PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-09:27:50
G08     265.2          17.5                4.8 +/-    1.45      11.2 +/-    1.45  0.150 / 0.270
G10     66.1           56.5                5.1 +/-    0.46       6.0 +/-    0.46  0.260 / 0.310
G11     309.7          19.0                3.5 +/-    1.88       7.9 +/-    1.88  0.220 / 0.330
G14     272.3          68.2                6.4 +/-    0.34       6.8 +/-    0.34  0.180 / 0.240
G18     310.6          35.4                4.7 +/-    0.91       7.4 +/-    0.91  0.030 / 0.030
G20     97.6           35.0                5.1 +/-    0.75       8.2 +/-    0.75  0.030 / 0.030
G21     154.8          12.1                4.0 +/-    3.91      10.6 +/-    3.91  0.180 / 0.210
G27     231.7          15.2                4.4 +/-    2.15      10.9 +/-    2.15  0.090 / 0.170
G31     178.3          31.8                6.8 +/-    1.41      11.5 +/-    1.41  0.050 / 0.050
G32     327.0          74.0                5.3 +/-    0.82       5.5 +/-    0.82  0.040 / 0.050