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[ Standard Product ]

Product Product
ID
Areas Grid
(km)
Accuracy*1 Range Remarks
Data release
threshold
Standard Goal
Brightness temperature
(6 bands, 2 polarization)
Depends on Level*2 Global 5 - 50 ±1.5K ±1.5K ±1.0K
±0.3K
2.7-340K System error as a max. amplitude at 150K
Variance error of 3σ at 150K
Geophysical Products Integrated
water vapor
TPW 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
CLW 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 PRC 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 SST 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
SSW 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 SIC Polar region,
over ocean
15 ±10 % ±10 % ±5 % 0-100 % Accuracy is expressed in absolute value of sea ice concentration (%).
Snow depth SND 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 SMC 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.

*2 Product IDs of brightness temperature are defined as "ADN" for Level-1A, "BTB" for Level-1B, "RTB" for Level-1R, and "T06/T07/T10/T18/T23/T36/T89" for each band of Level-3.


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