PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-10:58:00
G01     82.5           33.0                3.4 +/-    0.42       5.6 +/-    0.42  0.030 / 0.040
G07     131.0          39.1                5.5 +/-    0.86       8.1 +/-    0.86  0.030 / 0.040
G11     60.6           35.9                2.7 +/-    0.53       4.2 +/-    0.53  0.040 / 0.050
G13     286.5          37.7                3.2 +/-    1.24       4.8 +/-    1.24  0.040 / 0.050
G17     219.9          61.6                4.7 +/-    1.15       5.3 +/-    1.15  0.040 / 0.080
G18     56.3           21.5                1.3 +/-    1.74       2.9 +/-    1.74  0.040 / 0.080
G19     218.0          28.4                5.2 +/-    1.39       9.5 +/-    1.39  0.110 / 0.110
G28     359.7          61.3                3.0 +/-    0.46       3.4 +/-    0.46  0.090 / 0.110
G30     120.3          72.7                5.8 +/-    1.05       6.1 +/-    1.05  0.070 / 0.220