ALOS-3
Definition of standard products
| Process | Details of process |
|---|---|
| Level 1A | Raw data that has been extracted from the observation data, stretched/formed lines, and decompressed. Accompanying the radiometric and geometric information needed for Level 1B1 and later processes. |
| Level 1B1 | Performing radiometric correction to L1A data and the absolute calibration factors are added. Accompanying geometric information needed for Level 1B2 and later processes. |
| Level 1B2 | Performing geometric correction to L1B1 data and forming the Rational Polynomial Coefficients (RPC) based on the system correction. The options are:
R: Geo-reference product
G: Geo-coded product
|
| Level 1C | Orthorectification process using the digital elevation data (i.e., AW3D PRISM Digital Surface Model (DSM), Digital Elevation Model (DEM) by the Geospatial Information Authority of Japan (GSI), SRTM), including the function for registration with Digital Elevation Data. The options are:
R: Geo-reference product
G: Geo-coded product
|
Geo-reference product (map-projected based on the flight direction) is defined by determining image position.
Geo-coded product (projected based on the direction on the map) is defined by rotating the same range of the Geo-reference image to map-north.