PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-17:57:50
G01     313.2          28.1                8.9 +/-    1.15      16.3 +/-    1.15  0.040 / 0.040
G10     97.3           44.7               11.1 +/-    1.04      15.0 +/-    1.04  0.040 / 0.040
G11     289.1          27.8                8.3 +/-    1.03      15.3 +/-    1.03  0.070 / 0.120
G14     338.9          70.1                9.6 +/-    0.75      10.2 +/-    0.75  0.090 / 0.110
G18     285.3          50.2               15.1 +/-    4.39      18.9 +/-    4.39  0.040 / 0.050
G20     115.3          19.8                9.5 +/-    1.20      21.1 +/-    1.20  0.040 / 0.030
G22     306.8          19.6                8.0 +/-    1.16      17.9 +/-    1.16  0.090 / 0.160
G25     84.9           13.1               10.4 +/-    2.09      27.1 +/-    2.09  0.080 / 0.170
G31     177.5          52.0               12.1 +/-    0.98      14.9 +/-    0.98  0.090 / 0.140
G32     24.8           59.4                9.4 +/-    1.18      10.8 +/-    1.18  0.070 / 0.150