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                7.4 +/-    1.52      17.8 +/-    1.52  0.030 / 0.030
G10     70.4           55.3                5.6 +/-    0.65       6.6 +/-    0.65  0.030 / 0.020
G11     307.8          20.3                3.7 +/-    1.76       8.2 +/-    1.76  0.230 / 0.520
G14     278.9          69.3                6.0 +/-    0.58       6.4 +/-    0.58  0.130 / 0.490
G18     309.0          37.3                5.7 +/-    1.27       8.6 +/-    1.27  0.130 / 0.430
G20     99.9           33.3                6.3 +/-    0.58      10.4 +/-    0.58  0.140 / 0.400
G21     155.2          10.0                4.4 +/-    3.36      12.2 +/-    3.36  0.040 / 0.050
G27     229.8          13.5                4.1 +/-    2.37      10.5 +/-    2.37  0.040 / 0.040
G31     177.7          34.6                6.2 +/-    1.57       9.9 +/-    1.57  0.120 / 0.300
G32     336.7          73.1                6.5 +/-    0.68       6.8 +/-    0.68  0.110 / 0.280