PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-08:28:10
G01     222.3          13.1                4.8 +/-    4.25      12.6 +/-    4.25  0.040 / 0.050
G03     272.5          69.4                7.0 +/-    0.37       7.5 +/-    0.37  0.030 / 0.040
G09     298.1          12.8                3.4 +/-   15.42       8.9 +/-   15.42  0.220 / 0.710
G14     90.7           22.7                5.1 +/-    1.60      10.6 +/-    1.60  0.150 / 0.700
G16     137.1          51.5                8.0 +/-    0.52       9.9 +/-    0.52  0.110 / 0.170
G22     204.2          65.2                7.4 +/-    0.70       8.1 +/-    0.70  0.100 / 0.210
G23     312.3          42.4                5.6 +/-    1.08       7.8 +/-    1.08  0.050 / 0.080
G26     83.0           53.3                7.6 +/-    1.34       9.2 +/-    1.34  0.060 / 0.090
G31     48.2           25.3                3.8 +/-    3.15       7.4 +/-    3.15  0.040 / 0.040