PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-21:42:30
G07     321.6          53.3               12.7 +/-    0.49      15.5 +/-    0.49  0.170 / 0.270
G08     115.7          48.9               16.5 +/-    0.73      21.1 +/-    0.73  0.240 / 0.270
G09     223.6          81.3               15.0 +/-    0.57      15.1 +/-    0.57  0.060 / 0.070
G16     44.5           13.9                9.8 +/-    1.11      25.0 +/-    1.11  0.050 / 0.050
G23     151.8          48.3               15.7 +/-    0.39      20.3 +/-    0.39  0.120 / 0.300
G27     62.5           34.6               12.7 +/-    0.52      20.3 +/-    0.52  0.100 / 0.330
G28     231.8          23.8               15.7 +/-    2.49      31.5 +/-    2.49  0.040 / 0.040
G30     297.9          33.3               11.5 +/-    2.10      18.9 +/-    2.10  0.040 / 0.050