PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/09-07:42:50
G07     306.3          46.4                4.3 +/-    1.94       5.7 +/-    1.94  0.110 / 0.340
G08     126.5          40.5                7.2 +/-    0.90      10.5 +/-    0.90  0.140 / 0.290
G09     296.3          83.3                5.1 +/-    0.30       5.1 +/-    0.30  0.050 / 0.050
G16     42.0           23.4                2.3 +/-    1.64       4.6 +/-    1.64  0.050 / 0.060
G23     143.7          65.5                6.1 +/-    0.48       6.7 +/-    0.48  0.030 / 0.040
G27     81.7           37.6                5.6 +/-    0.82       8.5 +/-    0.82  0.030 / 0.040
G28     223.5          11.0               -5.1 +/-    6.84     -14.0 +/-    6.84  0.090 / 0.070
G30     284.5          20.2                4.3 +/-    1.03       9.4 +/-    1.03  0.050 / 0.090