PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-15:27:40
G03     186.3          11.3               10.9 +/-    1.28      29.7 +/-    1.28  0.050 / 0.090
G07     300.5          42.9               10.0 +/-    1.21      13.8 +/-    1.21  0.050 / 0.090
G08     136.0          35.8               13.3 +/-    0.74      20.8 +/-    0.74  0.080 / 0.170
G09     314.3          73.4                9.7 +/-    0.79      10.1 +/-    0.79  0.090 / 0.220
G16     41.7           27.5                6.1 +/-    1.88      11.3 +/-    1.88  0.090 / 0.170
G23     137.9          64.5               12.9 +/-    0.63      14.1 +/-    0.63  0.110 / 0.200
G27     86.0           36.8                9.3 +/-    0.91      14.3 +/-    0.91  0.030 / 0.030
G30     282.0          19.4                8.4 +/-    1.38      18.8 +/-    1.38  0.040 / 0.030