PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-14:42:40
G01     54.6           27.9                8.7 +/-    1.98      15.9 +/-    1.98  0.170 / 0.190
G06     179.0          20.0               12.0 +/-    1.50      26.3 +/-    1.50  0.090 / 0.250
G07     144.1          14.5               11.5 +/-    2.11      28.9 +/-    2.11  0.140 / 0.330
G11     45.5           16.9                8.5 +/-    1.88      20.3 +/-    1.88  0.130 / 0.360
G13     258.6          32.8                8.5 +/-    1.83      14.1 +/-    1.83  0.080 / 0.140
G15     291.2          15.8                8.0 +/-    2.24      19.4 +/-    2.24  0.060 / 0.120
G17     299.3          80.0               12.3 +/-    0.62      12.4 +/-    0.62  0.030 / 0.040
G19     240.2          57.8               12.8 +/-    2.06      14.8 +/-    2.06  0.040 / 0.050
G28     44.9           54.7               10.9 +/-    0.62      13.1 +/-    0.62  0.020 / 0.020
G30     147.0          48.8               10.6 +/-    0.68      13.5 +/-    0.68  0.030 / 0.020