverage

Temporal Coverage

2002-06-01 to 2011-10-05

Spatial Coverage

Bounding Rectangle
(90.0°, -180.0°, -90.0°, 180.0°)

Resolution

0.25 deg

Location

  • GLOBAL > GLOBAL OCEAN
Dataset Short Name
Aqua_AMSR-E_L3_WV_1day_0.25deg
Platform / Sensor
Aqua / AMSR-E
Coverage
Spatial Coverage
Bounding Rectangle
(90.0°, -180.0°, -90.0°, 180.0°)
Temporal Coverage
2002-06-01 to 2011-10-05
Product Level ID
L3
Version Description

Version 1, 2003-09-19, Notavailable
Version 3, 2005-03-03, Notavailable
Version 4, 2006-03-15, Notavailable
Version 7, 2011-09-29, Available

File Format
HDF4
Dataset Type
1day / Global
Resolution
Spatial Resolution
0.25 deg
Temporal Resolution
1day
Dataset Progress
Complete
Projection
EQR
Collection Data Type
SCIENCE_QUALITY
Get Data
https://gportal.jaxa.jp/gpr/?lang=en
Dataset Title
Aqua/AMSR-E L3 Water Vapor (1-Day, 0.25 deg)
Distribution Format
HDF4
Fees
Free
Citation
Japan Aerospace Exploration Agency. 2002. Aqua/AMSR-E L3 Water Vapor (1-Day, 0.25 deg). https://doi.org/10.57746/EO.01gs73b029v8xg21yba17tavjz
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
  • GLOBAL > GLOBAL OCEAN

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.