PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/11-13:27:40
G08     287.1          23.7                2.1 +/-    0.63       4.3 +/-    0.63  0.180 / 0.160
G10     19.0           62.8                4.2 +/-    1.16       4.6 +/-    1.16  0.260 / 0.190
G14     233.9          51.3                6.3 +/-    2.50       7.8 +/-    2.50  0.060 / 0.060
G18     317.4          17.0                2.3 +/-    2.30       5.5 +/-    2.30  0.080 / 0.080
G20     71.6           49.6                3.7 +/-    0.70       4.7 +/-    0.70  0.060 / 0.110
G21     147.7          31.0                3.7 +/-    0.82       6.4 +/-    0.82  0.050 / 0.110
G24     50.4           21.4                3.6 +/-    2.96       7.6 +/-    2.96  0.040 / 0.020
G27     252.6          29.7                4.3 +/-    1.74       7.5 +/-    1.74  0.030 / 0.030
G32     252.0          68.3                4.5 +/-    0.34       4.8 +/-    0.34  0.260 / 0.330