PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-17:57:50
G07     20.4           68.7                9.6 +/-    0.87      10.2 +/-    0.87  0.050 / 0.050
G08     63.1           49.2               11.9 +/-    0.93      15.1 +/-    0.93  0.060 / 0.050
G09     179.8          47.5               13.4 +/-    0.79      17.5 +/-    0.79  0.030 / 0.030
G11     129.5          28.6               13.8 +/-    2.02      25.0 +/-    2.02  0.030 / 0.030
G18     113.2          11.3               13.8 +/-    2.83      37.3 +/-    2.83  0.040 / 0.050
G23     158.5          12.9               14.1 +/-    1.80      37.0 +/-    1.80  0.040 / 0.040
G27     39.5           15.1                7.7 +/-    2.45      19.1 +/-    2.45  0.120 / 0.220
G28     262.1          47.2               11.2 +/-    4.07      14.6 +/-    4.07  0.210 / 0.210
G30     323.6          53.3                8.6 +/-    0.38      10.5 +/-    0.38  0.080 / 0.180