ALOS Data Users Handbook

ALOS Data Users Handbook6.2 AVNIR-2 Data Products 36.2.1 Definition of Processing LevelsStandard processing levels of AVNIR-2 are shown in Table 6.2-1.Table 6.2-1 Level Definition of AVNIR-2 Standard Data ProductsLevel Definition Option Note1A Uncompressed, reconstructed digital counts appendedwith radiometric calibration coefficients and geometricSeparate image filesfor each bandcorrection coefficients (appended but not applied)1B1 Radiometrically calibrated data at sensor input Separate image files1B2Geometrically corrected dataOptionG: Systematically Geo-codedR: Systematically Geo-referencedD: Correction with coarse DEM (Japan area only)Option G or R is alternativeMap projectionResamplingPixel spacingfor each bandSeparate image filesfor each band6.2.2 Scene DefinitionsAVNIR-2 scene is defined by RSP (Reference System for Planning) number (Path, Frame) and scene shiftdistance. Each path is separated into 7200 frames on the basis of the argument of latitude of satellite. Framenumber is allocated every 10 frame (approximately 56 km) in AVNIR-2. Scene shift can be carried out in theprocessed data, and the distance of scene shift is specified by distance of the scene shift is specified by thenumber of frames.In the ALOS Data Processing Subsystem, the scene of a Raw product (geometrically uncorrected) and aGeo-reference product (map-projected based on the flight direction) are defined by determining imageposition and image range using input data according to the RSP.And the scene of a Geo-coded product (projected based on the direction on the map) is defined by rotatingthe same range of the Geo-reference image to map-north.Table 6.2-2 describes the scene definitions and scene size of AVNIR-2.3 Refer to “ALOS AVNIR-2 Level 1 Product Format Descriptions” (http://www.eorc.jaxa.jp/ALOS/doc/format.htm) fordetails.6-7