PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-11:43:00
G01     58.3           29.9                3.3 +/-    0.46       5.7 +/-    0.46  0.030 / 0.040
G07     142.9          20.1                4.1 +/-    1.07       9.0 +/-    1.07  0.040 / 0.050
G11     46.9           21.3                1.4 +/-    2.46       3.0 +/-    2.46  0.030 / 0.070
G13     260.0          34.8                3.7 +/-    1.47       5.9 +/-    1.47  0.030 / 0.060
G15     297.3          14.2                1.9 +/-    2.59       4.8 +/-    2.59  0.090 / 0.140
G17     271.8          78.6                3.5 +/-    0.52       3.5 +/-    0.52  0.070 / 0.130
G18     40.5           10.8                2.0 +/-    1.38       5.6 +/-    1.38  0.050 / 0.090
G19     233.3          47.3                3.8 +/-    1.64       5.0 +/-    1.64  0.050 / 0.090
G28     37.2           56.6                2.4 +/-    0.56       2.8 +/-    0.56  0.120 / 0.370
G30     145.3          52.2                5.4 +/-    0.84       6.6 +/-    0.84  0.140 / 0.420