PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-11:42:50
G08     264.4          17.6                6.1 +/-    1.02      14.3 +/-    1.02  0.220 / 0.530
G10     65.9           56.7                4.4 +/-    0.94       5.1 +/-    0.94  0.290 / 0.480
G11     309.5          19.2                2.9 +/-    1.24       6.5 +/-    1.24  0.040 / 0.050
G14     272.6          68.3                6.4 +/-    0.54       6.9 +/-    0.54  0.030 / 0.040
G18     310.3          36.1                5.0 +/-    1.05       7.7 +/-    1.05  0.030 / 0.030
G20     97.5           35.0                4.8 +/-    0.92       7.6 +/-    0.92  0.030 / 0.030
G21     154.4          10.8                5.4 +/-    2.41      14.7 +/-    2.41  0.020 / 0.020
G27     232.1          15.3                6.1 +/-    2.58      15.0 +/-    2.58  0.040 / 0.020
G31     179.3          30.7                5.8 +/-    1.36      10.1 +/-    1.36  0.190 / 0.230
G32     327.7          73.9                6.0 +/-    0.43       6.2 +/-    0.43  0.150 / 0.360