PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-07:27:40
G08     301.2          20.9                4.5 +/-    1.81       9.8 +/-    1.81  0.050 / 0.090
G10     355.4          62.5                3.3 +/-    0.83       3.7 +/-    0.83  0.050 / 0.070
G14     225.4          36.7                4.9 +/-    1.51       7.6 +/-    1.51  0.060 / 0.130
G20     75.3           38.9                3.7 +/-    0.63       5.5 +/-    0.63  0.060 / 0.130
G21     143.5          46.1                7.2 +/-    0.71       9.6 +/-    0.71  0.110 / 0.320
G24     61.0           27.5                3.0 +/-    0.47       5.6 +/-    0.47  0.120 / 0.290
G27     259.9          34.1                6.9 +/-    0.97      11.2 +/-    0.97  0.050 / 0.030
G32     237.6          65.1                9.4 +/-    0.56      10.3 +/-    0.56  0.040 / 0.030