PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-07:12:40
G07     305.7          46.2                4.3 +/-    1.81       5.7 +/-    1.81  0.130 / 0.070
G08     127.0          40.1                7.0 +/-    0.69      10.1 +/-    0.69  0.090 / 0.080
G09     298.7          83.3                5.8 +/-    0.43       5.8 +/-    0.43  0.050 / 0.050
G16     42.0           24.0                2.0 +/-    1.48       4.0 +/-    1.48  0.050 / 0.060
G23     143.2          66.4                5.6 +/-    0.41       6.0 +/-    0.41  0.100 / 0.140
G27     82.7           37.6                5.6 +/-    0.95       8.4 +/-    0.95  0.120 / 0.250
G30     284.0          19.8                4.0 +/-    1.53       8.8 +/-    1.53  0.030 / 0.040