PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-09:43:00
G08     264.0          17.0                6.6 +/-    1.70      15.6 +/-    1.70  0.300 / 0.530
G10     68.2           56.0                4.7 +/-    0.58       5.6 +/-    0.58  0.250 / 0.510
G11     308.7          19.7                3.7 +/-    1.84       8.3 +/-    1.84  0.030 / 0.030
G14     275.6          68.8                4.5 +/-    0.67       4.8 +/-    0.67  0.030 / 0.030
G18     309.8          36.5                5.5 +/-    0.84       8.5 +/-    0.84  0.190 / 0.240
G20     98.8           34.2                4.7 +/-    0.94       7.6 +/-    0.94  0.110 / 0.310
G21     155.0          10.8                4.6 +/-    7.14      12.5 +/-    7.14  0.040 / 0.050
G27     230.8          14.3                5.2 +/-    2.81      13.3 +/-    2.81  0.040 / 0.050
G31     178.1          33.1                4.8 +/-    0.92       7.9 +/-    0.92  0.020 / 0.020
G32     330.9          73.6                5.8 +/-    0.43       6.0 +/-    0.43  0.030 / 0.020