PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-16:27:40
G08     275.3          20.1                6.9 +/-    2.24      15.1 +/-    2.24  0.510 / 0.230
G10     47.4           61.1               25.7 +/-    0.97      28.9 +/-    0.97  0.360 / 0.440
G11     316.4          11.4               -0.9 +/-   15.25      -2.4 +/-   15.25  0.090 / 0.180
G14     253.3          61.1                9.7 +/-    0.40      10.9 +/-    0.40  0.090 / 0.160
G18     86.8           38.4                9.6 +/-    0.57      14.4 +/-    0.57  0.180 / 0.240
G21     152.3          18.4               12.2 +/-    2.75      28.0 +/-    2.75  0.180 / 0.300
G24     43.1           15.5                7.5 +/-    2.15      18.4 +/-    2.15  0.090 / 0.130
G27     235.9          19.9               10.0 +/-    4.46      22.0 +/-    4.46  0.120 / 0.100
G31     179.9          23.5               12.1 +/-    1.52      24.6 +/-    1.52  0.040 / 0.050
G32     312.5          76.1                9.8 +/-    0.35      10.0 +/-    0.35  0.050 / 0.040