PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-18:43:00
G02     31.0           57.0                9.1 +/-    0.98      10.6 +/-    0.98  0.030 / 0.040
G05     139.0          62.6               10.4 +/-    0.37      11.6 +/-    0.37  0.030 / 0.060
G06     54.8           13.3                8.3 +/-    1.39      21.5 +/-    1.39  0.050 / 0.050
G12     188.9          63.6                9.1 +/-    0.53      10.1 +/-    0.53  0.050 / 0.050
G19     99.4           12.2                9.0 +/-    1.10      23.9 +/-    1.10  0.030 / 0.040
G25     294.8          54.8                7.5 +/-    4.30       8.9 +/-    4.30  0.030 / 0.040
G29     307.1          27.2                7.1 +/-    1.92      13.2 +/-    1.92  0.130 / 0.230