PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-09:57:40
G01     320.7          13.3              -18.9 +/-   15.57     -48.9 +/-   15.57  0.100 / 0.270
G08     262.7          16.4                6.9 +/-    1.02      16.5 +/-    1.02  0.110 / 0.340
G10     70.3           55.4                4.3 +/-    0.46       5.2 +/-    0.46  0.030 / 0.030
G11     307.8          20.4                3.3 +/-    1.96       7.2 +/-    1.96  0.020 / 0.020
G14     279.0          69.4                4.5 +/-    0.47       4.8 +/-    0.47  0.030 / 0.020
G18     308.9          37.5                5.0 +/-    1.27       7.5 +/-    1.27  0.030 / 0.020
G20     99.9           33.3                5.0 +/-    0.87       8.3 +/-    0.87  0.040 / 0.050
G27     229.9          13.5                4.4 +/-    2.46      11.2 +/-    2.46  0.040 / 0.050
G31     178.0          34.3                4.7 +/-    1.64       7.5 +/-    1.64  0.130 / 0.380
G32     331.7          73.2                5.4 +/-    0.80       5.6 +/-    0.80  0.110 / 0.320