PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-08:43:10
G08     272.2          20.1                8.4 +/-    2.09      18.5 +/-    2.09  0.030 / 0.030
G10     53.4           59.3                4.9 +/-    0.77       5.6 +/-    0.77  0.030 / 0.030
G14     256.6          63.9                7.6 +/-    0.46       8.3 +/-    0.46  0.120 / 0.320
G18     314.3          29.4                5.6 +/-    1.19       9.9 +/-    1.19  0.120 / 0.250
G20     90.6           39.7                5.4 +/-    0.96       7.9 +/-    0.96  0.130 / 0.350
G21     153.7          19.0                6.1 +/-    2.30      13.7 +/-    2.30  0.150 / 0.200
G24     41.5           12.6                1.2 +/-    3.75       3.0 +/-    3.75  0.060 / 0.050
G27     236.9          19.8                6.1 +/-    3.03      13.5 +/-    3.03  0.050 / 0.060
G31     179.5          24.9                5.4 +/-    2.10      10.5 +/-    2.10  0.120 / 0.160
G32     300.5          74.7                6.3 +/-    0.39       6.5 +/-    0.39  0.270 / 0.190