PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-03:27:50
G08     266.9          16.5                9.1 +/-    1.35      21.8 +/-    1.35  0.040 / 0.050
G10     69.9           55.3                6.7 +/-    1.37       7.9 +/-    1.37  0.040 / 0.040
G11     309.1          19.1                4.8 +/-    2.49      10.9 +/-    2.49  0.170 / 0.380
G14     274.6          68.0                6.4 +/-    0.70       6.9 +/-    0.70  0.180 / 0.410
G18     310.0          36.0                5.9 +/-    1.04       9.3 +/-    1.04  0.150 / 0.390
G20     99.3           34.2                7.4 +/-    1.24      11.9 +/-    1.24  0.170 / 0.580
G21     155.9          12.3                4.8 +/-    2.85      12.8 +/-    2.85  0.180 / 0.250
G27     229.3          13.7                8.2 +/-    1.97      20.9 +/-    1.97  0.170 / 0.320
G31     176.2          35.6                6.8 +/-    2.02      10.7 +/-    2.02  0.030 / 0.040
G32     347.2          72.7                6.5 +/-    0.39       6.8 +/-    0.39  0.030 / 0.040