PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-18:42:40
G02     71.0           23.6               19.9 +/-    1.33      40.2 +/-    1.33  0.090 / 0.080
G05     47.3           51.9               19.8 +/-    0.69      24.5 +/-    0.69  0.060 / 0.110
G12     182.5          18.4               26.1 +/-    1.33      59.7 +/-    1.33  0.140 / 0.120
G13     117.9          24.7               24.2 +/-    3.17      47.6 +/-    3.17  0.090 / 0.160
G15     155.8          23.7               26.8 +/-    3.54      54.1 +/-    3.54  0.140 / 0.170
G18     222.7          13.6               22.0 +/-    5.91      56.6 +/-    5.91  0.090 / 0.150
G20     221.2          76.1               22.5 +/-    0.43      23.1 +/-    0.43  0.050 / 0.030
G21     283.5          27.4               16.6 +/-    0.76      30.8 +/-    0.76  0.050 / 0.030
G25     217.2          38.9               23.9 +/-    1.44      35.4 +/-    1.44  0.030 / 0.030
G29     346.2          73.2               19.5 +/-    0.98      20.3 +/-    0.98  0.040 / 0.040