PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-23:27:50
G03     242.5          68.6                5.6 +/-    0.57       6.0 +/-    0.57  0.040 / 0.040
G09     302.6          16.8                5.6 +/-    1.16      13.4 +/-    1.16  0.040 / 0.030
G14     99.0           15.0                6.3 +/-    2.17      15.8 +/-    2.17  0.140 / 0.150
G16     136.2          57.3                8.8 +/-    1.12      10.2 +/-    1.12  0.260 / 0.190
G22     196.9          57.4                6.5 +/-    0.59       7.6 +/-    0.59  0.030 / 0.040
G23     317.7          47.4                5.5 +/-    1.09       7.2 +/-    1.09  0.030 / 0.050
G26     73.6           53.6                5.5 +/-    0.40       6.6 +/-    0.40  0.150 / 0.210
G31     51.0           22.3                4.7 +/-    2.83       9.8 +/-    2.83  0.160 / 0.220