AMSR Series | Advanced Microwave scanning Radiometer

AMSR Data Product Catalog

AMSR data includes observed brightness temperature and geophysical quantities estimated from brightness temperature.

JAXA calls the data that are provided to the public as products. There are three types of products (Level-1, Level-2, and Level-3) according to the processing level, and there are standard products and research products respectively.

AMSR Data Product Catalog

Definition of Processing Levels

Level	Contents
Level 0	A data with quality check flags appended.
Level 1A	A scene data product that stores the antenna temperature count value converted by the radiometric and geometric correction processing from Level 0 data, the antenna temperature conversion coefficients, etc.
Level 1B	A scene data product that stores the brightness temperature converted from the Level 1A antenna temperature using the conversion coefficients.
Level 1R	A scene data product that stores the brightness temperature that is spatially resampled from Level 1B to match the center position and size of the Field of View (FOV) of each frequency band at each pixel.
Level 2	A scene data product that stores a physical data retrieved from the brightness temperature at each pixel.
Level 3	A grid data product that stores the brightness temperature or physical data converted using grid processing and temporally statistical processing.

Standard Product

Product		Product ID	Areas	Grid (km)	Accuracy^*1			Range	Remarks
Product		Product ID	Areas	Grid (km)	Data release threshold	Standard	Goal	Range	Remarks
Brightness temperature (7 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.

Research Product

Product	Product ID	Areas	Grid (km)	Goal Accuracy	Range	Status	Remarks
All-weather sea surface wind speed	ASW	Ocean	60	±7m/s	0 - 70m/s	available (Ver.301)	Except sea ice areas. The goal accuracy is defined for the wind speed more than 17 m/s. It was released to the public on Oct. 6, 2015.
10-GHz (high-resolution) SST	SST	Ocean	30	±0.8℃	-2 - 35℃	available (included in standard product Ver. 2.1 or later)	Except sea ice and precipitating areas. It is already contained in the standard SST product (Ver. 2.1 or later)
Multi-band SST	SST	Ocean	30-50	±0.8℃	-2 - 35℃	available (included in standard product Ver. 4)	Except sea ice and precipitating areas. It is already contained in the standard SST product (Ver. 4)
Multi-band SST	SST	Ocean	30-50	±0.8℃	-2 - 35℃	available (included in standard product Ver. 4)	Except sea ice and precipitating areas. It is already contained in the standard SST product (Ver. 4)
Soil moisture (SMC) and vegetation water content (VWC) based on the land data assimilation methodology	LDA	land over the continents of Africa and Australia	25	SMC: ±8% VWC: ±1kg/m²	SMC: 0 - 100% VWC: 0 - 2kg/m²	under development	Profiles are retrieved for SMC.
Land surface temperature	LST	Land	15	Forest: ±3K Low vegetation: ±4K	0 - 50℃	available (Ver. 100)	Temperature at a canopy top is defined as land surface temperature.
Vegetation water content	VWC	Land	10	±1kg/m²	0 - 4kg/m²	under development	-
High Resolution Sea Ice Concentration	HSI	Ocean at high latitudes	5	±15%	0 - 100%	available (Ver. 100)	Accuracy is expressed in absolute value of sea ice concentration (%).
Detection of thin sea ice	TSI	Okhotsk Sea Bering Sea Hudson Bay	15	80%	N/A	available (Ver. 100)	Sea ice area (≦ 30 cm) is defined as thin ice area. A flag representing whether thin ice area is dominant in a pixel is stored in a product. Accuracy is expressed in right answer rate (%).
Sea ice motion vector	SIM	Ocean at high latitudes	50	±3cm/s in latitude and longitude	0 - 40cm/s	under development	-
Total Precipitable Water over Land	PWL	Land	15	±6.5kg/m²	0 - 70kg/m²	available (Ver. 100)	Vertically integrated (columnar)
Sea Ice Thickness (< 20cm)	SIT	Polar region,over ocean	15	Thin solid ice:±10cm Active frazil:±3cm	0 - 20cm	under development
Sea Ice Thickness (>= 20cm)	SIT	Polar region,over ocean	15	±20cm	0.2 - 1.2m	under development