PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-13:12:50
G01     49.8           25.0                5.7 +/-    1.11      11.0 +/-    1.11  0.030 / 0.030
G06     178.4          24.8                7.0 +/-    1.23      13.7 +/-    1.23  0.030 / 0.030
G07     146.0          10.0                7.3 +/-    4.23      20.3 +/-    4.23  0.040 / 0.060
G11     44.1           12.8                3.9 +/-    1.92      10.3 +/-    1.92  0.040 / 0.050
G13     252.6          30.1                7.2 +/-    1.56      12.5 +/-    1.56  0.120 / 0.330
G15     285.0          15.6                4.2 +/-    1.88      10.3 +/-    1.88  0.110 / 0.340
G17     329.9          78.4                4.7 +/-    0.56       4.8 +/-    0.56  0.060 / 0.120
G19     249.0          62.3                5.8 +/-    0.77       6.5 +/-    0.77  0.050 / 0.130
G28     53.6           52.5                4.2 +/-    0.47       5.2 +/-    0.47  0.090 / 0.170
G30     149.9          42.6                7.2 +/-    1.06      10.1 +/-    1.06  0.110 / 0.180