PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-11:42:40
G01     58.3           29.9                3.7 +/-    2.43       6.4 +/-    2.43  0.170 / 0.190
G07     142.9          20.1                2.8 +/-    2.57       6.1 +/-    2.57  0.100 / 0.210
G11     46.9           21.3                2.9 +/-    2.65       6.2 +/-    2.65  0.110 / 0.080
G13     260.0          34.8                5.5 +/-    1.90       8.8 +/-    1.90  0.110 / 0.120
G15     297.3          14.2                1.1 +/-    1.06       2.7 +/-    1.06  0.030 / 0.040
G17     271.8          78.6                4.2 +/-    0.51       4.3 +/-    0.51  0.040 / 0.050
G18     40.5           10.8                2.3 +/-    1.38       6.2 +/-    1.38  0.040 / 0.040
G19     233.3          47.3                4.5 +/-    1.74       5.9 +/-    1.74  0.040 / 0.040
G28     37.2           56.6                2.4 +/-    1.44       2.8 +/-    1.44  0.100 / 0.360
G30     145.3          52.2                4.7 +/-    0.58       5.8 +/-    0.58  0.090 / 0.440