Calibration Mode
The calibration mode outputs only the VISCAL ADF, used to calibrate the next orbit for the SWIR, NIR and visible channels. The product is composed of one file and associated metadata.
The SLSTR Level-1 VISCAL data file contains summary visible and shortwave infrared calibration information derived from the VISCAL solar illumination period located within a previous product, typically for the orbit immediately preceding the current product. This file, named SL_1_VCS_AX, is produced in netCDF format for each orbit. The following table presents the detailed content of this file.
Element name | Description | Dimensions |
---|---|---|
Specific Dimensions | ||
visible_detectors | Number of visible detector elements | |
swir_detectors | Number of SWIR detector elements | |
views | Number of views (nadir and oblique) | |
integrators | Number of integrators | |
Included Variables | ||
ANX_time | Time of ascending node crossing in the UTC YYYY-MM-DDThh:mm:ss.ddddddz CCSDS format | 1 |
calibration_time | Time of calibration in the UTC YYYY-MM-DDThh:mm:ss.ddddddZ CCSDS format | 1 |
monitor_mean | Monitor diode average counts | 1 |
monitor_SD | Monitor diode noise counts | 1 |
For each Visible / NIR/ SWIR channel (S1 to S6) | ||
S(1:6)_solar_irradiances | associated solar irradiances | visible_detectors, views |
S(1:6)_slopes | associated slopes | visible_detectors, views, int |
S(1:6)_VISCAL_means | associated VISCAL average counts | visible_detectors, views, int |
S(1:6)_VISCAL_SD | associated VISCAL noise counts | visible_detectors, views, int |
S(1:6)_BB1_means | associated BB1 average counts | visible_detectors, views, int |
S(1:6)_BB1_SD | associated BB1 noise counts | visible_detectors, views, int |