Image motion compensation by area correlation and centroid tracking of solar surface features

Details Image motion compensation by area correlation and centroid tracking of solar surface features Image motion compensation by area correlation and centroid tracking of solar surface features

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8332690n&link_type=abstract

Unknown

Computer Science

Image Motion Compensation, Stabilization, Telescopes, Correlation, Solar Granulation, Sunspots

Scientific paper

An experimental solar correlation tracker was tested and evaluated on a ground-based solar magnetograph. Using sunspots as fixed targets, tracking error signals were derived by which the telescope image was stabilized against wind induced perturbations. Two methods of stabilization were investigated; mechanical stabilization of the image by controlled two-axes motion of an active optical element in the telescope beam, and electronic stabilization by biasing of the electron scan in the recording camera. Both approaches have demonstrated telescope stability of about 0.6 arc sec under random perturbations which can cause the unstabilized image to move up to 120 arc sec at frequencies up to 30 Hz.

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