PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/06-15:27:50
G02     206.8          42.4               18.0 +/-    0.88      25.3 +/-    0.88  0.090 / 0.060
G06     138.5          77.3               18.9 +/-    0.47      19.3 +/-    0.47  0.060 / 0.060
G12     312.6          22.6               15.2 +/-    0.92      31.4 +/-    0.92  0.110 / 0.110
G17     46.5           40.4               15.7 +/-    0.99      22.7 +/-    0.99  0.080 / 0.110
G19     22.3           58.1               16.8 +/-    1.49      19.4 +/-    1.49  0.060 / 0.070
G24     289.0          40.7               15.1 +/-    5.52      21.7 +/-    5.52  0.030 / 0.050
G28     111.4          24.4               16.7 +/-    1.84      33.1 +/-    1.84  0.050 / 0.060