PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-03:42:40
G01     52.1           26.7                2.7 +/-    2.40       5.1 +/-    2.40  0.040 / 0.060
G06     180.4          20.5                7.4 +/-    1.85      16.2 +/-    1.85  0.030 / 0.050
G07     145.6          14.6                7.4 +/-    3.39      18.7 +/-    3.39  0.130 / 0.190
G11     45.9           18.6                3.3 +/-    3.13       7.4 +/-    3.13  0.080 / 0.150
G13     254.0          31.5                4.0 +/-    3.08       6.7 +/-    3.08  0.020 / 0.020
G15     285.0          16.4                4.4 +/-    2.24      10.5 +/-    2.24  0.030 / 0.020
G17     298.7          78.6                6.1 +/-    0.38       6.2 +/-    0.38  0.170 / 0.220
G19     243.9          58.9                5.7 +/-    1.32       6.5 +/-    1.32  0.120 / 0.180
G28     50.1           53.3                4.6 +/-    0.82       5.5 +/-    0.82  0.150 / 0.370
G30     147.6          40.1                7.1 +/-    0.68      10.4 +/-    0.68  0.130 / 0.370