PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-09:27:50
G08     270.5          19.7                6.2 +/-    2.24      13.8 +/-    2.24  0.110 / 0.190
G10     56.0           58.8                4.6 +/-    0.77       5.3 +/-    0.77  0.160 / 0.250
G14     259.5          64.9                5.4 +/-    0.93       5.9 +/-    0.93  0.040 / 0.030
G18     313.6          30.8                4.2 +/-    1.19       7.2 +/-    1.19  0.030 / 0.020
G20     92.0           38.8                5.2 +/-    1.28       7.8 +/-    1.28  0.120 / 0.310
G21     153.9          17.3                3.9 +/-    1.87       9.2 +/-    1.87  0.170 / 0.400
G24     40.8           11.4                2.7 +/-    2.11       7.3 +/-    2.11  0.040 / 0.040
G27     236.0          18.9                5.1 +/-    4.53      11.4 +/-    4.53  0.050 / 0.040
G31     179.5          26.0                5.0 +/-    1.49       9.5 +/-    1.49  0.020 / 0.030
G32     304.4          74.6                5.0 +/-    0.48       5.2 +/-    0.48  0.030 / 0.020