PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-17:27:50
G08     284.8          22.3                8.4 +/-    1.64      17.5 +/-    1.64  0.120 / 0.100
G10     25.7           63.0                6.5 +/-    0.87       7.2 +/-    0.87  0.120 / 0.140
G14     239.3          53.9               10.2 +/-    2.72      12.3 +/-    2.72  0.150 / 0.220
G18     76.0           44.6                8.4 +/-    2.04      11.3 +/-    2.04  0.120 / 0.110
G21     149.1          27.0               11.8 +/-    1.45      22.0 +/-    1.45  0.220 / 0.240
G24     49.5           21.9                8.1 +/-    3.03      17.0 +/-    3.03  0.160 / 0.210
G27     244.2          26.3                9.2 +/-    1.35      17.5 +/-    1.35  0.020 / 0.020
G31     182.5          13.4               14.4 +/-    2.75      37.1 +/-    2.75  0.020 / 0.020
G32     269.3          73.4                9.6 +/-    0.58      10.0 +/-    0.58  0.090 / 0.070