PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-13:57:30
G02     200.2          15.1                8.1 +/-    4.29      20.0 +/-    4.29  0.330 / 0.280
G06     173.5          48.2                8.3 +/-    0.77      10.8 +/-    0.77  0.300 / 0.300
G13     232.6          16.4                8.6 +/-    2.32      20.7 +/-    2.32  0.120 / 0.210
G17     20.4           61.5                7.0 +/-    0.48       7.8 +/-    0.48  0.080 / 0.160
G19     314.1          72.1                6.0 +/-    0.33       6.2 +/-    0.33  0.040 / 0.030
G24     313.8          24.8                4.2 +/-    1.51       8.2 +/-    1.51  0.030 / 0.030
G28     83.2           41.9                5.3 +/-    1.23       7.5 +/-    1.23  0.040 / 0.060
G30     156.8          20.2                7.3 +/-    1.13      16.0 +/-    1.13  0.050 / 0.070