PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-19:42:50
G01     305.1          34.4               11.9 +/-    0.92      19.0 +/-    0.92  0.090 / 0.140
G10     108.2          39.0               14.0 +/-    0.67      20.6 +/-    0.67  0.070 / 0.150
G11     280.5          28.0               12.8 +/-    0.63      23.3 +/-    0.63  0.100 / 0.110
G14     1.5            65.8               10.3 +/-    0.65      11.2 +/-    0.65  0.150 / 0.120
G18     119.1          11.1               14.1 +/-    1.35      38.6 +/-    1.35  0.040 / 0.030
G22     310.3          27.2               11.7 +/-    2.52      21.7 +/-    2.52  0.030 / 0.030
G25     79.9           17.2               15.0 +/-    2.85      35.3 +/-    2.85  0.060 / 0.030
G31     167.4          66.5               13.8 +/-    0.39      14.9 +/-    0.39  0.030 / 0.030
G32     37.8           51.4               10.7 +/-    1.30      13.3 +/-    1.30  0.040 / 0.040