PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-11:27:20
G02     47.3           43.0                4.7 +/-    0.48       6.5 +/-    0.48  0.100 / 0.460
G05     98.1           70.3                4.6 +/-    0.51       4.9 +/-    0.51  0.110 / 0.550
G12     188.6          49.5                8.7 +/-    1.64      11.0 +/-    1.64  0.060 / 0.070
G21     260.9          10.6               -5.2 +/-   10.35     -14.2 +/-   10.35  0.040 / 0.050
G25     251.7          60.0                6.4 +/-    0.82       7.2 +/-    0.82  0.050 / 0.050
G29     319.7          42.5                5.6 +/-    1.43       7.8 +/-    1.43  0.050 / 0.050