ALOS Data Users Handbook

Section 6 ALOS Data Products6.1.3 Processing ParameterThis section describes the processing parameters that can specify to PRISM products.(1) 1B2 optionThis option can apply to the geometric correction for Level 1B2.It is specified by product ID.It is mandatory that operator choose G or R.R: Geo-referenceG: Geo-cordedThere is a possibility that DEM correction error will occur in the place of rough terrain. In this case,processing which does not select option D is carried out.(2) Map projectionOperator chooses UTM (Universal Transcerse Mercator) or PS (Polar Stereographic).It is specified by product ID.(3) ResamplingOperator chooses NN (Nearest Neighbor), CC (Cubic Convolution) or BL (Bi-Linear).(4) UTM zone numberThis is a zone number where UTM was chosen in the map projection method.The default is the zone number corresponding to the latitude and longitude of the scene center.(5) PS projection parameterThis is a projection parameter where PS was chosen in the map projection method.The default is the projection parameter corresponding to the latitude and longitude of the scene center.(6) Map directionThis is an imagery direction on map projection.True north or Map north. (It is valid for Geo-coded only)(7) Accuracy of the used orbit dataIt is mandatory that operator choose the precision orbit determination value only or the very accurate valuefrom all available data.(8) Accuracy of used orbit attitude dataIt is mandatory that operator choose the precision attitude determination value, the high-frequency attitudedetermination value or the very accurate value from all available data.(9) Reference ellipsoidThis is a reference ellipsoid for map projection.6-4