PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-08:28:00
G01     318.7          19.6                3.7 +/-    1.21       8.2 +/-    1.21  0.140 / 0.280
G08     256.9          12.9                4.3 +/-   11.87      11.3 +/-   11.87  0.100 / 0.260
G10     82.1           51.4                4.2 +/-    0.78       5.3 +/-    0.78  0.210 / 0.240
G11     301.6          23.8                3.0 +/-    1.77       6.0 +/-    1.77  0.200 / 0.270
G14     301.3          71.4                4.4 +/-    0.53       4.6 +/-    0.53  0.040 / 0.030
G18     302.7          42.7                5.5 +/-    2.01       7.7 +/-    2.01  0.030 / 0.030
G20     106.5          28.2                5.6 +/-    1.41      10.1 +/-    1.41  0.050 / 0.050
G22     302.3          13.9                4.0 +/-    1.43      10.2 +/-    1.43  0.050 / 0.050
G31     175.6          43.0                6.4 +/-    1.20       8.9 +/-    1.20  0.030 / 0.040
G32     359.8          69.0                4.6 +/-    1.24       4.9 +/-    1.24  0.030 / 0.030