PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/15-04:27:50
G07     318.6          52.1                4.1 +/-    0.51       5.0 +/-    0.51  0.180 / 0.400
G08     115.3          46.9                8.2 +/-    0.51      10.8 +/-    0.51  0.250 / 0.290
G09     240.3          83.1                4.8 +/-    0.35       4.9 +/-    0.35  0.070 / 0.050
G16     42.9           21.8                3.1 +/-    2.86       6.5 +/-    2.86  0.030 / 0.040
G23     150.9          55.5                7.6 +/-    0.69       9.0 +/-    0.69  0.140 / 0.260
G27     66.5           35.5                6.5 +/-    1.09      10.3 +/-    1.09  0.250 / 0.290
G28     229.4          20.9                5.3 +/-    3.29      11.3 +/-    3.29  0.090 / 0.050
G30     293.0          28.0                1.2 +/-    1.50       2.3 +/-    1.50  0.030 / 0.040