PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-15:27:40
G07     324.6          55.8                9.3 +/-    0.79      11.0 +/-    0.79  0.150 / 0.120
G08     117.9          46.2               11.7 +/-    0.69      15.5 +/-    0.69  0.130 / 0.130
G09     261.0          82.6               11.5 +/-    0.38      11.6 +/-    0.38  0.030 / 0.040
G16     43.3           19.3                7.8 +/-    2.00      17.5 +/-    2.00  0.040 / 0.040
G23     149.8          54.1               11.3 +/-    0.50      13.6 +/-    0.50  0.160 / 0.270
G27     70.5           37.0                9.8 +/-    0.77      15.0 +/-    0.77  0.310 / 0.410
G28     227.9          15.0                7.5 +/-    7.98      18.7 +/-    7.98  0.050 / 0.070
G30     293.4          29.3                9.1 +/-    2.28      16.1 +/-    2.28  0.060 / 0.070