PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-11:27:50
G01     122.5          15.3                3.7 +/-    0.89       9.3 +/-    0.89  0.030 / 0.040
G07     70.0           68.1                3.8 +/-    0.83       4.0 +/-    0.83  0.030 / 0.040
G08     46.1           33.1                2.5 +/-    1.00       4.1 +/-    1.00  0.040 / 0.030
G09     175.7          27.8                4.4 +/-    1.61       8.1 +/-    1.61  0.030 / 0.040
G11     110.2          38.3                3.9 +/-    0.83       5.9 +/-    0.83  0.110 / 0.190
G13     319.3          16.5               -0.2 +/-    1.58      -0.4 +/-    1.58  0.100 / 0.190
G17     200.2          21.8                4.2 +/-    1.75       8.9 +/-    1.75  0.110 / 0.200
G18     97.7           19.2                2.9 +/-    0.91       6.6 +/-    0.91  0.090 / 0.200
G28     285.1          55.5                2.7 +/-    1.70       3.2 +/-    1.70  0.110 / 0.300
G30     337.5          64.0                2.1 +/-    0.50       2.3 +/-    0.50  0.080 / 0.280