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                6.6 +/-    1.19      14.7 +/-    1.19  0.160 / 0.260
G06     175.8          34.0               10.8 +/-    1.27      17.4 +/-    1.27  0.130 / 0.260
G13     244.2          25.5               10.3 +/-    1.43      19.8 +/-    1.43  0.090 / 0.210
G15     279.3          13.7                8.4 +/-    1.62      21.5 +/-    1.62  0.080 / 0.160
G17     357.7          73.0                9.5 +/-    0.89       9.8 +/-    0.89  0.080 / 0.170
G19     267.1          68.2                7.8 +/-    0.73       8.4 +/-    0.73  0.080 / 0.180
G24     318.6          13.4                7.9 +/-    2.98      20.4 +/-    2.98  0.060 / 0.090
G28     64.8           49.2                9.0 +/-    0.79      11.5 +/-    0.79  0.060 / 0.100
G30     153.3          35.1                9.5 +/-    1.31      15.0 +/-    1.31  0.030 / 0.040