PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-14:57:50
G10     248.5          24.3                4.2 +/-    1.25       8.3 +/-    1.25  0.030 / 0.060
G13     56.7           32.2                4.5 +/-    0.66       7.6 +/-    0.66  0.030 / 0.060
G15     88.8           56.9                6.3 +/-    0.74       7.3 +/-    0.74  0.030 / 0.060
G16     302.0          13.8                1.1 +/-    1.59       2.8 +/-    1.59  0.030 / 0.060
G18     267.5          56.3                5.7 +/-    0.96       6.7 +/-    0.96  0.110 / 0.390
G20     38.5           53.5                3.3 +/-    0.49       4.0 +/-    0.49  0.110 / 0.370
G21     338.5          62.3                3.0 +/-    0.56       3.3 +/-    0.56  0.090 / 0.360
G26     272.4          16.3                5.1 +/-    2.81      12.3 +/-    2.81  0.110 / 0.290
G29     162.1          48.5                7.9 +/-    0.52      10.1 +/-    0.52  0.030 / 0.040