PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-16:28:00
G02     24.4           62.7               12.9 +/-    0.98      14.3 +/-    0.98  0.140 / 0.070
G05     156.4          52.2               15.9 +/-    0.60      19.5 +/-    0.60  0.160 / 0.090
G06     49.3           23.7               11.1 +/-    2.24      22.4 +/-    2.24  0.030 / 0.020
G12     220.7          76.2               12.0 +/-    0.33      12.3 +/-    0.33  0.030 / 0.020
G19     94.2           13.3               12.1 +/-    2.18      31.4 +/-    2.18  0.050 / 0.040
G20     197.7          18.2               15.2 +/-    3.02      35.0 +/-    3.02  0.040 / 0.030
G25     305.4          49.8               12.2 +/-    3.78      15.5 +/-    3.78  0.180 / 0.400
G29     303.5          25.8               10.6 +/-    2.46      20.4 +/-    2.46  0.240 / 0.390