PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-08:43:00
G07     48.6           69.5                6.4 +/-    0.39       6.8 +/-    0.39  0.030 / 0.030
G08     50.9           39.4                5.0 +/-    1.13       7.3 +/-    1.13  0.030 / 0.020
G09     174.4          33.5                7.7 +/-    1.18      12.5 +/-    1.18  0.090 / 0.310
G11     119.0          34.4                7.8 +/-    0.74      12.5 +/-    0.74  0.130 / 0.230
G17     199.0          14.4                5.6 +/-    3.57      14.2 +/-    3.57  0.040 / 0.040
G18     104.2          15.6                5.5 +/-    1.35      13.5 +/-    1.35  0.040 / 0.030
G23     161.1          10.5                4.0 +/-    1.79      11.1 +/-    1.79  0.170 / 0.350
G27     37.7           9.8                 2.5 +/-    2.85       7.1 +/-    2.85  0.200 / 0.510
G28     272.0          51.0                5.3 +/-    3.10       6.6 +/-    3.10  0.110 / 0.210
G30     328.6          57.5                5.1 +/-    0.53       5.9 +/-    0.53  0.110 / 0.250