PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-16:27:40
G01     48.7           24.1                6.8 +/-    0.78      13.5 +/-    0.78  0.060 / 0.160
G06     177.2          27.0                9.7 +/-    1.73      18.2 +/-    1.73  0.060 / 0.190
G11     43.6           10.9                7.4 +/-    1.10      20.3 +/-    1.10  0.050 / 0.130
G13     250.9          29.4                9.6 +/-    2.48      17.1 +/-    2.48  0.050 / 0.110
G15     285.7          14.9                6.9 +/-    2.23      17.3 +/-    2.23  0.040 / 0.070
G17     336.0          77.7               10.2 +/-    0.80      10.4 +/-    0.80  0.050 / 0.070
G19     251.5          63.5                7.6 +/-    0.90       8.4 +/-    0.90  0.020 / 0.030
G28     55.1           52.1                8.6 +/-    0.37      10.6 +/-    0.37  0.030 / 0.030
G30     150.6          42.1               10.2 +/-    0.69      14.4 +/-    0.69  0.170 / 0.290