PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-20:28:00
G01     56.7           29.0               24.1 +/-    1.04      43.1 +/-    1.04  0.120 / 0.330
G06     180.7          15.5               -4.0 +/-   52.96      -9.8 +/-   52.96  0.120 / 0.290
G07     142.6          13.7               17.3 +/-    1.53      44.4 +/-    1.53  0.040 / 0.050
G11     46.4           20.7                9.5 +/-    1.24      20.5 +/-    1.24  0.030 / 0.060
G13     258.1          34.8               14.7 +/-    0.83      23.5 +/-    0.83  0.050 / 0.060
G15     290.2          16.6               11.4 +/-    1.99      27.2 +/-    1.99  0.050 / 0.070
G17     272.7          78.6               15.3 +/-    0.48      15.6 +/-    0.48  0.050 / 0.110
G19     235.2          53.7               14.6 +/-    1.23      17.7 +/-    1.23  0.060 / 0.110
G28     33.1           58.0               12.6 +/-    0.62      14.5 +/-    0.62  0.200 / 0.490
G30     145.3          47.5               16.3 +/-    0.57      21.2 +/-    0.57  0.200 / 0.380