PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-14:13:00
G03     219.3          66.3                9.9 +/-    0.98      10.7 +/-    0.98  0.090 / 0.340
G07     250.2          13.5                8.4 +/-    3.49      21.7 +/-    3.49  0.090 / 0.390
G09     303.9          18.3                6.7 +/-    1.35      15.4 +/-    1.35  0.120 / 0.410
G14     101.1          12.6                9.6 +/-    4.68      25.2 +/-    4.68  0.180 / 0.260
G16     130.9          58.9               12.2 +/-    0.80      14.0 +/-    0.80  0.170 / 0.130
G22     188.6          50.0               12.4 +/-    0.87      15.6 +/-    0.87  0.100 / 0.170
G23     320.7          50.6                9.7 +/-    1.01      12.2 +/-    1.01  0.050 / 0.040
G26     69.8           52.7                7.7 +/-    0.49       9.5 +/-    0.49  0.050 / 0.040
G31     53.0           18.8                9.0 +/-    1.60      20.4 +/-    1.60  0.040 / 0.060