PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-06:58:10
G02     202.2          30.1                3.7 +/-    1.24       6.6 +/-    1.24  0.060 / 0.090
G06     167.4          63.4                6.9 +/-    0.62       7.6 +/-    0.62  0.050 / 0.090
G12     304.8          11.7               -0.4 +/-   10.22      -1.1 +/-   10.22  0.120 / 0.340
G17     34.7           50.0                2.3 +/-    0.81       2.9 +/-    0.81  0.130 / 0.260
G19     345.3          68.1                3.3 +/-    0.53       3.5 +/-    0.53  0.040 / 0.040
G24     298.4          39.3                3.5 +/-    1.10       5.1 +/-    1.10  0.040 / 0.030
G28     97.1           35.7                6.0 +/-    0.66       9.4 +/-    0.66  0.050 / 0.040