Program: EXTEND Purpose: Copy set and extend new set with one or more axes. Change size of set. Category: MANIPULATION, UTILITY, HEADER File: extend.c Author: M.G.R. Vogelaar Keywords: INSET= Give set, subsets: Maximum number of subsets is 8192. BOX= Give box in ...., ..., [entire subset] This box that is given here will be the size of the output set. OUTSET= Give output set (, subsets): Output set and subset(s) for the result. The number of output subsets is the same as the number of input sub- sets. CTYPE1= Enter axis name of first axis [stop axis input] For the n_th axis the keyword will be CTYPEn=, like all the following keywords NAXIS1= Size of axis in grids. CRPIX1= Reference pixel of the axis. CUNIT1= Physical units of axis [depends on CTYPE] CRVAL1= Value at reference pixel in CUNITs. CDELT1= Grid separation in CUNITs. CROTA1= Rotation angle of axis in degrees [0.0] This keyword is only asked in case of a DEC axis. DUNIT1= Secondary units of axis [depends on CTYPE] This keyword is only asked in case of a FREQ axis. DRVAL1= Secondary reference value in DUNITs. This keyword is only asked in case of a FREQ axis. FREQ0= Give rest frequency in Hz. This keyword is only asked in case of a FREQ axis. Description: Sometimes it is convenient to extend a set with an extra axis. For instance, a couple of 2-dim. IRAS maps could be bundled into one set. With this program you can copy the first set to a new set and extend this set with an extra axis (e.g. a PARAM axis). With the program COPY, you can copy the other sets into your created new set. The size of the box is important for the size of the output set. If the box size is smaller than the frame of the original set, a smaller output set will be made. Also a bigger output set can be made, but then, only data within the frame of the input will be copied. Notes: Example: Updates: Jun 4, 1993: VOG, Document created.