PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-09:57:50
G01     105.5          26.3                6.0 +/-    1.31      11.3 +/-    1.31  0.030 / 0.040
G07     109.8          56.3                7.1 +/-    0.42       8.3 +/-    0.42  0.030 / 0.040
G08     41.5           17.2                3.3 +/-    2.20       7.7 +/-    2.20  0.080 / 0.120
G11     85.0           42.5                7.7 +/-    1.45      10.8 +/-    1.45  0.080 / 0.150
G13     308.1          30.0                4.2 +/-    1.19       7.4 +/-    1.19  0.020 / 0.030
G17     205.9          41.1                5.2 +/-    0.77       7.5 +/-    0.77  0.020 / 0.020
G18     77.1           24.1                4.7 +/-    1.67       9.4 +/-    1.67  0.090 / 0.150
G28     319.1          61.0                3.8 +/-    0.82       4.3 +/-    0.82  0.080 / 0.130
G30     22.3           78.6                5.4 +/-    0.61       5.5 +/-    0.61  0.070 / 0.140