PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-21:12:30
G10     252.0          29.5               11.7 +/-    1.53      20.6 +/-    1.53  0.040 / 0.050
G13     51.5           27.8                7.4 +/-    1.08      13.6 +/-    1.08  0.040 / 0.050
G15     83.8           57.5               10.3 +/-    0.46      12.0 +/-    0.46  0.160 / 0.750
G16     294.0          15.7                7.4 +/-    3.80      18.2 +/-    3.80  0.140 / 0.740
G20     272.8          52.2               11.4 +/-    0.99      14.0 +/-    0.99  0.060 / 0.160
G21     335.3          60.5                9.7 +/-    0.45      11.0 +/-    0.45  0.080 / 0.160
G26     266.6          14.8               11.2 +/-    2.07      27.8 +/-    2.07  0.030 / 0.050
G29     164.0          48.4                9.8 +/-    1.27      12.6 +/-    1.27  0.030 / 0.050