PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-12:42:50
G07     319.4          52.4                5.0 +/-    0.47       6.1 +/-    0.47  0.050 / 0.050
G08     114.6          47.9                7.5 +/-    0.56       9.8 +/-    0.56  0.060 / 0.060
G09     215.5          82.0                5.1 +/-    0.67       5.2 +/-    0.67  0.090 / 0.210
G16     44.2           12.9                4.8 +/-    2.81      12.4 +/-    2.81  0.110 / 0.230
G23     150.9          50.2                7.8 +/-    0.58       9.9 +/-    0.58  0.040 / 0.040
G27     65.6           35.7                6.1 +/-    1.45       9.5 +/-    1.45  0.050 / 0.040
G28     230.3          21.6                6.0 +/-    3.48      12.6 +/-    3.48  0.030 / 0.050
G30     294.0          28.3                4.1 +/-    1.50       7.4 +/-    1.50  0.050 / 0.060