PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-05:28:00
G07     18.2           68.0                6.2 +/-    0.49       6.6 +/-    0.49  0.130 / 0.120
G08     62.5           47.4                5.9 +/-    1.04       7.7 +/-    1.04  0.130 / 0.120
G09     179.7          49.8               10.3 +/-    0.70      13.0 +/-    0.70  0.040 / 0.030
G11     129.8          26.8                5.9 +/-    1.71      11.1 +/-    1.71  0.030 / 0.020
G23     160.5          20.8                6.1 +/-    1.23      13.2 +/-    1.23  0.050 / 0.040
G27     40.2           16.3                3.3 +/-    1.69       8.0 +/-    1.69  0.040 / 0.040
G28     259.5          46.0                6.7 +/-    3.83       8.9 +/-    3.83  0.040 / 0.050
G30     320.8          50.9                5.9 +/-    0.81       7.4 +/-    0.81  0.040 / 0.040