PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/17-17:43:00
G10     258.5          34.4                8.9 +/-    1.28      14.3 +/-    1.28  0.190 / 0.270
G13     46.3           23.4                8.1 +/-    0.87      16.5 +/-    0.87  0.120 / 0.250
G15     69.1           53.4                9.4 +/-    0.34      11.4 +/-    0.34  0.050 / 0.060
G20     285.0          57.4                9.3 +/-    0.91      10.8 +/-    0.91  0.050 / 0.060
G21     345.6          65.6                7.4 +/-    0.94       8.0 +/-    0.94  0.050 / 0.080
G26     260.5          11.9                7.9 +/-    1.83      21.1 +/-    1.83  0.040 / 0.080
G27     321.8          11.7                2.8 +/-   25.24       7.6 +/-   25.24  0.090 / 0.090
G29     166.0          41.6               11.6 +/-    0.70      16.4 +/-    0.70  0.090 / 0.110