PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-14:28:10
G01     92.7           31.2                7.4 +/-    0.45      12.7 +/-    0.45  0.030 / 0.040
G07     123.4          47.5                6.8 +/-    0.76       8.9 +/-    0.76  0.030 / 0.030
G11     70.6           40.2                7.7 +/-    0.43      11.1 +/-    0.43  0.040 / 0.070
G13     296.9          35.4                7.1 +/-    1.17      11.2 +/-    1.17  0.040 / 0.070
G17     212.8          51.5               11.0 +/-    1.42      13.7 +/-    1.42  0.090 / 0.120
G18     65.7           24.1                7.1 +/-    1.19      14.1 +/-    1.19  0.100 / 0.100
G19     213.9          22.3               10.1 +/-    0.87      21.0 +/-    0.87  0.040 / 0.050
G28     344.4          61.8                6.3 +/-    0.73       7.1 +/-    0.73  0.040 / 0.060
G30     92.7           78.4                6.4 +/-    0.52       6.6 +/-    0.52  0.030 / 0.060