PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-13:28:10
G01     48.5           24.0                5.5 +/-    0.58      11.0 +/-    0.58  0.040 / 0.060
G06     177.9          26.6                5.9 +/-    1.02      11.0 +/-    1.02  0.050 / 0.070
G11     43.8           11.4                5.2 +/-    1.90      14.2 +/-    1.90  0.100 / 0.220
G13     250.9          29.2                5.0 +/-    1.42       8.8 +/-    1.42  0.080 / 0.250
G15     283.5          15.3                2.6 +/-    1.68       6.5 +/-    1.68  0.060 / 0.110
G17     337.5          77.4                7.0 +/-    0.74       7.2 +/-    0.74  0.050 / 0.130
G19     252.2          63.6                5.0 +/-    0.59       5.5 +/-    0.59  0.030 / 0.030
G28     56.0           51.8                6.5 +/-    0.37       8.0 +/-    0.37  0.030 / 0.030
G30     150.7          40.9                6.5 +/-    0.85       9.3 +/-    0.85  0.120 / 0.150