igrf90
10  6371.2 1990.0
   1  0  -29775.4      0.0
   1  1   -1851.0   5410.9
   2  0   -2135.8      0.0
   2  1    3058.2  -2277.7
   2  2    1693.2   -380.0
   3  0    1314.6      0.0
   3  1   -2240.2   -286.5
   3  2    1245.6    293.3
   3  3     806.5   -348.5
   4  0     938.9      0.0
   4  1     782.3    248.1
   4  2     323.9   -239.5
   4  3    -422.7     87.0
   4  4     141.7   -299.4
   5  0    -211.0      0.0
   5  1     352.5     47.2
   5  2     243.8    153.5
   5  3    -110.8   -154.4
   5  4    -165.6    -69.2
   5  5     -37.0     97.7
   6  0      60.7      0.0
   6  1      63.9    -15.8
   6  2      60.4     82.7
   6  3    -177.5     68.3
   6  4       2.0    -52.5
   6  5      16.7      1.8
   6  6     -96.3     26.9
   7  0      76.6      0.0
   7  1     -64.2    -81.1
   7  2       3.7    -27.3
   7  3      27.5      0.6
   7  4       0.9     20.4
   7  5       5.7     16.4
   7  6       9.8    -22.6
   7  7      -0.5     -5.0
   8  0      22.4      0.0
   8  1       5.1      9.7
   8  2      -0.9    -19.9
   8  3     -10.8      7.1
   8  4     -12.4    -22.1
   8  5       3.8     11.9
   8  6       3.8     11.0
   8  7       2.6    -16.0
   8  8      -6.0    -10.7
   9  0       4.4      0.0
   9  1       9.9    -20.8
   9  2       0.8     15.4
   9  3     -12.0      9.5
   9  4       9.3     -5.7
   9  5      -3.9     -6.4
   9  6      -1.4      8.6
   9  7       7.3      9.1
   9  8       1.5     -6.6
   9  9      -5.5      1.9
   10  0      -3.6      0.0
   10  1      -3.9      1.3
   10  2       2.4      0.4
   10  3      -5.3      3.1
   10  4      -2.4      5.6
   10  5       4.4     -4.2
   10  6       3.0     -0.5
   10  7       1.2     -1.5
   10  8       2.2      3.8
   10  9       2.9     -0.5
   10  10       0.0     -6.2