PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-14:43:00
G01     94.0           30.8                8.8 +/-    0.94      15.1 +/-    0.94  0.030 / 0.020
G07     122.3          48.4                9.0 +/-    0.46      11.6 +/-    0.46  0.030 / 0.020
G08     42.1           9.8                 7.0 +/-    3.08      19.7 +/-    3.08  0.040 / 0.040
G11     72.0           40.7                8.0 +/-    0.64      11.6 +/-    0.64  0.030 / 0.040
G13     298.1          35.0                9.1 +/-    2.17      14.4 +/-    2.17  0.070 / 0.100
G17     212.1          50.2               10.9 +/-    0.89      13.7 +/-    0.89  0.120 / 0.110
G18     66.9           24.3                8.8 +/-    1.45      17.5 +/-    1.45  0.100 / 0.120
G19     213.5          21.4                9.7 +/-    2.02      20.7 +/-    2.02  0.080 / 0.110
G28     342.3          61.9                8.0 +/-    0.73       9.0 +/-    0.73  0.100 / 0.120
G30     87.7           78.8                9.0 +/-    0.79       9.1 +/-    0.79  0.090 / 0.090