Name | Global Change Observation Mission 1st - Water "SHIZUKU" (GCOM-W1) |
Metadata Identifier | GCOM_W120230727082527-en |
Name | Japan Aerospace Exploration Agency GCOM-W1 Data Providing Service Help Desk |
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z-gw1help@jaxa.jp |
Name | Satoko Miura |
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Organization | JAXA/Mission Operations System Office (MOSS) |
Name | JAXA |
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creation : 2013-05-30
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.
climatologyMeteorologyAtmosphere
oceans
Begin Date | 2012-05-18 |
End Date | Under Continuation |
North bound latitude | 90 |
West bound longitude | -180 |
Eastbound longitude | 180 |
South bound latitude | -90 |
Dimension Name | Dimension Size (slice number of the dimension) | Resolution Unit |
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Keyword Type | Keyword | Keyword thesaurus Name |
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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 |
JAXA GCOM-W1 Data Providing Service : https://gcom-w1.jaxa.jp/auth.html
name | version | specification |
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HDF5, NetDF(after format conversion), GeoTIFF(Level3 only, after format conversion), TIFF(Level1m Level2, after format conversion) |
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
http://gcom-w1.jaxa.jp/useagreement.html