PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-08:58:10
G08     270.8          19.7                8.4 +/-    1.08      18.6 +/-    1.08  0.160 / 0.430
G10     55.7           58.8                5.7 +/-    0.92       6.5 +/-    0.92  0.420 / 0.290
G14     259.1          64.7                7.8 +/-    0.48       8.5 +/-    0.48  0.100 / 0.230
G18     313.7          30.5                5.6 +/-    0.78       9.8 +/-    0.78  0.100 / 0.170
G20     91.9           38.9                5.7 +/-    0.77       8.5 +/-    0.77  0.040 / 0.040
G21     153.9          17.7                5.0 +/-    4.21      11.7 +/-    4.21  0.040 / 0.030
G24     40.9           11.7                2.8 +/-    2.05       7.4 +/-    2.05  0.260 / 0.190
G27     236.0          19.0                7.0 +/-    3.08      15.7 +/-    3.08  0.200 / 0.360
G31     179.3          26.1                5.7 +/-    0.99      10.8 +/-    0.99  0.050 / 0.060
G32     305.0          74.7                6.7 +/-    0.61       6.9 +/-    0.61  0.040 / 0.060