PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-15:27:50
G02     18.1           65.5                5.3 +/-    0.39       5.7 +/-    0.39  0.060 / 0.070
G05     156.9          51.5                9.2 +/-    0.68      11.4 +/-    0.68  0.050 / 0.060
G06     49.2           22.3                5.3 +/-    0.97      11.1 +/-    0.97  0.020 / 0.030
G12     209.7          76.1                6.3 +/-    0.66       6.5 +/-    0.66  0.020 / 0.030
G19     90.7           18.9                8.0 +/-    0.72      18.0 +/-    0.72  0.030 / 0.050
G25     306.1          49.2                7.4 +/-    0.86       9.4 +/-    0.86  0.030 / 0.050
G29     300.4          20.8                7.0 +/-    1.26      15.0 +/-    1.26  0.070 / 0.130