PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-21:43:10
G08     305.4          20.1                8.2 +/-    2.29      17.9 +/-    2.29  0.040 / 0.050
G10     350.4          62.0               10.2 +/-    0.52      11.4 +/-    0.52  0.050 / 0.050
G14     221.8          34.9               13.3 +/-    2.24      21.1 +/-    2.24  0.120 / 0.190
G20     52.2           56.3               10.7 +/-    0.50      12.5 +/-    0.50  0.150 / 0.180
G21     140.8          50.9               12.8 +/-    0.62      15.9 +/-    0.62  0.080 / 0.040
G24     67.2           29.6               11.3 +/-    1.30      20.0 +/-    1.30  0.050 / 0.040
G27     265.9          36.2               12.7 +/-    1.32      19.7 +/-    1.32  0.070 / 0.070
G32     229.9          59.8               12.1 +/-    1.70      13.7 +/-    1.70  0.090 / 0.080