PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-22:43:00
G10     250.4          28.1               11.5 +/-    1.35      21.1 +/-    1.35  0.110 / 0.400
G13     53.2           28.9                8.5 +/-    1.45      15.2 +/-    1.45  0.090 / 0.380
G15     86.4           57.5               11.4 +/-    0.85      13.3 +/-    0.85  0.040 / 0.040
G16     296.3          15.6                6.9 +/-    1.31      16.8 +/-    1.31  0.030 / 0.050
G20     269.7          50.4               11.0 +/-    2.46      13.8 +/-    2.46  0.110 / 0.170
G21     333.1          59.3                8.9 +/-    0.82      10.1 +/-    0.82  0.110 / 0.130
G26     268.6          15.6                9.6 +/-    2.69      23.6 +/-    2.69  0.030 / 0.040
G29     163.2          50.0               11.7 +/-    0.64      14.7 +/-    0.64  0.040 / 0.040