ALOS Data Users Handbook

ALOS Data Users Handbookregion, D option becomes effective, however, DEM applied product is not generated. That is; theproduct, which is defined as altitude = 0m, will be generated.(2) Map projectionOperator chooses UTM (Universal Transcerse Mercator) or PS (Polar Stereographic). It is specified byproduct 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 zonenumber 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 theprojection 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 most accuratevalue from all available data.(8) Accuracy of the used orbit attitude dataIt is mandatory that operator choose the precision attitude determination value or the very accurate valuefrom all available data.(9) Reference ellipsoidThis is a reference ellipsoid for map projection. Geodetic coordinates system ITRF97, Ellipsoid modelGRS80. (fixed)(10) Scene shift (along track)This is a scene shift in the along-track direction, and it is specified by frame number. There are 10 stepsfrom –5 to +4.(11) Pixel spacingOperator chooses the pixel spacing from 10m, 12.5m, 15m, 20m.Default of the pixel spacing depends on the pointing angle.Pointing angle 0 to 31.6 degrees 31.6 to 40.3 degrees More than 40.3 degreesPixel spacing 10m 15m 20m6-9