PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-04:12:50
G08     275.0          20.8                9.9 +/-    1.79      21.4 +/-    1.79  0.090 / 0.150
G10     46.1           61.0                6.5 +/-    1.01       7.3 +/-    1.01  0.070 / 0.140
G14     249.9          58.7                8.4 +/-    0.76       9.7 +/-    0.76  0.110 / 0.120
G18     315.6          24.9                8.6 +/-    1.63      16.9 +/-    1.63  0.130 / 0.170
G20     74.1           55.4                7.5 +/-    0.70       8.9 +/-    0.70  0.390 / 0.360
G21     153.4          23.7                7.7 +/-    1.82      15.5 +/-    1.82  0.290 / 0.380
G24     42.7           14.5                5.1 +/-    4.14      12.9 +/-    4.14  0.030 / 0.050
G27     237.9          21.1                8.9 +/-    1.48      19.1 +/-    1.48  0.040 / 0.050
G31     178.3          24.3                5.7 +/-    2.35      11.4 +/-    2.35  0.200 / 0.290
G32     315.5          76.7                6.9 +/-    0.53       7.1 +/-    0.53  0.170 / 0.200