PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-21:27:50
G03     242.4          69.0                8.4 +/-    0.47       9.0 +/-    0.47  0.040 / 0.050
G09     303.0          18.5                7.8 +/-    1.94      17.7 +/-    1.94  0.040 / 0.040
G14     98.7           14.6                9.2 +/-    1.57      23.1 +/-    1.57  0.170 / 0.460
G16     132.2          57.1               12.2 +/-    0.91      14.3 +/-    0.91  0.110 / 0.350
G22     196.8          56.9                9.8 +/-    0.63      11.4 +/-    0.63  0.040 / 0.060
G23     316.5          46.0                9.4 +/-    1.50      12.5 +/-    1.50  0.080 / 0.060
G26     75.8           54.5                9.2 +/-    0.59      11.1 +/-    0.59  0.030 / 0.040
G31     50.1           25.0                7.4 +/-    2.29      14.4 +/-    2.29  0.040 / 0.040