PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-16:57:40
G08     284.1          23.6                8.2 +/-    1.17      16.5 +/-    1.17  0.050 / 0.130
G10     23.9           62.7                5.3 +/-    0.46       5.9 +/-    0.46  0.060 / 0.140
G14     236.5          53.1                0.1 +/-    1.27       0.1 +/-    1.27  0.060 / 0.060
G18     317.2          18.8                5.9 +/-    0.66      13.4 +/-    0.66  0.060 / 0.070
G20     74.6           48.3                6.3 +/-    0.41       8.2 +/-    0.41  0.030 / 0.040
G21     148.9          30.1                9.2 +/-    1.65      16.1 +/-    1.65  0.030 / 0.030
G24     47.7           19.0                4.5 +/-    1.10      10.2 +/-    1.10  0.090 / 0.130
G27     250.4          28.3                7.4 +/-    1.12      13.5 +/-    1.12  0.090 / 0.150
G32     260.6          71.7                6.9 +/-    0.61       7.3 +/-    0.61  0.100 / 0.150