PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-18:27:50
G01     104.4          27.0               11.0 +/-    1.66      20.6 +/-    1.66  0.250 / 0.410
G07     110.7          56.6               12.3 +/-    0.41      14.4 +/-    0.41  0.270 / 0.530
G08     42.0           20.1                9.3 +/-    2.12      20.5 +/-    2.12  0.040 / 0.030
G09     174.4          11.4               13.7 +/-    4.72      37.2 +/-    4.72  0.030 / 0.030
G11     86.4           43.1               11.2 +/-    0.93      15.5 +/-    0.93  0.080 / 0.120
G13     307.5          30.1               11.0 +/-    0.61      19.2 +/-    0.61  0.070 / 0.140
G17     207.9          37.6               13.4 +/-    0.68      20.3 +/-    0.68  0.040 / 0.040
G18     77.8           24.7               10.8 +/-    1.38      21.2 +/-    1.38  0.030 / 0.050
G28     323.8          61.4               10.2 +/-    0.83      11.5 +/-    0.83  0.030 / 0.060
G30     41.7           79.1               12.7 +/-    0.97      12.9 +/-    0.97  0.030 / 0.040