include file: C_G 138
C*L------------------COMDECK C_G----------------------------------------   C_G.2      
C G IS MEAN ACCEL DUE TO GRAVITY AT EARTH'S SURFACE                        C_G.3      
      REAL G                                                               C_G.4      
                                                                           C_G.5      
      PARAMETER(G=9.80665)                                                 C_G.6      
C*----------------------------------------------------------------------   C_G.7