PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-22:57:40
G03     229.5          65.9                7.3 +/-    1.06       7.9 +/-    1.06  0.060 / 0.040
G07     250.9          11.6                0.3 +/-   17.40       0.8 +/-   17.40  0.060 / 0.040
G09     306.4          23.4                7.3 +/-    1.07      14.9 +/-    1.07  0.110 / 0.290
G14     102.9          11.3                7.7 +/-    1.80      21.0 +/-    1.80  0.140 / 0.250
G16     120.3          61.2                8.8 +/-    0.32       9.9 +/-    0.32  0.040 / 0.040
G22     193.7          51.5                9.0 +/-    0.65      11.2 +/-    0.65  0.040 / 0.040
G23     320.6          50.4                6.9 +/-    0.68       8.7 +/-    0.68  0.040 / 0.040
G26     65.8           51.3                5.5 +/-    1.23       6.8 +/-    1.23  0.050 / 0.050
G31     53.3           19.7                5.8 +/-    2.96      12.8 +/-    2.96  0.130 / 0.400