PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-14:27:50
G02     263.5          78.5                7.7 +/-    0.36       7.8 +/-    0.36  0.110 / 0.140
G05     170.7          20.6                7.8 +/-    2.12      17.0 +/-    2.12  0.090 / 0.100
G06     39.7           50.7                6.8 +/-    0.82       8.5 +/-    0.82  0.090 / 0.160
G12     320.8          59.3                6.5 +/-    0.96       7.5 +/-    0.96  0.060 / 0.130
G17     74.8           20.2                7.1 +/-    2.69      15.6 +/-    2.69  0.050 / 0.080
G19     64.3           32.7                6.8 +/-    1.14      11.3 +/-    1.14  0.050 / 0.110
G24     240.0          30.8                7.1 +/-    1.94      12.3 +/-    1.94  0.060 / 0.050
G25     317.1          17.0                4.6 +/-    2.31      11.0 +/-    2.31  0.060 / 0.030