PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-07:57:50
G01     126.5          10.5               -4.1 +/-   29.04     -11.3 +/-   29.04  0.030 / 0.030
G07     53.4           69.0                5.6 +/-    0.89       6.0 +/-    0.89  0.030 / 0.030
G08     53.1           42.8                4.2 +/-    0.99       5.9 +/-    0.99  0.190 / 0.260
G09     177.3          37.1                5.2 +/-    0.96       7.9 +/-    0.96  0.240 / 0.450
G11     121.6          35.4                6.0 +/-    0.69       9.5 +/-    0.69  0.050 / 0.070
G13     321.0          11.7               -2.4 +/-   13.10      -6.4 +/-   13.10  0.060 / 0.080
G17     199.9          11.5               -4.1 +/-   15.52     -11.0 +/-   15.52  0.040 / 0.050
G18     104.3          16.0                4.9 +/-    2.11      12.0 +/-    2.11  0.050 / 0.060
G28     266.8          46.2                5.9 +/-    3.78       7.9 +/-    3.78  0.030 / 0.040
G30     328.8          58.2                4.0 +/-    0.70       4.6 +/-    0.70  0.040 / 0.030