GOCART model horizontal resolution: 2.5 deg longitude by 2 deg latitude except 
the two polar gridboxes which are in 1 deg latitude.  There are total of 144 
longitudinal gridboxes and 91 latitudinal gridboxes.  The model output starts 
at -180 longitude (dateline) and -89.5 latitude (south pole).

Center of each longitudinal gridbox:
 -180.00 -177.50 -175.00 -172.50 -170.00 -167.50 -165.00 -162.50
 -160.00 -157.50 -155.00 -152.50 -150.00 -147.50 -145.00 -142.50
 -140.00 -137.50 -135.00 -132.50 -130.00 -127.50 -125.00 -122.50
 -120.00 -117.50 -115.00 -112.50 -110.00 -107.50 -105.00 -102.50
 -100.00  -97.50  -95.00  -92.50  -90.00  -87.50  -85.00  -82.50
  -80.00  -77.50  -75.00  -72.50  -70.00  -67.50  -65.00  -62.50
  -60.00  -57.50  -55.00  -52.50  -50.00  -47.50  -45.00  -42.50
  -40.00  -37.50  -35.00  -32.50  -30.00  -27.50  -25.00  -22.50
  -20.00  -17.50  -15.00  -12.50  -10.00   -7.50   -5.00   -2.50
    0.00    2.50    5.00    7.50   10.00   12.50   15.00   17.50
   20.00   22.50   25.00   27.50   30.00   32.50   35.00   37.50
   40.00   42.50   45.00   47.50   50.00   52.50   55.00   57.50
   60.00   62.50   65.00   67.50   70.00   72.50   75.00   77.50
   80.00   82.50   85.00   87.50   90.00   92.50   95.00   97.50
  100.00  102.50  105.00  107.50  110.00  112.50  115.00  117.50
  120.00  122.50  125.00  127.50  130.00  132.50  135.00  137.50
  140.00  142.50  145.00  147.50  150.00  152.50  155.00  157.50
  160.00  162.50  165.00  167.50  170.00  172.50  175.00  177.50

Center of each latitudinal gridbox:
  -89.50  -88.00  -86.00  -84.00  -82.00  -80.00  -78.00  -76.00
  -74.00  -72.00  -70.00  -68.00  -66.00  -64.00  -62.00  -60.00
  -58.00  -56.00  -54.00  -52.00  -50.00  -48.00  -46.00  -44.00
  -42.00  -40.00  -38.00  -36.00  -34.00  -32.00  -30.00  -28.00
  -26.00  -24.00  -22.00  -20.00  -18.00  -16.00  -14.00  -12.00
  -10.00   -8.00   -6.00   -4.00   -2.00    0.00    2.00    4.00
    6.00    8.00   10.00   12.00   14.00   16.00   18.00   20.00
   22.00   24.00   26.00   28.00   30.00   32.00   34.00   36.00
   38.00   40.00   42.00   44.00   46.00   48.00   50.00   52.00
   54.00   56.00   58.00   60.00   62.00   64.00   66.00   68.00
   70.00   72.00   74.00   76.00   78.00   80.00   82.00   84.00
   86.00   88.00   89.50