PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-22:57:40
G03     233.2          67.0               11.2 +/-    0.89      12.0 +/-    0.89  0.050 / 0.040
G09     304.3          18.9                8.1 +/-    2.73      18.4 +/-    2.73  0.060 / 0.040
G14     101.3          13.2                9.0 +/-    2.31      23.4 +/-    2.31  0.030 / 0.040
G16     130.2          59.9               14.2 +/-    0.54      16.2 +/-    0.54  0.030 / 0.040
G22     194.4          54.1               12.1 +/-    0.47      14.5 +/-    0.47  0.370 / 0.220
G23     320.3          50.1               10.3 +/-    0.60      13.0 +/-    0.60  0.380 / 0.420
G26     68.1           52.0                9.4 +/-    0.98      11.6 +/-    0.98  0.090 / 0.150
G31     52.7           19.6                7.3 +/-    3.89      16.3 +/-    3.89  0.100 / 0.200