PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/09-07:12:30
G07     328.0          56.0                4.0 +/-    1.09       4.7 +/-    1.09  0.020 / 0.030
G08     104.8          49.8                7.9 +/-    0.85      10.0 +/-    0.85  0.030 / 0.030
G09     196.5          78.1                5.2 +/-    0.66       5.3 +/-    0.66  0.040 / 0.040
G16     44.7           15.3                2.7 +/-    1.75       6.6 +/-    1.75  0.040 / 0.050
G23     154.0          49.1                7.3 +/-    0.66       9.3 +/-    0.66  0.080 / 0.200
G27     59.3           33.2                3.8 +/-    0.56       6.3 +/-    0.56  0.070 / 0.210
G28     233.7          26.0                5.6 +/-    1.37      10.6 +/-    1.37  0.120 / 0.510
G30     297.4          31.0                3.0 +/-    0.89       5.2 +/-    0.89  0.130 / 0.430