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Imaging the 20 MHz radio sky
YASI 75 m baseline observations

All data from YASI were obtained by David Brodrick.

This page only links to the plots showing the data. For a more detailed description of the steps required to obtain the data displayed here, please refer to the 37.5 m baseline page.

YASI E-W 75 m baseline, phase=0 setting ("I")

Total power output from both YASI antennas (upper graph) and cross-correlated signals (lower panel), for a 75 m baseline, phase=0 degrees setting (click on image for high-resolution postscript plot).

YASI E-W 75 m baseline, phase=90 setting ("Q")

Total power output from both YASI antennas (upper graph) and cross-correlated signals (lower panel), for a 75 m baseline, phase=90 degrees setting (click on image for high-resolution postscript plot).

By comparison with the figure above (phase=0 degrees) one can see how the fringe pattern of the cross-correlated output is now offset along the x-axis, while the total power output of the individual antennas still looks the same.

YASI E-W 75 m baseline complex visibilities

Below I show the complex interferometer visibilities from the data displayed in the figures above.

Plot of the complex visibilities from the above data. Upper panel: Input cross-correlated signals. Middle panel: phases, bottom panel: amplitudes (click on image for high-resolution postscript plot).