PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/17-17:42:50
G10     258.5          34.4                8.9 +/-    2.11      14.2 +/-    2.11  0.350 / 0.490
G13     46.3           23.4                8.5 +/-    2.44      17.2 +/-    2.44  0.360 / 0.310
G15     69.1           53.4                8.7 +/-    0.72      10.5 +/-    0.72  0.050 / 0.040
G20     285.0          57.4                7.2 +/-    1.46       8.4 +/-    1.46  0.040 / 0.040
G21     345.6          65.6                8.7 +/-    0.90       9.5 +/-    0.90  0.040 / 0.070
G26     260.5          11.9                6.5 +/-    5.42      17.3 +/-    5.42  0.040 / 0.070
G27     321.8          11.7               -0.8 +/-   29.37      -2.2 +/-   29.37  0.070 / 0.180
G29     166.0          41.6                9.9 +/-    0.93      14.0 +/-    0.93  0.080 / 0.210