PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-12:42:40
G03     226.5          68.0                6.3 +/-    0.81       6.8 +/-    0.81  0.040 / 0.060
G07     249.0          12.5                4.4 +/-    2.89      11.6 +/-    2.89  0.040 / 0.050
G09     302.8          16.9                4.0 +/-    3.48       9.6 +/-    3.48  0.140 / 0.300
G14     99.5           14.0                6.8 +/-    2.65      17.4 +/-    2.65  0.190 / 0.280
G16     131.8          57.8                9.2 +/-    0.54      10.7 +/-    0.54  0.040 / 0.040
G22     191.2          53.0                6.7 +/-    0.58       8.2 +/-    0.58  0.050 / 0.040
G23     319.9          49.9                5.3 +/-    0.53       6.7 +/-    0.53  0.190 / 0.390
G26     71.8           53.0                5.1 +/-    0.76       6.2 +/-    0.76  0.150 / 0.350
G31     52.3           19.5                5.8 +/-    3.32      12.8 +/-    3.32  0.030 / 0.040