PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-15:58:10
G07     323.6          54.2               14.2 +/-    1.14      17.1 +/-    1.14  0.030 / 0.070
G08     112.8          49.8               16.4 +/-    0.69      20.8 +/-    0.69  0.040 / 0.060
G09     207.2          79.7               14.2 +/-    0.47      14.4 +/-    0.47  0.040 / 0.050
G16     45.2           10.5               10.9 +/-    2.85      30.0 +/-    2.85  0.040 / 0.040
G23     151.7          43.8               16.3 +/-    1.11      22.3 +/-    1.11  0.100 / 0.240
G27     61.1           34.3               12.0 +/-    1.18      19.2 +/-    1.18  0.110 / 0.250
G28     232.8          24.8               15.8 +/-    1.82      31.0 +/-    1.82  0.090 / 0.130
G30     297.5          31.7               13.6 +/-    2.14      23.1 +/-    2.14  0.080 / 0.130