PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-19:12:30
G01     320.4          13.1                9.6 +/-    1.60      24.9 +/-    1.60  0.100 / 0.320
G08     262.7          15.8               13.9 +/-    1.22      34.0 +/-    1.22  0.110 / 0.260
G10     69.7           56.7                9.2 +/-    1.00      10.7 +/-    1.00  0.120 / 0.280
G11     308.4          19.7               12.1 +/-    2.02      26.8 +/-    2.02  0.100 / 0.220
G14     280.4          68.8               11.4 +/-    0.55      12.1 +/-    0.55  0.060 / 0.090
G18     97.6           31.4               10.4 +/-    0.66      17.7 +/-    0.66  0.060 / 0.100
G27     226.9          12.0               15.6 +/-    4.62      41.6 +/-    4.62  0.040 / 0.060
G31     178.7          34.4               17.3 +/-    1.22      27.7 +/-    1.22  0.040 / 0.050
G32     351.7          71.6               10.9 +/-    0.32      11.4 +/-    0.32  0.020 / 0.020