PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-12:27:40
G01     119.4          17.5                4.2 +/-    1.22       9.8 +/-    1.22  0.110 / 0.290
G07     83.2           64.3                4.2 +/-    0.64       4.6 +/-    0.64  0.100 / 0.300
G08     44.8           30.2                2.8 +/-    0.46       4.8 +/-    0.46  0.030 / 0.040
G09     175.1          24.4                4.3 +/-    3.08       8.5 +/-    3.08  0.030 / 0.040
G11     104.8          38.2                4.9 +/-    1.05       7.3 +/-    1.05  0.030 / 0.070
G13     319.0          17.0                1.7 +/-    1.79       4.0 +/-    1.79  0.030 / 0.040
G17     200.8          26.3                4.6 +/-    2.00       8.8 +/-    2.00  0.050 / 0.160
G28     292.0          57.1                3.5 +/-    0.81       4.1 +/-    0.81  0.050 / 0.090
G30     342.0          66.3                3.8 +/-    0.55       4.1 +/-    0.55  0.120 / 0.210