PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-11:58:10
G07     315.4          50.6                4.8 +/-    0.83       6.0 +/-    0.83  0.080 / 0.150
G08     118.5          46.0                7.8 +/-    0.52      10.4 +/-    0.52  0.100 / 0.180
G09     239.5          83.7                5.6 +/-    0.91       5.6 +/-    0.91  0.050 / 0.110
G16     43.4           15.5                4.2 +/-    2.70      10.2 +/-    2.70  0.070 / 0.190
G23     149.3          54.3                6.6 +/-    1.20       7.9 +/-    1.20  0.150 / 0.480
G27     69.7           36.6                5.0 +/-    0.60       7.6 +/-    0.60  0.150 / 0.420
G28     228.2          18.8                6.2 +/-    4.15      14.0 +/-    4.15  0.030 / 0.050
G30     291.3          26.0                7.0 +/-    1.18      13.3 +/-    1.18  0.040 / 0.060