PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-18:13:00
G08     286.3          22.6                4.7 +/-    1.14       9.7 +/-    1.14  0.080 / 0.100
G10     21.5           63.1                8.3 +/-    1.46       9.2 +/-    1.46  0.090 / 0.090
G14     237.2          52.6                9.2 +/-    1.70      11.3 +/-    1.70  0.140 / 0.110
G18     73.7           45.9                7.4 +/-    1.14       9.9 +/-    1.14  0.110 / 0.170
G21     148.3          28.1               10.6 +/-    1.36      19.3 +/-    1.36  0.130 / 0.210
G24     51.0           23.0                7.4 +/-    3.55      15.2 +/-    3.55  0.170 / 0.270
G27     245.9          27.5                7.6 +/-    2.59      14.1 +/-    2.59  0.020 / 0.020
G31     183.3          11.3                2.0 +/-   19.02       5.4 +/-   19.02  0.030 / 0.030
G32     262.7          72.0                6.9 +/-    0.86       7.2 +/-    0.86  0.090 / 0.120