PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-19:58:00
G10     270.1          41.3                9.6 +/-    1.33      13.6 +/-    1.33  0.040 / 0.040
G13     40.4           15.4                7.3 +/-    2.57      17.9 +/-    2.57  0.040 / 0.050
G15     56.8           47.1                9.8 +/-    1.03      12.9 +/-    1.03  0.210 / 0.440
G20     304.6          61.9                9.0 +/-    0.63      10.1 +/-    0.63  0.160 / 0.370
G21     7.0            72.7               10.5 +/-    1.19      11.0 +/-    1.19  0.030 / 0.050
G24     120.2          15.4               11.0 +/-    2.50      27.0 +/-    2.50  0.050 / 0.050
G27     317.9          20.4                7.8 +/-    2.30      16.9 +/-    2.30  0.150 / 0.270
G29     167.6          29.5               11.2 +/-    1.19      19.9 +/-    1.19  0.290 / 0.280
G32     204.2          11.5               -1.4 +/-   39.97      -3.7 +/-   39.97  0.140 / 0.380