PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-23:57:40
G01     319.3          17.5                5.4 +/-    0.75      12.5 +/-    0.75  0.040 / 0.060
G08     256.4          13.5                8.8 +/-    0.78      22.7 +/-    0.78  0.040 / 0.050
G10     79.2           53.1                8.6 +/-    0.31      10.5 +/-    0.31  0.130 / 0.220
G11     302.8          23.4                7.4 +/-    1.14      15.1 +/-    1.14  0.130 / 0.290
G14     293.6          70.3                9.7 +/-    0.40      10.2 +/-    0.40  0.180 / 0.240
G18     304.4          41.0                8.1 +/-    1.41      11.6 +/-    1.41  0.180 / 0.260
G20     104.9          29.5               10.2 +/-    0.72      18.1 +/-    0.72  0.080 / 0.220
G31     175.9          41.6               12.1 +/-    0.59      17.1 +/-    0.59  0.090 / 0.210
G32     8.7            67.3                7.1 +/-    0.65       7.6 +/-    0.65  0.050 / 0.100