PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-09:12:50
G08     263.0          16.4                6.5 +/-    2.85      15.6 +/-    2.85  0.250 / 0.390
G10     70.4           55.3                4.7 +/-    0.45       5.5 +/-    0.45  0.180 / 0.360
G11     307.8          20.3                6.2 +/-    3.11      13.6 +/-    3.11  0.040 / 0.060
G14     278.9          69.3                5.5 +/-    0.65       5.8 +/-    0.65  0.050 / 0.060
G18     309.0          37.3                4.6 +/-    1.03       7.0 +/-    1.03  0.240 / 0.440
G20     99.9           33.3                6.1 +/-    1.35      10.0 +/-    1.35  0.310 / 0.430
G21     155.2          10.0                4.5 +/-    3.15      12.5 +/-    3.15  0.030 / 0.040
G27     229.8          13.5                4.4 +/-    4.24      11.2 +/-    4.24  0.030 / 0.040
G31     177.7          34.6                7.5 +/-    1.37      12.0 +/-    1.37  0.180 / 0.370
G32     336.7          73.1                5.9 +/-    0.54       6.2 +/-    0.54  0.130 / 0.400