PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-12:43:10
G10     250.4          26.0                4.4 +/-    1.85       8.4 +/-    1.85  0.040 / 0.050
G13     54.3           30.8                3.1 +/-    1.06       5.3 +/-    1.06  0.040 / 0.040
G15     83.9           56.4                3.0 +/-    0.33       3.5 +/-    0.33  0.110 / 0.370
G16     298.2          14.5                2.1 +/-    2.49       5.2 +/-    2.49  0.120 / 0.400
G18     271.7          58.3                5.6 +/-    0.63       6.5 +/-    0.63  0.030 / 0.060
G20     39.0           52.9                2.6 +/-    0.60       3.2 +/-    0.60  0.040 / 0.050
G21     338.7          62.5                3.4 +/-    0.35       3.8 +/-    0.35  0.100 / 0.400
G26     268.9          15.6                6.0 +/-    2.84      14.8 +/-    2.84  0.100 / 0.310
G29     163.5          47.4                4.9 +/-    1.92       6.4 +/-    1.92  0.070 / 0.110