PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-00:28:00
G08     298.3          21.0                7.3 +/-    2.13      15.6 +/-    2.13  0.110 / 0.110
G10     10.5           62.7                7.2 +/-    1.13       8.0 +/-    1.13  0.080 / 0.130
G14     228.7          44.7               12.0 +/-    2.51      16.2 +/-    2.51  0.050 / 0.090
G20     65.3           52.2                9.3 +/-    1.13      11.4 +/-    1.13  0.050 / 0.070
G21     146.8          41.7               11.0 +/-    1.08      15.6 +/-    1.08  0.110 / 0.210
G24     57.2           26.2                9.3 +/-    2.68      17.7 +/-    2.68  0.090 / 0.220
G27     255.1          32.3                9.2 +/-    2.58      15.4 +/-    2.58  0.050 / 0.030
G32     244.2          67.3                9.1 +/-    0.65       9.8 +/-    0.65  0.040 / 0.030