PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-20:12:30
G02     285.5          80.7                9.6 +/-    0.58       9.7 +/-    0.58  0.030 / 0.040
G05     167.6          25.5               13.3 +/-    1.64      25.6 +/-    1.64  0.020 / 0.040
G06     40.4           46.7                7.9 +/-    0.75      10.4 +/-    0.75  0.100 / 0.180
G12     319.7          65.5                9.5 +/-    0.64      10.4 +/-    0.64  0.110 / 0.130
G17     79.1           16.8                9.1 +/-    2.29      21.7 +/-    2.29  0.060 / 0.050
G19     65.4           34.6                8.8 +/-    1.24      14.0 +/-    1.24  0.040 / 0.040
G24     234.2          28.2               12.5 +/-    1.49      22.6 +/-    1.49  0.180 / 0.200
G25     317.7          21.3                9.6 +/-    2.35      20.4 +/-    2.35  0.220 / 0.220