    case 'am'
        pole_lat=   63.170;
        pole_lon= -122.824;
        pole_rat=    0.297;
        covar=[    223.0    -67.2   -102.2
                   -67.2    376.3    309.3
                  -102.2    309.3    535.3]*1e-10;
    case 'an'
        pole_lat=   65.423;
        pole_lon= -118.105;
        pole_rat=    0.250;
        covar=[     48.5     32.1    -20.3
                    32.1     34.1    -10.2
                   -20.3    -10.2     35.8]*1e-10;
    case 'ar'
        pole_lat=   48.881;
        pole_lon=   -8.491;
        pole_rat=    0.559;
        covar=[    208.2    182.4    112.2
                   182.4    397.7    104.1
                   112.2    104.1     87.3]*1e-10;
    case 'au'
        pole_lat=   33.861;
        pole_lon=   37.941;
        pole_rat=    0.632;
        covar=[    137.5     67.8     65.8
                    67.8    116.2      2.4
                    65.8      2.4    133.5]*1e-10;
    case 'ca'
        pole_lat=   35.196;
        pole_lon=  -92.624;
        pole_rat=    0.286;
        covar=[    105.6   -136.5     12.2
                  -136.5    485.0    -40.8
                    12.2    -40.8    164.9]*1e-10;
    case 'yz'
        pole_lat=   63.028;
        pole_lon= -116.618;
        pole_rat=    0.334;
        covar=[    178.2    -11.9     17.2
                   -11.9    282.7    104.8
                    17.2    104.8    203.4]*1e-10;
    case 'co'
        pole_lat=   26.935;
        pole_lon= -124.307;
        pole_rat=    1.198;
        covar=[    774.4    273.3   -616.2
                   273.3   1035.6   -366.5
                  -616.2   -366.5    613.1]*1e-10;
    case 'cp'
        pole_lat=   44.435;
        pole_lon=   23.088;
        pole_rat=    0.608;
        covar=[    197.1    104.6     67.8
                   104.6    696.0   -378.5
                    67.8   -378.5    369.8]*1e-10;
    case 'eu'
        pole_lat=   48.851;
        pole_lon= -106.501;
        pole_rat=    0.223;
        covar=[     67.9      4.8      6.9
                     4.8     64.6     13.9
                     6.9     13.9     87.3]*1e-10;
    case 'in'
        pole_lat=   50.372;
        pole_lon=   -3.290;
        pole_rat=    0.544;
        covar=[     65.3     79.7     32.0
                    79.7    451.3     59.4
                    32.0     59.4     48.7]*1e-10;
    case 'jf'
        pole_lat=  -38.309;
        pole_lon=   60.038;
        pole_rat=    0.951;
        covar=[  10237.1  13370.4 -15644.4
                 13370.4  17958.5 -20659.0
                -15644.4 -20659.0  25637.3]*1e-10;
    case 'lw'
        pole_lat=   51.886;
        pole_lon=  -69.519;
        pole_rat=    0.286;
        covar=[    311.9    257.0   -382.2
                   257.0    281.2   -324.0
                  -382.2   -324.0    517.3]*1e-10;
    case 'mq'
        pole_lat=   49.189;
        pole_lon=   11.052;
        pole_rat=    1.144;
        covar=[  14827.1  -6846.7  27710.6
                 -6846.7   3509.3 -13202.3
                 27710.6 -13202.3  52672.3]*1e-10;
    case 'na'
        pole_lat=   -4.855;
        pole_lon=  -80.645;
        pole_rat=    0.209;
        covar=[     58.5    -30.0    -18.1
                   -30.0    119.2     53.7
                   -18.1     53.7    108.1]*1e-10;
    case 'nb'
        pole_lat=   47.676;
        pole_lon=  -68.438;
        pole_rat=    0.292;
        covar=[     30.6     -0.4    -27.1
                    -0.4     74.5     13.2
                   -27.1     13.2     54.1]*1e-10;
    case 'OK'
        pole_lat=   30.302;
        pole_lon=  -92.281;
        pole_rat=    0.229;
        covar=[   1677.9     17.3    -46.3
                    17.3   2281.5     92.7
                   -46.3     92.7   1824.2]*1e-10;
    case 'nz'
        pole_lat=   46.235;
        pole_lon= -101.056;
        pole_rat=    0.696;
        covar=[     74.7    147.1   -120.7
                   147.1    563.6   -199.2
                  -120.7   -199.2    332.2]*1e-10;
    case 'pa'
        pole_lat=  -63.576;
        pole_lon=  114.697;
        pole_rat=    0.651;
        covar=[     43.2     31.3     -4.7
                    31.3    244.8      7.6
                    -4.7      7.6     72.5]*1e-10;
    case 'ps'
        pole_lat=  -46.024;
        pole_lon=  -31.361;
        pole_rat=    0.910;
        covar=[    955.1   -960.4   -578.1
                  -960.4   1358.2    644.3
                  -578.1    644.3    468.3]*1e-10;
    case 'sa'
        pole_lat=  -22.618;
        pole_lon= -112.833;
        pole_rat=    0.109;
        covar=[     41.7      0.3    -26.2
                     0.3     62.0     50.0
                   -26.2     50.0    102.1]*1e-10;
    case 'sc'
        pole_lat=   22.524;
        pole_lon= -106.148;
        pole_rat=    0.146;
        covar=[    243.8   -295.9   -755.7
                  -295.9    519.9   1161.1
                  -755.7   1161.1   3784.2]*1e-10;
    case 'sm'
        pole_lat=   49.951;
        pole_lon=  -84.515;
        pole_rat=    0.339;
        covar=[     32.5     47.2     -2.4
                    47.2    163.0     -6.2
                    -2.4     -6.2     37.2]*1e-10;
    case 'sr'
        pole_lat=  -32.496;
        pole_lon= -111.322;
        pole_rat=    0.107;
        covar=[   1589.8   -158.4  -2228.4
                  -158.4     92.7    322.4
                 -2228.4    322.4   3339.9]*1e-10;
    case 'su'
        pole_lat=   50.056;
        pole_lon=  -95.022;
        pole_rat=    0.337;
        covar=[    216.4   -131.3     20.6
                  -131.3    942.6    185.3
                    20.6    185.3    189.6]*1e-10;
    case 'sw'
        pole_lat=  -29.942;
        pole_lon=  -36.867;
        pole_rat=    1.362;
        covar=[ 130548.9 -65657.6-228089.2
                -65657.6  35924.6 116372.0
               -228089.2 116372.0 402767.5]*1e-10;
