PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-17:28:00
G02     50.9           41.1                4.6 +/-    0.51       6.5 +/-    0.51  0.240 / 0.400
G05     78.3           69.2                5.8 +/-    0.43       6.2 +/-    0.43  0.170 / 0.380
G12     183.8          38.6                8.0 +/-    0.75      11.8 +/-    0.75  0.040 / 0.070
G13     133.6          10.1               -2.1 +/-   22.84      -5.9 +/-   22.84  0.040 / 0.070
G21     265.4          12.5                6.8 +/-    3.19      17.9 +/-    3.19  0.030 / 0.030
G25     245.4          56.4                6.9 +/-    1.16       8.0 +/-    1.16  0.030 / 0.020
G29     323.0          46.7                6.0 +/-    0.91       7.9 +/-    0.91  0.040 / 0.040