PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-04:27:40
G01     61.2           30.9                3.6 +/-    0.80       6.2 +/-    0.80  0.040 / 0.040
G06     182.9          11.3               -8.7 +/-   30.82     -23.7 +/-   30.82  0.030 / 0.040
G07     141.8          23.1                6.1 +/-    1.46      12.5 +/-    1.46  0.020 / 0.020
G11     49.5           25.5                3.2 +/-    1.93       6.2 +/-    1.93  0.030 / 0.020
G13     265.0          35.3                6.5 +/-    2.24      10.2 +/-    2.24  0.090 / 0.140
G15     294.1          16.8                3.0 +/-    0.88       7.0 +/-    0.88  0.110 / 0.110
G17     256.2          75.8                5.4 +/-    0.51       5.6 +/-    0.51  0.120 / 0.160
G19     232.1          50.9                6.1 +/-    2.29       7.6 +/-    2.29  0.090 / 0.170
G28     35.4           56.6                4.4 +/-    0.83       5.1 +/-    0.83  0.130 / 0.320
G30     142.3          50.3                5.2 +/-    0.46       6.6 +/-    0.46  0.140 / 0.300