PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-11:12:40
G07     332.4          57.8                3.0 +/-    0.86       3.5 +/-    0.86  0.080 / 0.120
G08     97.7           51.5                5.5 +/-    0.64       6.8 +/-    0.64  0.070 / 0.110
G09     185.5          72.3                7.1 +/-    1.45       7.4 +/-    1.45  0.050 / 0.070
G11     145.2          13.3                3.0 +/-    2.87       7.7 +/-    2.87  0.060 / 0.090
G23     155.4          41.7                5.9 +/-    0.97       8.3 +/-    0.97  0.110 / 0.450
G27     55.6           32.0                2.1 +/-    0.80       3.5 +/-    0.80  0.130 / 0.520
G28     236.9          29.1                7.4 +/-    3.19      13.2 +/-    3.19  0.090 / 0.170
G30     301.0          33.8                4.2 +/-    1.41       6.8 +/-    1.41  0.090 / 0.150