PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-02:27:40
G01     238.1          27.4                4.2 +/-    1.61       7.7 +/-    1.61  0.030 / 0.040
G03     310.8          54.0                3.5 +/-    1.09       4.2 +/-    1.09  0.030 / 0.030
G14     73.8           32.1                3.0 +/-    0.61       5.0 +/-    0.61  0.060 / 0.160
G16     160.9          27.7                6.0 +/-    1.65      10.9 +/-    1.65  0.080 / 0.180
G22     276.5          74.3                4.4 +/-    0.47       4.6 +/-    0.47  0.100 / 0.180
G23     295.4          25.8                4.0 +/-    0.87       7.6 +/-    0.87  0.090 / 0.150
G26     129.5          46.7                6.6 +/-    1.27       8.7 +/-    1.27  0.030 / 0.040
G31     39.5           50.1                1.6 +/-    0.89       2.1 +/-    0.89  0.030 / 0.050
G32     86.7           17.6                3.7 +/-    1.04       8.7 +/-    1.04  0.080 / 0.200