PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-17:58:10
G02     31.0           57.0                7.7 +/-    0.40       9.0 +/-    0.40  0.030 / 0.040
G05     138.8          62.9                9.8 +/-    1.07      10.8 +/-    1.07  0.030 / 0.040
G06     55.1           12.8                5.8 +/-    0.98      15.2 +/-    0.98  0.030 / 0.040
G12     187.8          62.7                7.9 +/-    1.12       8.7 +/-    1.12  0.030 / 0.040
G19     99.7           12.1                8.1 +/-    1.39      21.5 +/-    1.39  0.050 / 0.060
G25     293.9          55.2                7.0 +/-    1.14       8.3 +/-    1.14  0.050 / 0.060
G29     307.4          27.5                5.6 +/-    1.21      10.4 +/-    1.21  0.080 / 0.220