PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-12:42:50
G07     7.3            67.0                5.0 +/-    0.60       5.4 +/-    0.60  0.060 / 0.050
G08     67.1           49.3                5.3 +/-    0.63       6.7 +/-    0.63  0.060 / 0.050
G09     178.5          51.7                7.8 +/-    0.66       9.6 +/-    0.66  0.020 / 0.030
G11     132.3          25.5                7.5 +/-    3.26      14.5 +/-    3.26  0.020 / 0.020
G23     159.5          21.9                4.7 +/-    1.94       9.8 +/-    1.94  0.120 / 0.190
G27     42.1           19.8                5.6 +/-    1.69      12.5 +/-    1.69  0.160 / 0.160
G28     254.8          43.1                7.2 +/-    2.69      10.0 +/-    2.69  0.070 / 0.140
G30     316.5          47.3                5.8 +/-    0.84       7.6 +/-    0.84  0.090 / 0.150