PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-16:13:00
G07     306.6          46.1               11.5 +/-    1.60      15.3 +/-    1.60  0.060 / 0.070
G08     131.3          40.2               14.4 +/-    1.27      20.9 +/-    1.27  0.070 / 0.070
G09     302.9          78.6               12.4 +/-    0.76      12.7 +/-    0.76  0.100 / 0.120
G16     42.1           22.6                9.1 +/-    2.38      18.7 +/-    2.38  0.110 / 0.140
G23     143.1          58.1               12.9 +/-    0.36      14.9 +/-    0.36  0.040 / 0.090
G27     78.5           37.1               11.1 +/-    1.14      17.0 +/-    1.14  0.050 / 0.080
G28     224.2          13.0               10.9 +/-    1.70      28.3 +/-    1.70  0.150 / 0.300
G30     286.4          23.0               10.0 +/-    1.65      20.5 +/-    1.65  0.110 / 0.330