PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-21:57:40
G07     314.0          49.7               11.6 +/-    1.37      14.6 +/-    1.37  0.130 / 0.280
G08     123.5          45.0               14.1 +/-    1.54      19.0 +/-    1.54  0.120 / 0.270
G09     273.3          82.1               12.9 +/-    1.78      13.0 +/-    1.78  0.050 / 0.080
G16     42.9           19.4                9.7 +/-    1.66      21.6 +/-    1.66  0.050 / 0.080
G23     148.5          55.3               11.3 +/-    1.24      13.5 +/-    1.24  0.150 / 0.550
G27     69.9           36.3                9.6 +/-    1.72      14.9 +/-    1.72  0.150 / 0.440
G28     227.8          18.7                9.7 +/-    5.11      22.1 +/-    5.11  0.040 / 0.070
G30     292.9          29.7               11.0 +/-    1.49      19.4 +/-    1.49  0.040 / 0.070