PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-21:42:40
G10     259.5          34.9               10.8 +/-    1.47      17.2 +/-    1.47  0.040 / 0.050
G13     45.6           22.7                7.9 +/-    2.05      16.3 +/-    2.05  0.040 / 0.040
G15     69.3           54.2               10.3 +/-    0.43      12.4 +/-    0.43  0.130 / 0.230
G16     286.2          14.5                7.7 +/-    1.07      19.3 +/-    1.07  0.110 / 0.180
G20     284.9          56.7               10.2 +/-    2.01      11.9 +/-    2.01  0.040 / 0.040
G21     346.5          66.1                9.4 +/-    0.88      10.2 +/-    0.88  0.040 / 0.040
G24     127.7          9.7               -14.7 +/-   23.47     -41.4 +/-   23.47  0.110 / 0.320
G26     259.5          11.4                9.7 +/-    4.70      26.4 +/-    4.70  0.100 / 0.290
G27     321.6          12.3                5.6 +/-    4.37      14.7 +/-    4.37  0.230 / 0.430
G29     165.9          39.5               11.5 +/-    0.80      16.9 +/-    0.80  0.220 / 0.340