PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-19:12:30
G03     221.7          65.0               11.0 +/-    1.12      12.0 +/-    1.12  0.060 / 0.050
G09     305.1          19.8                8.7 +/-    0.71      19.2 +/-    0.71  0.050 / 0.050
G14     102.3          13.4               10.8 +/-    1.37      27.9 +/-    1.37  0.160 / 0.150
G16     120.8          61.6               14.1 +/-    0.32      15.8 +/-    0.32  0.130 / 0.250
G22     191.0          50.7               12.5 +/-    0.53      15.6 +/-    0.53  0.050 / 0.040
G23     323.4          53.3               10.9 +/-    0.42      13.3 +/-    0.42  0.040 / 0.030
G26     63.4           49.4               10.9 +/-    0.98      13.9 +/-    0.98  0.120 / 0.330
G31     54.3           16.3                8.2 +/-    1.84      19.6 +/-    1.84  0.130 / 0.350