PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-19:13:20
G03     229.0          67.5               12.5 +/-    0.46      13.4 +/-    0.46  0.060 / 0.050
G09     303.3          17.4               10.3 +/-    1.64      24.1 +/-    1.64  0.060 / 0.040
G14     99.7           15.4               11.8 +/-    1.84      29.1 +/-    1.84  0.160 / 0.260
G16     127.4          59.4               14.4 +/-    0.45      16.5 +/-    0.45  0.220 / 0.300
G22     192.9          54.2               13.4 +/-    0.40      16.1 +/-    0.40  0.030 / 0.050
G23     320.7          50.6               12.3 +/-    0.61      15.3 +/-    0.61  0.030 / 0.050
G26     68.0           51.1               11.4 +/-    1.32      14.2 +/-    1.32  0.100 / 0.300
G31     52.6           18.8                9.9 +/-    2.12      22.5 +/-    2.12  0.120 / 0.270