PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-16:57:50
G03     185.6          10.7               10.2 +/-    2.81      28.0 +/-    2.81  0.100 / 0.150
G07     300.5          42.9               10.8 +/-    2.57      15.1 +/-    2.57  0.140 / 0.140
G08     137.4          35.4               12.4 +/-    1.36      19.6 +/-    1.36  0.050 / 0.110
G09     314.4          72.9               11.6 +/-    0.66      12.1 +/-    0.66  0.050 / 0.080
G16     41.7           27.9                8.2 +/-    1.84      15.0 +/-    1.84  0.040 / 0.040
G23     137.8          64.2               12.3 +/-    0.30      13.5 +/-    0.30  0.040 / 0.040
G27     85.8           36.7               10.0 +/-    0.96      15.5 +/-    0.96  0.110 / 0.110
G30     282.2          20.0               11.6 +/-    2.02      25.4 +/-    2.02  0.140 / 0.110