PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-23:28:00
G01     222.7          13.4                9.1 +/-    2.98      23.4 +/-    2.98  0.030 / 0.030
G03     272.4          69.5                7.4 +/-    0.56       7.8 +/-    0.56  0.030 / 0.030
G14     91.4           20.7                9.7 +/-    2.62      21.1 +/-    2.62  0.050 / 0.050
G16     147.5          48.5               12.0 +/-    0.72      15.5 +/-    0.72  0.040 / 0.050
G22     207.7          66.6                7.2 +/-    0.37       7.8 +/-    0.37  0.050 / 0.080
G23     310.8          40.4                7.6 +/-    0.93      11.0 +/-    0.93  0.040 / 0.140
G26     91.0           55.5                8.8 +/-    1.36      10.4 +/-    1.36  0.150 / 0.560
G31     46.6           29.8                6.2 +/-    1.13      10.9 +/-    1.13  0.170 / 0.560