PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-16:27:50
G01     50.5           25.6                7.9 +/-    1.11      15.2 +/-    1.11  0.030 / 0.060
G06     177.7          23.1               10.4 +/-    0.92      21.2 +/-    0.92  0.040 / 0.060
G11     44.7           16.3                5.5 +/-    2.07      13.3 +/-    2.07  0.120 / 0.380
G13     250.7          31.8               13.2 +/-    1.19      22.2 +/-    1.19  0.130 / 0.410
G15     284.5          15.9               11.1 +/-    2.33      26.9 +/-    2.33  0.080 / 0.120
G17     295.2          78.5               10.7 +/-    0.87      10.9 +/-    0.87  0.080 / 0.120
G19     244.1          60.0               11.7 +/-    0.60      13.3 +/-    0.60  0.040 / 0.030
G28     41.9           56.8                9.5 +/-    0.96      11.1 +/-    0.96  0.030 / 0.030
G30     148.5          40.6               11.6 +/-    1.16      16.8 +/-    1.16  0.050 / 0.060