PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-17:58:10
G02     229.8          69.8                7.1 +/-    0.39       7.5 +/-    0.39  0.080 / 0.120
G05     173.7          11.5               -0.3 +/-   18.93      -0.7 +/-   18.93  0.080 / 0.130
G06     42.7           63.6                5.8 +/-    0.43       6.4 +/-    0.43  0.340 / 0.440
G12     320.5          45.0                7.0 +/-    0.43       9.4 +/-    0.43  0.320 / 0.530
G17     64.6           27.8                6.4 +/-    2.31      11.7 +/-    2.31  0.050 / 0.060
G19     52.3           40.7                7.1 +/-    0.80      10.3 +/-    0.80  0.060 / 0.060
G24     251.7          37.4                9.0 +/-    1.17      13.6 +/-    1.17  0.050 / 0.120
G28     128.1          10.5               10.1 +/-    2.85      27.9 +/-    2.85  0.060 / 0.090