PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-21:43:00
G01     254.9          36.9               12.1 +/-    1.66      18.6 +/-    1.66  0.050 / 0.030
G03     316.3          40.7                9.8 +/-    1.16      14.1 +/-    1.16  0.040 / 0.040
G11     240.5          14.5               12.0 +/-    2.19      30.3 +/-    2.19  0.140 / 0.220
G14     57.1           42.6                8.0 +/-    1.81      11.2 +/-    1.81  0.270 / 0.260
G22     308.5          62.6                9.2 +/-    0.67      10.3 +/-    0.67  0.030 / 0.030
G23     284.0          16.9               12.0 +/-    3.12      28.5 +/-    3.12  0.030 / 0.040
G25     42.0           11.8                7.5 +/-    1.30      20.0 +/-    1.30  0.060 / 0.080
G26     141.1          34.6               13.2 +/-    1.51      21.2 +/-    1.51  0.060 / 0.060
G31     41.5           63.8                8.8 +/-    0.60       9.7 +/-    0.60  0.070 / 0.100
G32     74.3           25.6                8.8 +/-    1.09      17.0 +/-    1.09  0.060 / 0.140