PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-16:12:40
G07     302.7          46.7               13.8 +/-    1.66      18.1 +/-    1.66  0.050 / 0.040
G08     135.1          34.0               15.9 +/-    1.36      25.7 +/-    1.36  0.040 / 0.050
G09     317.6          68.9               13.5 +/-    1.04      14.4 +/-    1.04  0.050 / 0.060
G16     42.2           35.4               11.8 +/-    0.92      18.5 +/-    0.92  0.030 / 0.070
G23     133.4          72.8               15.5 +/-    0.52      16.1 +/-    0.52  0.110 / 0.240
G27     92.9           36.2               13.5 +/-    1.10      20.9 +/-    1.10  0.100 / 0.180
G30     279.8          18.3               13.2 +/-    1.74      30.4 +/-    1.74  0.050 / 0.040