PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/24-07:57:50
G07     318.4          52.2                5.1 +/-    0.68       6.2 +/-    0.68  0.030 / 0.040
G08     115.6          46.2                7.1 +/-    0.51       9.5 +/-    0.51  0.030 / 0.050
G09     233.2          83.7                1.8 +/-    0.45       1.8 +/-    0.45  0.020 / 0.040
G16     42.9           20.8                1.8 +/-    2.91       3.8 +/-    2.91  0.040 / 0.040
G23     150.2          57.2                7.0 +/-    0.68       8.1 +/-    0.68  0.080 / 0.220
G27     67.8           35.7                3.9 +/-    0.55       6.1 +/-    0.55  0.090 / 0.200
G28     228.7          19.8                3.4 +/-    2.20       7.5 +/-    2.20  0.040 / 0.050
G30     291.3          25.9                3.8 +/-    1.72       7.2 +/-    1.72  0.040 / 0.050