PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-21:12:50
G01     270.2          40.8                6.9 +/-    1.53       9.9 +/-    1.53  0.040 / 0.060
G03     315.8          29.9                7.8 +/-    2.01      13.8 +/-    2.01  0.040 / 0.060
G10     130.0          17.1               11.4 +/-    2.21      27.0 +/-    2.21  0.060 / 0.080
G11     250.7          20.5               10.5 +/-    2.54      22.8 +/-    2.54  0.040 / 0.090
G14     44.1           49.7                6.2 +/-    1.30       7.9 +/-    1.30  0.090 / 0.250
G22     314.0          51.6                7.2 +/-    1.30       8.9 +/-    1.30  0.110 / 0.260
G25     51.7           16.6                7.0 +/-    1.04      16.7 +/-    1.04  0.030 / 0.030
G26     149.3          24.6               12.4 +/-    2.00      24.4 +/-    2.00  0.040 / 0.030
G31     55.9           75.4                6.6 +/-    0.98       6.8 +/-    0.98  0.060 / 0.080
G32     64.2           32.9                7.1 +/-    0.73      11.8 +/-    0.73  0.070 / 0.080