PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-16:57:40
G10     301.0          52.6                8.4 +/-    1.38      10.3 +/-    1.38  0.070 / 0.060
G14     211.1          14.7               13.1 +/-    3.58      32.7 +/-    3.58  0.090 / 0.080
G15     45.6           24.3                7.5 +/-    2.24      14.8 +/-    2.24  0.070 / 0.100
G18     9.4            64.9                8.5 +/-    0.60       9.3 +/-    0.60  0.060 / 0.110
G20     72.6           18.4                7.2 +/-    1.26      16.5 +/-    1.26  0.210 / 0.460
G21     111.3          66.6               12.7 +/-    0.82      13.7 +/-    0.82  0.150 / 0.350
G24     95.6           27.6                7.5 +/-    1.67      13.8 +/-    1.67  0.190 / 0.230
G27     295.7          36.1               10.0 +/-    2.43      15.6 +/-    2.43  0.200 / 0.160
G32     212.3          34.0               14.0 +/-    2.61      22.6 +/-    2.61  0.050 / 0.040