Processing Level
| Processing Level*1 | Definition | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Level 1B (L1B) | A scene *3 data product that stores the brightness temperature converted from the Level 1A antenna temperature using the conversion coefficients. (Swath data *2) | ||||||||||||||||||||
| Level 1R (L1R) | A scene *3 data product that stores the brightness temperature that is spatially resampled from Level 1B to match the center position and size of the Field of View (FOV) of each frequency band at each pixel. (Swath data *2) | ||||||||||||||||||||
| Level 2 (L2) | A scene *3 data product that stores a physical data retrieved from the brightness temperature at each footprint. (Swath data *2) | ||||||||||||||||||||
| Level 3 (L3) | A grid data product *4 that stores the brightness temperature or physical data converted using grid processing and temporally statistical processing.
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- Other than L1B and L1R, there are the following two unpublished processing levels:
Level 0 (L0) : Data with quality check flags appended.
Level 1A (L1A) : A scene data product that stores the antenna temperature count value converted by the radiometric correction processing and geometric correction processing from Level 0 data, the antenna temperature conversion coefficient, etc. - Swath data is a format in which data for each footprint is stored in a two-dimensional array (observation points in scanning direction x number of scanning lines) in order of observation time. In addition to data such as brightness temperature and geophysical quantity, quality information, latitude, and longitude are stored in Swath format.
- The standard L1B, L1R, and L2 products are stored in a single file, with one scene covering half the circumference of the earth. There are two types of scenes: ascending orbit from south to north and descending orbit from north to south.
- The daily and monthly L3 products are available for ascending and descending orbits. The L3 brightness temperature product is a file for each frequency band, each containing vertical and horizontal polarization data. The L3 geophysical product is a file for each geophysical quantity and contains the relevant data.
- The temporal statistical method used to create daily L3 products varies depending on the geophysical data type: The averaging method or the overwriting method, which provides the latest values for each pixel, is applied.
