PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-15:27:50
G07     317.0          53.0                9.0 +/-    1.07      10.9 +/-    1.07  0.040 / 0.040
G08     124.7          42.5               10.7 +/-    0.71      15.0 +/-    0.71  0.050 / 0.050
G09     297.0          79.6                7.5 +/-    0.66       7.6 +/-    0.66  0.090 / 0.150
G16     42.4           24.3                7.9 +/-    2.45      15.6 +/-    2.45  0.120 / 0.190
G23     146.1          60.3               10.8 +/-    0.81      12.2 +/-    0.81  0.180 / 0.190
G27     77.8           37.7               10.3 +/-    1.02      15.6 +/-    1.02  0.140 / 0.190
G30     288.9          25.7                8.9 +/-    1.55      17.2 +/-    1.55  0.060 / 0.060