PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-01:42:30
G10     287.1          48.1               11.7 +/-    2.02      15.1 +/-    2.02  0.090 / 0.110
G15     48.5           37.0                9.0 +/-    1.68      13.8 +/-    1.68  0.080 / 0.100
G20     301.7          55.6               10.7 +/-    1.98      12.6 +/-    1.98  0.040 / 0.050
G21     63.0           77.5               12.1 +/-    2.35      12.4 +/-    2.35  0.040 / 0.050
G24     103.9          23.3               13.3 +/-    2.20      27.0 +/-    2.20  0.090 / 0.210
G27     307.7          30.4                9.0 +/-    2.77      15.6 +/-    2.77  0.090 / 0.190
G29     169.0          15.3               16.6 +/-    4.25      41.1 +/-    4.25  0.040 / 0.060
G32     207.5          26.6               14.8 +/-    2.52      27.9 +/-    2.52  0.040 / 0.050