PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-18:57:40
G07     320.6          52.8               11.3 +/-    1.54      13.8 +/-    1.54  0.040 / 0.080
G08     120.0          48.3               13.2 +/-    1.51      17.0 +/-    1.51  0.050 / 0.090
G09     225.8          81.7               11.1 +/-    1.04      11.2 +/-    1.04  0.040 / 0.080
G16     44.4           13.3                7.9 +/-    2.09      20.6 +/-    2.09  0.040 / 0.080
G23     150.9          47.0               10.9 +/-    1.24      14.3 +/-    1.24  0.090 / 0.300
G27     63.5           34.9               10.3 +/-    0.75      16.4 +/-    0.75  0.100 / 0.290
G28     231.3          23.1               15.1 +/-    1.69      30.7 +/-    1.69  0.090 / 0.290
G30     296.4          31.5               10.0 +/-    1.76      17.0 +/-    1.76  0.110 / 0.260