PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/13-07:13:00
G07     38.5           69.4                5.9 +/-    0.51       6.3 +/-    0.51  0.050 / 0.040
G08     53.8           41.8                5.0 +/-    0.62       7.0 +/-    0.62  0.030 / 0.050
G09     174.4          37.2                8.3 +/-    0.80      12.7 +/-    0.80  0.030 / 0.050
G11     122.4          32.3                7.4 +/-    0.92      12.4 +/-    0.92  0.030 / 0.040
G17     198.6          11.2               -0.2 +/-   18.32      -0.6 +/-   18.32  0.080 / 0.130
G18     107.1          13.8                6.2 +/-    2.53      15.9 +/-    2.53  0.090 / 0.160
G23     161.2          14.3                6.9 +/-    1.37      17.4 +/-    1.37  0.100 / 0.330
G27     38.7           13.1                1.8 +/-    0.94       4.7 +/-    0.94  0.110 / 0.290
G28     266.6          48.7                6.9 +/-    0.88       8.8 +/-    0.88  0.200 / 0.480
G30     324.9          54.5                5.6 +/-    0.82       6.7 +/-    0.82  0.210 / 0.350