PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-08:27:40
G01     126.1          10.9                0.7 +/-   19.48       2.0 +/-   19.48  0.030 / 0.030
G07     55.8           68.8                4.9 +/-    0.61       5.2 +/-    0.61  0.030 / 0.020
G08     52.8           42.7                3.2 +/-    1.19       4.5 +/-    1.19  0.110 / 0.390
G09     177.4          36.6                4.7 +/-    0.85       7.3 +/-    0.85  0.130 / 0.300
G11     120.8          35.8                6.8 +/-    1.20      10.7 +/-    1.20  0.060 / 0.070
G13     320.8          12.2                0.0 +/-    8.94       0.1 +/-    8.94  0.070 / 0.080
G17     200.0          11.8               -2.1 +/-   13.68      -5.7 +/-   13.68  0.110 / 0.290
G18     103.7          16.3                5.2 +/-    2.02      12.4 +/-    2.02  0.120 / 0.300
G28     267.7          46.6                4.9 +/-    3.96       6.4 +/-    3.96  0.140 / 0.120
G30     329.8          58.9                3.4 +/-    0.43       3.9 +/-    0.43  0.130 / 0.100