PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-09:12:30
G08     294.7          23.2                6.1 +/-    1.06      12.3 +/-    1.06  0.040 / 0.040
G10     6.1            62.8                6.0 +/-    1.09       6.6 +/-    1.09  0.050 / 0.020
G14     227.9          45.7                8.1 +/-    2.38      10.8 +/-    2.38  0.050 / 0.080
G20     63.2           53.0                7.0 +/-    0.79       8.6 +/-    0.79  0.060 / 0.070
G21     145.4          40.0                7.8 +/-    1.24      11.4 +/-    1.24  0.020 / 0.020
G24     56.6           25.4                5.7 +/-    2.07      11.0 +/-    2.07  0.030 / 0.030
G27     258.3          32.8                6.1 +/-    2.08      10.1 +/-    2.08  0.100 / 0.130
G32     239.1          60.6                7.0 +/-    1.92       7.9 +/-    1.92  0.080 / 0.110