PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-21:42:40
G10     261.4          36.1               12.7 +/-    1.10      19.8 +/-    1.10  0.050 / 0.040
G13     44.5           21.4                7.8 +/-    2.14      16.6 +/-    2.14  0.050 / 0.030
G15     66.6           53.1                9.8 +/-    0.79      11.9 +/-    0.79  0.100 / 0.220
G16     284.4          14.1                8.0 +/-    1.44      20.2 +/-    1.44  0.190 / 0.340
G20     288.1          57.7               10.7 +/-    1.88      12.4 +/-    1.88  0.030 / 0.030
G21     349.6          67.4                8.7 +/-    0.71       9.4 +/-    0.71  0.040 / 0.040
G24     126.3          10.8                5.3 +/-   23.92      14.6 +/-   23.92  0.100 / 0.350
G27     321.1          13.8                6.3 +/-    1.84      16.1 +/-    1.84  0.140 / 0.430
G29     166.2          37.5                9.6 +/-    1.22      14.5 +/-    1.22  0.090 / 0.080