Product definition document:
PDD_SAP_L2-UTH_V1_R4.pdf (updated in November 2015)Version history:
Version 1.00: Released October 2013. Original versionVersion 1.01: Released May 2014. The BT-to-UTH retrieval is performed after correction of the limb effect on the BTs. For this correction, the measured BTs at a given incident angle are redefined at an equivalent nadir viewing geometry, from a look-up-table. In V1.00 a step of 5° in incidence angle was used, whereas in the current V1.01 a step of 2° has been preferred.
Version 2.01: Released January 2015. Added an extra time dimension in the netcdf file. Minor format corrections.
Version 2.02: Released November 2015. The error standard deviation of UTH values is now included in each gridpoint weighted by their uncertainty; minor modification of format .
File description: MT1_L2B-UTH-SAPSL1A2-1.07_2015-11-01T14-15-58_V2-02.nc
layer dataset attributes
| Dataset attribute | DataType | Dimensions | Value |
| _FillValue | int32 | 1 | 2147483647 |
| long_name | string | 1 | layer |
| Calibration_Equation | string | 1 | SDS_count = scale_factor*(physical_value - add_offset) |
| Total_Values | int32 | 1 | 3 |
| Comments | string | 1 | UTH is determined for nlayers, where each layer corresponds to one of the 3 following channels: layer = 1: UTH from the 183.31 ± 0.2 GHz channel; layer = 2: UTH from the 183.31 ± 1.1 GHz channel; layer = 3: UTH from the 183.31 ± 2.7 GHz channel |
| scale_factor | float64 | 1 | 1.0 |
| scale_factor_err | float64 | 1 | 0.0 |
| add_offset | float64 | 1 | 0.0 |
| add_offset_err | float64 | 1 | 0.0 |
| Missing_Value | int32 | 1 | -2147483648 |
| axis | string | 1 | Z |
