PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/14-07:57:50
G07     326.4          55.6                3.9 +/-    0.78       4.7 +/-    0.78  0.100 / 0.110
G08     104.6          49.9                8.2 +/-    0.92      10.3 +/-    0.92  0.070 / 0.120
G09     182.7          75.2                4.6 +/-    1.39       4.7 +/-    1.39  0.030 / 0.060
G11     148.0          10.5               -1.2 +/-   18.10      -3.3 +/-   18.10  0.030 / 0.050
G23     154.0          48.1                7.0 +/-    0.52       9.1 +/-    0.52  0.030 / 0.050
G27     61.4           34.8                4.0 +/-    0.69       6.4 +/-    0.69  0.040 / 0.050
G28     233.1          24.5                5.4 +/-    1.71      10.6 +/-    1.71  0.120 / 0.270
G30     297.0          30.4                4.1 +/-    1.57       7.1 +/-    1.57  0.090 / 0.220