PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/12-14:12:40
G02     235.8          71.9                6.8 +/-    0.51       7.1 +/-    0.51  0.060 / 0.080
G05     173.8          13.1                7.7 +/-    3.10      20.0 +/-    3.10  0.080 / 0.090
G06     41.1           59.3                6.7 +/-    0.47       7.7 +/-    0.47  0.060 / 0.110
G12     321.3          50.3                6.3 +/-    0.85       7.9 +/-    0.85  0.060 / 0.100
G17     67.6           25.3                7.2 +/-    0.64      13.9 +/-    0.64  0.050 / 0.070
G19     56.0           38.2                7.8 +/-    1.08      11.7 +/-    1.08  0.050 / 0.050
G24     248.8          35.7                7.8 +/-    1.92      12.3 +/-    1.92  0.040 / 0.040