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                4.1 +/-    0.68       5.0 +/-    0.68  0.030 / 0.040
G08     115.6          46.2                8.3 +/-    0.51      11.0 +/-    0.51  0.030 / 0.050
G09     233.2          83.7                4.4 +/-    0.45       4.5 +/-    0.45  0.020 / 0.040
G16     42.9           20.8                2.7 +/-    2.91       5.8 +/-    2.91  0.040 / 0.040
G23     150.2          57.2                7.9 +/-    0.68       9.2 +/-    0.68  0.080 / 0.220
G27     67.8           35.7                4.3 +/-    0.55       6.7 +/-    0.55  0.090 / 0.200
G28     228.7          19.8                4.2 +/-    2.20       9.2 +/-    2.20  0.040 / 0.050
G30     291.3          25.9                4.7 +/-    1.72       8.9 +/-    1.72  0.040 / 0.050