PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-04:27:50
G03     234.0          66.4                2.6 +/-    0.57       2.8 +/-    0.57  0.050 / 0.060
G09     307.2          25.8                1.1 +/-    1.60       2.1 +/-    1.60  0.050 / 0.070
G14     102.0          12.8                4.0 +/-    1.44      10.5 +/-    1.44  0.170 / 0.410
G16     116.6          61.1                6.0 +/-    0.32       6.8 +/-    0.32  0.150 / 0.440
G22     194.6          52.6                5.8 +/-    0.94       7.1 +/-    0.94  0.060 / 0.060
G23     320.9          50.7                2.9 +/-    1.31       3.6 +/-    1.31  0.070 / 0.060
G26     63.8           49.3                3.1 +/-    0.72       4.0 +/-    0.72  0.050 / 0.050
G31     54.1           16.8                1.3 +/-    0.70       3.0 +/-    0.70  0.040 / 0.040