PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-18:28:00
G01     121.5          16.1               17.3 +/-    1.74      41.8 +/-    1.74  0.050 / 0.070
G07     72.1           68.1               14.6 +/-    0.94      15.6 +/-    0.94  0.040 / 0.080
G08     47.3           36.5               12.1 +/-    0.92      18.6 +/-    0.92  0.030 / 0.050
G09     177.6          29.1               15.7 +/-    2.50      28.0 +/-    2.50  0.030 / 0.040
G11     111.9          38.7               16.9 +/-    0.62      25.1 +/-    0.62  0.120 / 0.210
G13     319.0          17.0               11.2 +/-    2.13      26.6 +/-    2.13  0.100 / 0.240
G17     202.2          18.5               17.8 +/-    0.88      40.6 +/-    0.88  0.050 / 0.090
G18     97.6           19.7               15.5 +/-    0.85      34.3 +/-    0.85  0.040 / 0.110
G28     288.2          56.4               15.1 +/-    0.85      17.7 +/-    0.85  0.040 / 0.060
G30     344.4          67.1               13.5 +/-    0.66      14.5 +/-    0.66  0.040 / 0.070