PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-16:27:50
G02     23.3           62.2                7.8 +/-    0.63       8.7 +/-    0.63  0.020 / 0.030
G05     151.2          56.8               10.4 +/-    0.60      12.2 +/-    0.60  0.020 / 0.030
G06     51.6           18.3                5.7 +/-    2.46      13.0 +/-    2.46  0.040 / 0.030
G12     197.4          70.8                9.1 +/-    0.79       9.6 +/-    0.79  0.030 / 0.030
G19     94.7           16.2                7.8 +/-    1.26      18.9 +/-    1.26  0.040 / 0.060
G25     301.0          52.4                8.4 +/-    1.70      10.3 +/-    1.70  0.050 / 0.040
G29     303.8          24.0                6.9 +/-    1.37      13.9 +/-    1.37  0.110 / 0.250