PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/16-21:58:00
G10     258.9          34.5               10.4 +/-    1.81      16.7 +/-    1.81  0.430 / 0.330
G13     46.0           23.1                6.6 +/-    2.00      13.5 +/-    2.00  0.130 / 0.200
G15     70.1           54.4                9.0 +/-    0.47      10.8 +/-    0.47  0.070 / 0.080
G16     286.9          14.7                6.5 +/-    3.27      16.4 +/-    3.27  0.070 / 0.070
G20     283.8          56.3                8.4 +/-    2.13       9.8 +/-    2.13  0.040 / 0.030
G21     345.5          65.7                8.8 +/-    1.05       9.6 +/-    1.05  0.040 / 0.040
G27     321.8          11.8                1.7 +/-   22.22       4.4 +/-   22.22  0.090 / 0.200
G29     165.7          40.1                9.9 +/-    1.05      14.4 +/-    1.05  0.100 / 0.250