PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-22:27:50
G01     241.1          29.5               10.2 +/-    1.19      18.1 +/-    1.19  0.030 / 0.030
G03     312.3          52.8                7.3 +/-    0.95       8.9 +/-    0.95  0.030 / 0.030
G14     70.2           34.8                7.2 +/-    0.71      11.5 +/-    0.71  0.100 / 0.210
G16     161.7          25.2               12.1 +/-    1.86      23.6 +/-    1.86  0.090 / 0.160
G22     285.8          72.9                8.8 +/-    1.15       9.2 +/-    1.15  0.040 / 0.040
G23     293.5          24.6                9.5 +/-    2.05      18.7 +/-    2.05  0.060 / 0.040
G26     129.0          45.1               11.0 +/-    0.67      14.8 +/-    0.67  0.170 / 0.160
G31     39.8           50.9                7.7 +/-    0.66       9.6 +/-    0.66  0.120 / 0.170
G32     85.0           17.8                7.6 +/-    1.70      17.7 +/-    1.70  0.140 / 0.130