PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-16:42:40
G01     44.0           19.7                8.4 +/-    2.63      18.7 +/-    2.63  0.060 / 0.070
G06     175.8          34.0                9.6 +/-    1.56      15.5 +/-    1.56  0.060 / 0.080
G13     244.2          25.5                8.8 +/-    2.32      17.1 +/-    2.32  0.180 / 0.360
G17     357.7          73.0                9.3 +/-    0.48       9.7 +/-    0.48  0.190 / 0.420
G19     267.1          68.2                8.4 +/-    0.76       9.0 +/-    0.76  0.130 / 0.230
G24     318.6          13.4                7.9 +/-    4.05      20.3 +/-    4.05  0.100 / 0.290
G28     64.8           49.2                9.6 +/-    1.28      12.2 +/-    1.28  0.030 / 0.030
G30     153.3          35.1               10.0 +/-    0.45      15.8 +/-    0.45  0.020 / 0.020