| Description |
Top of atmosphere earth radiance
Documentation available at:
https://sentinel.esa.int/documents/247904/3119978/Sentinel-5P-L01B-metadata-specifications
https://sentinel.esa.int/documents/247904/3119978/Sentinel-5P-Level-01B-input-output-data-specification
https://sentinel.esa.int/documents/247904/2476257/Sentinel-5P-TROPOMI-Level-1B-ATBD
Contains
Level-1b radiance
The Level-1b radiance products contain the Earth radiance measurements, including
annotation data such as geolocation. For each data granule, typically of the size of one orbit, there is
a data product for each of the eight bands. The radiance products are the main input for the Level-2
processors.
Level-1b irradiance
The Level-1b irradiance products contain the averaged solar irradiance measurements,
including annotation data. For each data granule, there is a data product for each of the two modules,
UVN and SWIR. The Level-2 processors will use the irradiance products to calculate reflectance from
the Earth radiance data. The irradiance data is used for calibration processing as well. Every 15 orbits -
approximately once every calendar day - TROPOMI will be commanded to perform a solar irradiance
measurement. If no solar measurements are available in the data granule being processed, no irradiance
product will be generated.
Level-1b calibration
The Level-1b calibration products contain the calibration and background measurements,
including annotation data, as well as any calibration data that are derived from radiance and irradiance
measurements. For each data granule, there is a data product for each of the two modules, UVN and
SWIR. The calibration products are the main input for the calibration processors that will use these
products for generating updates to the calibration key data and for generating trending and monitoring
products.
Level-1b engineering
The Level-1b engineering products contain the instrument’s engineering data converted
to physical units. For each data granule, there is a single data product. The engineering products are
input for the calibration processors who will use these products for generating updates to the calibration
key data and for generating trending and monitoring products. The L1b engineering product is only
intended for calibration and monitoring purposes. All instrument information needed or relevant for L2
processing will be contained within the radiance and irradiance products. |