PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-21:43:00
G10     261.4          36.1               10.8 +/-    1.47      16.8 +/-    1.47  0.050 / 0.050
G13     44.5           21.4                7.2 +/-    2.91      15.4 +/-    2.91  0.050 / 0.050
G15     66.6           53.1                9.3 +/-    0.72      11.3 +/-    0.72  0.110 / 0.340
G16     284.4          14.1                9.0 +/-    1.72      22.8 +/-    1.72  0.110 / 0.330
G20     288.1          57.7               10.3 +/-    1.56      12.0 +/-    1.56  0.090 / 0.200
G21     349.6          67.4                5.9 +/-    1.04       6.3 +/-    1.04  0.130 / 0.250
G24     126.3          10.8                0.4 +/-   33.32       1.1 +/-   33.32  0.080 / 0.310
G26     257.9          10.5               10.3 +/-    2.66      28.5 +/-    2.66  0.080 / 0.260
G27     321.1          13.8                7.9 +/-    2.61      20.1 +/-    2.61  0.160 / 0.270
G29     166.2          37.5               11.0 +/-    1.72      16.7 +/-    1.72  0.120 / 0.280