PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-14:13:10
G05     49.9           14.6                3.0 +/-    3.00       7.4 +/-    3.00  0.100 / 0.190
G10     238.1          13.9                2.0 +/-    1.24       5.0 +/-    1.24  0.120 / 0.190
G13     73.3           36.9                5.1 +/-    0.99       7.8 +/-    0.99  0.030 / 0.030
G15     116.7          53.9                6.2 +/-    0.41       7.5 +/-    0.41  0.030 / 0.030
G16     314.9          11.2                1.1 +/-    5.51       2.9 +/-    5.51  0.080 / 0.160
G18     249.3          46.5                4.3 +/-    4.02       5.7 +/-    4.02  0.080 / 0.160
G20     25.8           66.6                3.2 +/-    0.56       3.4 +/-    0.56  0.040 / 0.070
G21     320.6          52.9                2.5 +/-    0.60       3.1 +/-    0.60  0.050 / 0.080
G26     286.6          19.5                2.2 +/-    1.02       4.8 +/-    1.02  0.120 / 0.280
G29     155.4          64.8                5.5 +/-    0.41       6.0 +/-    0.41  0.160 / 0.390