Level-3 Soil Moisture Data Fields

The following Notations are used in this document:

Type
Description
Float64 64-bit or 8-byte floating point
Int16 16-bit or 2-byte signed integer

There are two Fill Values:

Fill Values
Description
9999 Indicates pixels that are void of any retrieval due to inherent gaps between available L2A swaths.
-9999 Indicates no retrieval due to bad brightness temperature data or screening by land surface classification, or unsuccessful retrieval due to retrieval values outside the physical range.


Note: The dimension of each field is 586 rows x 1383 columns.

Ascending Land Grid
Field Name
Data Type
Description
Scale Factor
A_Time
Float64
Scan start time. International Atomic Time in seconds with 01 January 1993 as the zero base (TAI93)
n/a
A_TB06.9V (Res 1)
Int16
6.9V GHz Tb (K)

Level-2A 6.9 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB06.9H (Res 1)
Int16
6.9H GHz Tb (K)

Level-2A 6.9 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB10.7V (Res 1)
Int16
10.7V GHz Tb (K)

Level-2A 10.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB10.7H (Res 1)
Int16
10.7H GHz Tb (K)

Level-2A 10.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB18.7V (Res 1)
Int16
18.7V GHz Tb (K)

Level-2A 18.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB18.7H (Res 1)
Int16
18.7H GHz Tb (K)

Level-2A 18.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB36.5V (Res 1)
Int16
36.5V GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB36.5H (Res 1)
Int16
36.5H GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB36.5V (Res 4)
Int16
36.5V GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB36.5H (Res 4)
Int16
36.5H GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB89.0V (Res 4)
Int16
89.0V GHz Tb (K)

Level-2A 89.0 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_TB89.0H (Res 4)
Int16
89.0H GHz Tb (K)

Level-2A 89.0 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
A_Soil_Moisture
Int16
Soil moisture at 10.7 GHz resolution (g cm-3). Range: 0 to 500. Multiply data values by 0.001 to obtain soil moisture in g cm-3.
A_Veg_Water_Content
Int16
The Vegetation Water Content field (kg m-2) incorporates the effects of vegetation and roughness together. See the Derivation Techniques and Algorithms section in the AMSR-E/Aqua L2B Surface Soil Moisture, Ancillary Parameters, & QC EASE-Grids Guide Document. When interpreted as vegetation water content, it is the total water content in the vertical column of vegetation averaged over the retrieval footprint. Multiply data values by 0.01 to obtain vegetation water content in kg m-2.
A_Land_Surface_Temp
Int16
Land Surface Temperature (K) is not calculated because of Radio Frequency Interference (RFI) contamination in the 6.9 GHz channels . The field contains only fill values. Multiply data values by 0.1 to obtain units in K.
A_Inversion_QC_Flag
Int16
Inversion quality control flag. Also includes surface type flags encoded in individual bits of this integer. For a description of the contents, see the Processing Steps section of the AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parameters, & QC EASE-Grids Guide Document. For grid points such as open or inland water, a fill value of 9999 is assigned.
n/a


Descending Land Grid
Field Name
Data Type
Description
Scale Factor
D_Time Float64 Scan start time. International Atomic Time in seconds with 01 January 1993 as the zero base (TAI93).
n/a
D_TB06.9V (Res 1)
Int16
6.9V GHz Tb (K)

Level-2A 6.9 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB06.9H (Res 1)
Int16
6.9H GHz Tb (K)

Level-2A 6.9 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB10.7V (Res 1)
Int16
10.7V GHz Tb (K)

Level-2A 10.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB10.7H (Res 1)
Int16
10.7H GHz Tb (K)

Level-2A 10.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB18.7V (Res 1)
Int16
18.7V GHz Tb (K)

Level-2A 18.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB18.7H (Res 1)
Int16
18.7H GHz Tb (K)

Level-2A 18.7 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB36.5V (Res 1)
Int16
36.5V GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB36.5H (Res 1)
Int16
36.5H GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 56 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB36.5V (Res 4)
Int16
36.5V GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB36.5H (Res 4)
Int16
36.5H GHz Tb (K)

Level-2A 36.5 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB89.0V (Res 4)
Int16
89.0V GHz Tb (K)

Level-2A 89.0 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_TB89.0H (Res 4)
Int16
89.0H GHz Tb (K)

Level-2A 89.0 GHz data with a mean spatial resolution of 12 km were resampled to a 25 km EASE-Grid to create this data field.
Multiply data values by 0.1 to obtain units in K.
D_Soil_Moisture
Int16
Soil moisture at 10.7 GHz resolution (g cm-3). Range: 0 to 500. Multiply data values by 0.001 to obtain soil moisture in g cm-3.
D_Veg_Water_Content
Int16
The Vegetation Water Content field (kg m-2) incorporates the effects of vegetation and roughness together. See the Derivation Techniques and Algorithms section in the AMSR-E/Aqua L2B Surface Soil Moisture, Ancillary Parameters, & QC EASE-Grids Guide Document. When interpreted as vegetation water content, it is the total water content in the vertical column of vegetation averaged over the retrieval footprint. Multiply data values by 0.01 to obtain vegetation water content in kg m-2.
D_Land_Surface_Temp
Int16
Land Surface Temperature (K) is not calculated because of Radio Frequency Interference (RFI) contamination in the 6.9 GHz channels. The field contains only fill values. Multiply data values by 0.1 to obtain units in K.
D_Inversion_QC_Flag
Int16
Inversion quality control flag. Also includes surface type flags encoded in individual bits of this integer. For a description of the contents, see the Processing Steps section of the AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parameters, & QC EASE-Grids Guide Document. For grid points such as open or inland water, a fill value of 9999 is assigned.
n/a