Girdpoint location 
The grid orientation is west to east, south to north.


Upper left corner               Upper right corner
I=1, J=1  (0.00 E, 87.8638 S)   I=128, J=1  (357.1875 E, 87.8638 S)
 
Lower left corner               Lower right corner
I=1, J=64 (0.00 E, 87.8630 N)   I=128, J=64 (357.1875 E, 87.8630 N)



 lon = 0, 2.8125, 5.625, 8.4375, 11.25, 14.0625, 16.875, 19.6875, 22.5, 
    25.3125, 28.125, 30.9375, 33.75, 36.5625, 39.375, 42.1875, 45, 47.8125, 
    50.625, 53.4375, 56.25, 59.0625, 61.875, 64.6875, 67.5, 70.3125, 73.125, 
    75.9375, 78.75, 81.5625, 84.375, 87.1875, 90, 92.8125, 95.625, 98.4375, 
    101.25, 104.0625, 106.875, 109.6875, 112.5, 115.3125, 118.125, 120.9375, 
    123.75, 126.5625, 129.375, 132.1875, 135, 137.8125, 140.625, 143.4375, 
    146.25, 149.0625, 151.875, 154.6875, 157.5, 160.3125, 163.125, 165.9375, 
    168.75, 171.5625, 174.375, 177.1875, 180, 182.8125, 185.625, 188.4375, 
    191.25, 194.0625, 196.875, 199.6875, 202.5, 205.3125, 208.125, 210.9375, 
    213.75, 216.5625, 219.375, 222.1875, 225, 227.8125, 230.625, 233.4375, 
    236.25, 239.0625, 241.875, 244.6875, 247.5, 250.3125, 253.125, 255.9375, 
    258.75, 261.5625, 264.375, 267.1875, 270, 272.8125, 275.625, 278.4375, 
    281.25, 284.0625, 286.875, 289.6875, 292.5, 295.3125, 298.125, 300.9375, 
    303.75, 306.5625, 309.375, 312.1875, 315, 317.8125, 320.625, 323.4375, 
    326.25, 329.0625, 331.875, 334.6875, 337.5, 340.3125, 343.125, 345.9375, 
    348.75, 351.5625, 354.375, 357.1875 ;


 lat = -87.8638, -85.09653, -82.31291, -79.5256, -76.7369, -73.94752, 
    -71.15775, -68.36776, -65.57761, -62.78735, -59.99702, -57.20663, 
    -54.4162, -51.62573, -48.83524, -46.04473, -43.2542, -40.46365, 
    -37.67309, -34.88252, -32.09195, -29.30136, -26.51077, -23.72017, 
    -20.92957, -18.13897, -15.34836, -12.55776, -9.767145, -6.976533, 
    -4.185921, -1.395307, 1.395307, 4.185921, 6.976533, 9.767145, 12.55776, 
    15.34836, 18.13897, 20.92957, 23.72017, 26.51077, 29.30136, 32.09195, 
    34.88252, 37.67309, 40.46365, 43.2542, 46.04473, 48.83524, 51.62573, 
    54.4162, 57.20663, 59.99702, 62.78735, 65.57761, 68.36776, 71.15775, 
    73.94752, 76.7369, 79.5256, 82.31291, 85.09653, 87.8638 ;