SUMZE, SUMWT:

The aips routines, SUMZE.FOR and SUMWT.FOR do almost the
same thing as SUMIM.FOR except that if the input is blank
it is read in as a zero.  When running SUMZE, put FACTOR=1
and the output will be the sum of all input points.  If the
input is a blank it is just read as a blank and the output
is *NOT* blank.  Then run SUMWT with FACTOR=1.  This will
add up how many non-zero non-blank input points there were
and put this into an output map.  Finally run COMB to take
the result of SUMZE divided by the result of SUMWT to get the
average.  Basically it does what SUMIM does but won't put
blanks in the output.  Note that, as with SUMIM, all 
input maps must be interpolated onto the same grid.

To install and compile the program do the following:

1.  Put SUMZE.FOR and SUMWT.FOR	 into the area:

YOURCURRENTAIPS/APL/PGM

e.g. 31DEC05/APL/PGM

2.  Put SUMZE.HLP and SUMWT.HLP into the area:

YOURCURRENTAIPS/HELP

3.  Go to directory

$SYSUNIX  or wherever you find the COMLNK routine for your
version of aips, e.g.

cd /31DEC05/SYSTEM/UNIX

4.  To compile the routines:

COMLNK YOURCURRENTAIPS/APL/PGM/SUMZE.FOR

COMLNK YOURCURRENTAIPS/APL/PGM/SUMWT.FOR


The result should be put into the $LOAD area automatically

The program should then run.


XSMC:

Do the same thing as for SUMZE etc.  It goes in the same
aips area, i.e. $APLPGM