PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-18:57:30
G05     52.2           10.6                8.3 +/-    1.60      23.0 +/-    1.60  0.040 / 0.110
G10     243.0          21.7               13.2 +/-    1.85      27.9 +/-    1.85  0.040 / 0.070
G13     62.3           33.0                8.2 +/-    1.45      13.6 +/-    1.45  0.060 / 0.130
G15     106.2          57.3               10.2 +/-    0.81      11.9 +/-    0.81  0.070 / 0.110
G16     304.4          15.3                6.9 +/-    1.96      17.0 +/-    1.96  0.030 / 0.030
G20     259.4          45.6               12.4 +/-    2.47      16.6 +/-    2.47  0.030 / 0.030
G21     323.1          53.0               10.0 +/-    0.83      12.2 +/-    0.83  0.110 / 0.240
G26     277.1          18.5                9.8 +/-    0.58      22.5 +/-    0.58  0.120 / 0.200
G29     160.1          61.5               11.8 +/-    0.43      13.2 +/-    0.43  0.110 / 0.310