PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/12-18:42:30
G02     16.2           67.0                5.9 +/-    0.77       6.3 +/-    0.77  0.030 / 0.040
G05     154.6          50.7               10.3 +/-    0.88      12.9 +/-    0.88  0.040 / 0.060
G06     48.4           23.2                6.8 +/-    0.55      13.9 +/-    0.55  0.020 / 0.030
G12     209.6          77.6                7.0 +/-    1.04       7.1 +/-    1.04  0.020 / 0.030
G19     88.8           19.8                9.1 +/-    0.66      20.2 +/-    0.66  0.040 / 0.050
G25     309.7          45.2                6.6 +/-    2.29       8.9 +/-    2.29  0.040 / 0.050
G29     298.1          18.3                7.5 +/-    1.55      17.1 +/-    1.55  0.060 / 0.090