Keyword Posn Type Description ------- ---- ---- ----------- NUMBER 1 INTEGER Number of input datafiles (1 to 20). INP1 2 UNIV Name of 1st input datafile INP2 3 UNIV Name of 2nd input datafile INP3 - UNIV Name of 3rd input datafile INP4 - UNIV Name of 4th input datafile . . . INP20 - UNIV Name of 20th input datafile XOFFSET - INTEGER The number of pixels between the left hand edge of the current datafile and that of the first file input. YOFFSET - INTEGER The number of pixels between the bottom edge of the current datafile and that of the first file input. OUT - UNIV Name of the output file. AVERAGE - LOGICAL Average the pixels where two or more pixels from the input data combine to Hidden default = YES make one output pixel ? If NO then the input pixels are just added. By default averaging takes place. OTITLE - CHAR Title of output image structure. Hidden default = Mosaic