PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/02-01:57:40
G10     255.6          30.7               12.1 +/-    1.68      20.8 +/-    1.68  0.120 / 0.450
G13     48.8           26.5                9.0 +/-    2.45      16.9 +/-    2.45  0.150 / 0.590
G15     77.7           56.9               10.2 +/-    0.40      11.9 +/-    0.40  0.030 / 0.030
G16     288.8          15.2                6.9 +/-    3.02      17.0 +/-    3.02  0.040 / 0.040
G20     272.5          48.9               13.2 +/-    3.10      16.9 +/-    3.10  0.040 / 0.050
G21     340.0          63.6               10.1 +/-    0.73      11.2 +/-    0.73  0.050 / 0.050
G26     261.1          13.2               10.7 +/-    3.07      27.8 +/-    3.07  0.110 / 0.130
G29     166.6          44.5               12.2 +/-    0.68      16.6 +/-    0.68  0.160 / 0.160