PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-20:42:50
G02     29.3           58.5                9.8 +/-    0.80      11.3 +/-    0.80  0.040 / 0.040
G05     142.6          60.3               10.3 +/-    0.35      11.7 +/-    0.35  0.030 / 0.040
G06     53.1           15.9                8.0 +/-    1.77      19.4 +/-    1.77  0.070 / 0.050
G12     194.1          68.0               10.6 +/-    0.60      11.4 +/-    0.60  0.050 / 0.060
G19     97.3           13.5               10.8 +/-    1.76      28.0 +/-    1.76  0.020 / 0.030
G25     299.7          52.3               10.5 +/-    1.78      12.8 +/-    1.78  0.030 / 0.040
G29     305.2          25.2               10.4 +/-    0.84      20.2 +/-    0.84  0.120 / 0.190