PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-20:58:00
G05     50.4           13.3                8.3 +/-    0.73      21.5 +/-    0.73  0.110 / 0.330
G10     239.4          17.9               12.2 +/-    2.02      28.2 +/-    2.02  0.100 / 0.380
G13     68.1           34.5                9.1 +/-    0.88      14.6 +/-    0.88  0.170 / 0.260
G15     116.1          55.4               11.4 +/-    0.65      13.5 +/-    0.65  0.110 / 0.320
G16     309.4          14.1                8.7 +/-    1.37      22.0 +/-    1.37  0.050 / 0.060
G20     253.6          41.2               11.3 +/-    1.10      16.1 +/-    1.10  0.070 / 0.080
G21     318.0          49.6               12.1 +/-    0.86      15.3 +/-    0.86  0.080 / 0.170
G26     282.3          19.5                9.9 +/-    2.18      22.0 +/-    2.18  0.060 / 0.170
G29     157.0          66.5                9.8 +/-    1.22      10.6 +/-    1.22  0.050 / 0.130