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               19.1 +/-    0.83      38.7 +/-    0.83  0.090 / 0.340
G05     47.3           51.9               17.1 +/-    0.94      21.1 +/-    0.94  0.090 / 0.260
G12     182.5          18.4               26.6 +/-    1.46      60.9 +/-    1.46  0.070 / 0.180
G13     117.9          24.7               22.6 +/-    1.59      44.5 +/-    1.59  0.070 / 0.180
G15     155.8          23.7               27.7 +/-    1.29      55.8 +/-    1.29  0.070 / 0.100
G18     222.7          13.6               22.4 +/-    2.39      57.7 +/-    2.39  0.060 / 0.100
G20     221.2          76.1               21.2 +/-    0.47      21.7 +/-    0.47  0.030 / 0.040
G21     283.5          27.4               15.4 +/-    1.39      28.5 +/-    1.39  0.030 / 0.050
G25     217.2          38.9               24.5 +/-    1.68      36.3 +/-    1.68  0.070 / 0.220
G29     346.2          73.2               19.4 +/-    0.71      20.2 +/-    0.71  0.060 / 0.200