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 2.00: Released January 2015. Added UTH uncertainty. Minor format corrections.
File description: MT1_L2-UTH-SAPSL1A2-1.06_2015-01-01T13-52-31_V2-00.hdf
Data_Fields/UTH dataset attributes
| Dataset attribute | DataType | Dimensions | Value |
| units | string | 1 | % |
| long_name | string | 1 | UTH |
| HDF_Calibration_Equation | string | 1 | physical_value = scale_factor*(SDS_count - add_offset) |
| Missing_Output | float64 | 1 | 99999.0 |
| QA_SDS | string | 1 | QUALITY_FLAG |
| actual_range | float64 | 2 | [2.292210578918457, 99.99664306640625] |
| Num_Fill | int32 | 1 | 32697 |
| Num_Missing_Output | int32 | 1 | 0 |
| Num_Valid | int32 | 1 | 1597503 |
| Physical_Range | float64 | 2 | [0.0, 100.0] |
| Comments | string | 1 | Upper Tropospheric Humidity determined for nlayers, where each layer corresponds to one of the 3 following channels: nlayer = 0 (UTH from the 183.31 ± 0.2 GHz channel); nlayer = 1 (UTH from the 183.31 ± 1.1 GHz channel); nlayer = 2 (UTH from the 183.31 ± 2.7 GHz channel) |
| valid_range | float32 | 2 | [0.0, 100.0] |
| _FillValue | float32 | 1 | -99999.0 |
| 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 |
| calibrated_nt | int32 | 1 | 5 |
