PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-21:12:50
G01     68.2           32.6               11.2 +/-    0.62      18.5 +/-    0.62  0.120 / 0.220
G07     138.7          29.5               13.8 +/-    0.74      24.5 +/-    0.74  0.110 / 0.190
G11     53.1           30.4               10.8 +/-    1.16      18.7 +/-    1.16  0.100 / 0.300
G13     272.0          37.1               12.0 +/-    2.01      18.3 +/-    2.01  0.080 / 0.290
G15     300.6          15.7                7.8 +/-    2.08      19.0 +/-    2.08  0.040 / 0.070
G17     235.4          66.3               13.4 +/-    0.73      14.5 +/-    0.73  0.050 / 0.080
G18     47.7           17.4                9.8 +/-    2.53      23.0 +/-    2.53  0.050 / 0.080
G19     225.9          43.1               13.5 +/-    1.66      18.7 +/-    1.66  0.060 / 0.090
G28     24.2           58.6               10.4 +/-    2.13      11.9 +/-    2.13  0.030 / 0.030
G30     137.6          57.9               13.0 +/-    0.59      15.1 +/-    0.59  0.030 / 0.040