PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-21:58:10
G03     218.1          61.8                9.3 +/-    1.67      10.4 +/-    1.67  0.050 / 0.050
G07     253.5          12.3               10.7 +/-    3.66      28.5 +/-    3.66  0.050 / 0.070
G09     307.7          23.6                7.8 +/-    2.46      15.7 +/-    2.46  0.160 / 0.180
G14     106.2          9.3                 9.8 +/-    2.72      27.8 +/-    2.72  0.080 / 0.190
G16     113.7          64.1               11.1 +/-    0.21      12.2 +/-    0.21  0.040 / 0.040
G22     190.4          46.8               10.4 +/-    0.91      13.7 +/-    0.91  0.030 / 0.030
G23     326.1          55.9                8.2 +/-    0.47       9.7 +/-    0.47  0.100 / 0.210
G26     58.7           47.5                7.6 +/-    0.75       9.9 +/-    0.75  0.330 / 0.310
G31     56.5           14.1                5.0 +/-    1.62      12.6 +/-    1.62  0.240 / 0.410