CALL SEQUENCE...
       zxdev  ZXIN ZXOUT OUTPUT
       ggdev  GGIN GGOUT OUTPUT
 
 
      DESCRIPTION...
       zxdev  - CROSS-SECTION DEVIATION FROM MERIDIONAL MEAN
       ggdev  - GRID SET DEVIATION FROM GLOBAL MEAN
 
 
      AUTHOR  - J.D.Henderson, NOV 05/80.
      LAST REVISION: $Header: /home/cvs/RMNLIB/utils/rdiag/lspgm/zxdev.ptn,v 4.10 2014/09/25 20:20:57 dugas Exp $
 
 
      PURPOSE - COMPUTES DEVIATIONS AT EACH LEVEL FROM THE
                MERIDIONAL OR GLOBAL MEANS AND SAVES THE RESULT
 
      NOTE    - MAX LATITUDES IS 1999, MAX LEVELS IS 999.
 
 
      INPUT FILES...
       ZXIN  = GLOBAL OR HEMISPHERIC CROSS-SECTIONS
       GGIN  = GLOBAL OR HEMISPHERIC GAUSSIAN GRIDS
 
      OUTPUT FILES...
       ZXOUT = DEVIATION CROSS-SECTIONS
       GGOUT = DEVIATIONS FROM THE GLOBAL MEANS
 
 
      EXIT CONDITIONS...
        0 NO PROBLEMS
        1 PROBLEMS READING INPUT FILE
        2 ZXDEV FOUND DATA TYPE OTHER THAN ZONAL OR
          GGDEV FOUND DATA TYPE OTHER THAN GRID 
        3 ABORT ERROR READING INPUT FILE
        4 TOO MANY LATITUDES