PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-17:13:00
G02     69.4           25.3                8.1 +/-    1.32      15.6 +/-    1.32  0.040 / 0.050
G05     47.1           51.0                7.0 +/-    0.44       8.8 +/-    0.44  0.030 / 0.040
G12     180.9          18.9                9.5 +/-    2.51      21.6 +/-    2.51  0.090 / 0.220
G13     115.3          23.5               10.5 +/-    2.06      21.2 +/-    2.06  0.090 / 0.230
G15     156.6          23.4               10.6 +/-    1.21      21.6 +/-    1.21  0.090 / 0.290
G20     225.3          10.1               -6.8 +/-   15.40     -18.9 +/-   15.40  0.080 / 0.250
G21     282.4          24.6                9.3 +/-    1.48      18.4 +/-    1.48  0.110 / 0.310
G25     222.1          41.8                9.3 +/-    2.41      13.1 +/-    2.41  0.150 / 0.280
G26     318.6          10.6              -10.8 +/-   34.49     -29.8 +/-   34.49  0.070 / 0.130
G29     337.9          67.1                6.6 +/-    0.79       7.1 +/-    0.79  0.090 / 0.140