PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-16:42:40
G07     312.3          50.9               12.3 +/-    0.72      15.4 +/-    0.72  0.050 / 0.050
G08     127.3          40.3               13.5 +/-    0.72      19.6 +/-    0.72  0.040 / 0.050
G09     306.7          77.0               11.5 +/-    0.56      11.7 +/-    0.56  0.060 / 0.060
G16     42.0           28.1                8.8 +/-    1.88      16.1 +/-    1.88  0.060 / 0.060
G23     143.7          64.5               13.0 +/-    0.55      14.2 +/-    0.55  0.040 / 0.030
G27     82.3           37.7               12.1 +/-    1.09      18.3 +/-    1.09  0.030 / 0.030
G30     286.0          23.1               12.7 +/-    0.87      26.1 +/-    0.87  0.090 / 0.160