PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-14:57:40
G07     308.0          46.9               12.0 +/-    1.31      15.8 +/-    1.31  0.040 / 0.050
G08     128.8          41.4               14.2 +/-    1.19      20.1 +/-    1.19  0.050 / 0.060
G09     297.3          80.2               14.1 +/-    0.54      14.3 +/-    0.54  0.050 / 0.070
G16     42.3           21.2                9.4 +/-    2.33      20.0 +/-    2.33  0.040 / 0.050
G23     144.4          58.0               14.6 +/-    0.49      16.9 +/-    0.49  0.080 / 0.110
G27     77.1           37.2               10.7 +/-    0.77      16.3 +/-    0.77  0.090 / 0.130
G28     224.9          13.9               13.3 +/-    2.78      33.9 +/-    2.78  0.030 / 0.040
G30     287.2          23.3               13.1 +/-    2.27      26.7 +/-    2.27  0.030 / 0.050