Global Change Observation Mission 1st - Water "SHIZUKU" (GCOM-W1)


GCMD Science Keywords
[Atmosphere ] [Atmospheric Water Vapor ] [Humidity ] [Water Vapor ] [Land Surface ] [Soils ] [Soil Moisture/Water Content ] [Precipitation ] [Precipitation Amount ] [Oceans ] [Ocean Temperature ] [Sea Surface Temperature ] [Cryosphere ] [Snow/Ice ] [Snow Water Equivalent ]

IDENTIFICATION INFORMATION

Name Global Change Observation Mission 1st - Water "SHIZUKU" (GCOM-W1)
Metadata Identifier GCOM_W120181214174952-en

CONTACT

CONTACT on DATASET

Name Japan Aerospace Exploration Agency GCOM-W1 Data Providing Service Help Desk
E-mail z-gw1help@jaxa.jp

DOCUMENT AUTHOR

Name Satoko Miura
Organization JAXA/Mission Operations System Office (MOSS)

DATASET CREATOR

Name JAXA

DATE OF THIS DOCUMENT

2018-12-14

DATE OF DATASET

  • creation : 2013-05-30

DATASET OVERVIEW

Abstract

The Advanced Microwave Scanning Radiometer 2 (AMSR2,) which will be loaded onto the GCOM-W1, is a sensor to observe radiometers, or microwaves emitted naturally from the ground, sea surface and atmosphere, using six different frequency bands ranging from 7 GHz to 89 GHz. The strength of a natural microwave is determined by its characteristics and moisture, including the surface condition and temperature of the material. Although it depends on the frequency, the microwave is very weak. AMSR2 will detect such weak microwaves at an altitude of 700 kilometers and measure the strength of them with a very high accuracy. For example, by measuring the strength of a microwave emitted from the sea surface with the AMSR2, we can understand the water temperature of the sea surface to an accuracy of 0.5 degrees Celsius.

The antenna of the AMSR2, which receives microwaves from the ground, arc scans the ground surface at a ratio of one turn every 1.5 seconds and observes an area approximately 1,450 kilometers wide in one scan. Using this scanning method, the AMSR2 can observe over 99 percent of the Earth's area in just 2 days. The diameter of the antenna is about 2 meters, making it the world's largest observation sensor aboard a satellite. The height of the rotating part is about 2.7 meters and the weight is about 250 kilograms. The AMSR2 can keep rotating such a large and heavy antenna at a speed of one turn per 1.5 seconds for 24 hours a day and more than five years without a minute of rest.

Topic Category(ISO19139)

  • climatologyMeteorologyAtmosphere

  • oceans

Temporal Extent

Begin Date 2012-05-18
End Date Under Continuation

Geographic Bounding Box

North bound latitude 90
West bound longitude -180
Eastbound longitude 180
South bound latitude -90

Grid

Dimension Name Dimension Size (slice number of the dimension) Resolution Unit
()
()

Keywords

Keywords on Dataset

Keyword Type Keyword Keyword thesaurus Name
theme [Atmosphere ] > [Atmospheric Water Vapor ] > [Humidity ], [Atmosphere ] > [Atmospheric Water Vapor ] > [Water Vapor ], [Land Surface ] > [Soils ] > [Soil Moisture/Water Content ], [Atmosphere ] > [Precipitation ] > [Precipitation Amount ], [Oceans ] > [Ocean Temperature ] > [Sea Surface Temperature ], [Cryosphere ] > [Snow/Ice ] > [Snow Water Equivalent ] GCMD_science

Online Resource

Distribution Information

name version specification
HDF5, NetDF(after format conversion), GeoTIFF(Level3 only, after format conversion), TIFF(Level1m Level2, after format conversion)

DATA PROCESSING

Data Processing (1)

General Explanation of the data producer's knowledge about the lineage of a dataset

The followings products are available;

[Level1 ]

Brightness Temperature(L1B, L1R)

[Level2]

Total Precipitable Water

Cloud Liquid Water

Precipitation

Sea Surface Temperature

Sea Surface Wind speed

Sea Ice Concentration

Snow Depth

Soil Moisture Content

[Level3]

Total Precipitable Water

Cloud Liquid Water

Precipitation

Sea Surface Temperature

Sea Surface Wind speed

Sea Ice Concentration

Snow Depth

Soil Moisture Content

Brightness Temperature

USE CONSTRAINTS

Data Policy by Data Provider

http://gcom-w1.jaxa.jp/useagreement.html@


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