transform a projection into regular lat-lon

Dear NCL users, I have a model output file having info as in the below. I was told it is "rotated projection" (I don't know exactly what it is). Could any one help give me a suggestion how to transform this data into regular lat-lon projection? The main issue is how to define its projection when reading it with NCL? Thanks so much in advance! Mark Chan ----------------------Data file info ------------------------    dimensions:       ncl_scalar = 1       rlat = 92       rlon = 108       time = 87648  // unlimited       height_2m = 1    variables:       double time ( time )          standard_name :    time          units :    seconds since 1989-01-01 00:00:00          calendar :    standard       float rlon ( rlon )          standard_name :    grid_longitude          units :    degrees       float rlat ( rlat )          standard_name :    grid_latitude          units :    degrees       float lon ( rlat, rlon )          standard_name :    longitude          units :    degrees_east       float lat ( rlat, rlon )          standard_name :    latitude          units :    degrees_north       float height_2m ( height_2m )          long_name :    height above surface          units :    m       character rotated_pole ( ncl_scalar )          long_name :    coordinates of the rotated North Pole          grid_mapping_name :    rotated_latitude_longitude          grid_north_pole_latitude :    39.25          grid_north_pole_longitude :    -162       short tas ( time, height_2m, rlat, rlon )          standard_name :    air_temperature          long_name :    2m temperature          units :    K          coordinates :    lon lat          scale_factor :    0.004940663          add_offset :    161.8932 ==================================== -----------------Its grids info is as----------------------------------------------------- rlon = -10.445, -10.335, -10.225, -10.115, -10.005, -9.895, -9.785, -9.675,     -9.565, -9.455, -9.345, -9.235, -9.125, -9.015, -8.905, -8.795, -8.685,     -8.575, -8.465, -8.355, -8.245, -8.135, -8.025, -7.915, -7.805, -7.695,     -7.585, -7.475, -7.365, -7.255, -7.145, -7.035, -6.925, -6.815, -6.705,     -6.595, -6.485, -6.375, -6.265, -6.155, -6.045, -5.935, -5.825, -5.715,     -5.605, -5.495, -5.385, -5.275, -5.165, -5.055, -4.945, -4.835, -4.725,     -4.615, -4.505, -4.395, -4.285, -4.175, -4.065, -3.955, -3.845, -3.735,     -3.625, -3.515, -3.405, -3.295, -3.185, -3.075, -2.965, -2.855, -2.745,     -2.635, -2.525, -2.415, -2.305, -2.195, -2.085, -1.975, -1.865, -1.755,     -1.645, -1.535, -1.425, -1.315, -1.205, -1.095, -0.985, -0.875, -0.765,     -0.655, -0.545, -0.435, -0.325, -0.215, -0.105, 0.005, 0.115, 0.225,     0.335, 0.445, 0.555, 0.665, 0.775, 0.885, 0.995, 1.105, 1.215, 1.325 ;  rlat = -8.855, -8.745, -8.635, -8.525, -8.415, -8.305, -8.195, -8.085,     -7.975, -7.865, -7.755, -7.645, -7.535, -7.425, -7.315, -7.205, -7.095,     -6.985, -6.875, -6.765, -6.655, -6.545, -6.435, -6.325, -6.215, -6.105,     -5.995, -5.885, -5.775, -5.665, -5.555, -5.445, -5.335, -5.225, -5.115,     -5.005, -4.895, -4.785, -4.675, -4.565, -4.455, -4.345, -4.235, -4.125,     -4.015, -3.905, -3.795, -3.685, -3.575, -3.465, -3.355, -3.245, -3.135,     -3.025, -2.915, -2.805, -2.695, -2.585, -2.475, -2.365, -2.255, -2.145,     -2.035, -1.925, -1.815, -1.705, -1.595, -1.485, -1.375, -1.265, -1.155,     -1.045, -0.935, -0.825, -0.715, -0.605, -0.495, -0.385, -0.275, -0.165,     -0.055, 0.055, 0.165, 0.275, 0.385, 0.495, 0.605, 0.715, 0.825, 0.935,     1.045, 1.155 ;

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Received on Mon Feb 27 03:32:36 2012