PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/12-13:42:50
G02     31.2           57.5                5.1 +/-    0.86       5.9 +/-    0.86  0.030 / 0.030
G05     147.9          58.3                7.8 +/-    0.38       9.0 +/-    0.38  0.030 / 0.030
G06     51.0           21.7                3.9 +/-    1.89       8.2 +/-    1.89  0.020 / 0.030
G12     209.4          72.2                5.5 +/-    0.71       5.8 +/-    0.71  0.030 / 0.020
G19     98.0           10.7                8.6 +/-    1.58      23.5 +/-    1.58  0.230 / 0.210
G20     198.7          21.7                4.2 +/-    2.63       9.0 +/-    2.63  0.170 / 0.250
G25     300.8          52.1                5.8 +/-    2.08       7.2 +/-    2.08  0.200 / 0.320
G29     307.7          30.4                4.6 +/-    0.97       8.1 +/-    0.97  0.220 / 0.260