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[ Standard Product ]
| Product | Areas | Grid (km) |
Accuracy*1 | Range | |||
|---|---|---|---|---|---|---|---|
| Data release threshold |
Standard | Goal | |||||
| Integrated water vapor | Global, over ocean |
15 | ±3.5 kg/m2 | ±3.5 kg/m2 | ±2.0 kg/m2 | 0-70 kg/m2 | Vertically integrated (columnar) water vapor amount. Except sea ice and precipitating areas. |
| Integrated cloud liquid water | Global, over ocean |
15 | ±0.10 kg/m2 | ±0.05 kg/m2 | ±0.02 kg/m2 | 0-1.0 kg/m2 | Vertically integrated (columnar) cloud liquid water. Except sea ice and precipitating areas. |
| Precipitation | Global, except cold latitudes |
15 | Ocean ±50 % Land ±120 % |
Ocean ±50 % Land ±120 % |
Ocean ±20 % Land ±80 % |
0-20 mm/h | Surface precipitation rate. Accuracy is defined as relative error (ratio of root-mean-square error to average precipitation rate) in 50km grid average. |
| Sea surface temperature | Global, over ocean |
50 | ±0.8 deg.C | ±0.5 deg.C | ±0.2 deg.C | -2-35 deg.C | Except sea ice and precipitating areas. Goal accuracy is defined as monthly mean bias error in 10 degrees latitudes. |
| Sea surface wind speed | Global, over ocean |
15 | ±1.5 m/s | ±1.0 m/s | ±1.0 m/s | 0-30 m/s | Except sea ice and precipitating areas. |
| Sea ice concentration | Polar region, over ocean |
15 | ±10 % | ±10 % | ±5 % | 0-100 % | Accuracy is expressed in absolute value of sea ice concentration (%). |
| Snow depth | Land | 30 | ±20 cm | ±20 cm | ±10 cm | 0-100 cm | Except ice sheets and dense forest areas. Accuracy is expressed in snow depth and defined as mean absolute error of instantaneous observations. |
| Soil moisture | Land | 50 | ±10 % | ±10 % | ±5 % | 0-40 % | Volumetric water content over global land areas including arid and cold regions, except areas covered by vegetation with 2kg/m2 water equivalent. Accuracy is defined as mean absolute error of instantaneous observations. |
*1 Accuracy is defined as root-mean-square error of instantaneous values unless otherwise stated. Assumed validation methodologies are not explained here.
Earth Observation Research Center,Japan Aerospace Exploration Agency
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