PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-19:43:00
G01     118.4          17.8               13.4 +/-    1.11      31.1 +/-    1.11  0.040 / 0.040
G07     89.7           61.5               12.3 +/-    0.90      13.8 +/-    0.90  0.030 / 0.040
G08     44.5           30.2                9.9 +/-    1.51      17.2 +/-    1.51  0.280 / 0.470
G09     177.5          26.9               12.4 +/-    1.37      23.2 +/-    1.37  0.150 / 0.470
G11     104.6          40.6               13.4 +/-    0.69      19.3 +/-    0.69  0.080 / 0.060
G13     317.2          20.4                9.0 +/-    1.83      19.6 +/-    1.83  0.080 / 0.080
G17     200.8          25.7               12.6 +/-    1.87      24.2 +/-    1.87  0.110 / 0.160
G18     91.3           20.7               13.1 +/-    1.42      28.3 +/-    1.42  0.100 / 0.150
G28     286.9          54.7               11.4 +/-    1.73      13.7 +/-    1.73  0.040 / 0.030
G30     349.5          69.8               11.5 +/-    0.54      12.1 +/-    0.54  0.040 / 0.030