Correlation tracker system for space solar telescope

Details Correlation tracker system for space solar telescope Correlation tracker system for space solar telescope

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4839..307j&link_type=abstract

Adaptive Optical System Technologies II. Edited by Wizinowich, Peter L.; Bonaccini, Domenico. Proceedings of the SPIE, Volume 4

Astronomy and Astrophysics

Astronomy

Scientific paper

A prototype of correlation tracker (CT) designed for the Space Solar Telescope (SST) has been realized in National Astronomical Observatories of CAS. We designed a special optical system for the development and test of the CT system. We estimate the image motion by cross-correlation method via FFT and take full advantage of the real-valued FFT to reduce the amount of calculation. For a possible realization of the processing unit used in space, we use a "1 bit correlation" method, which will greatly simplify the hardware implementation of FFT. A resolution of 0.01" has been obtained corresponding to the object space of the telescope, with the -3dB closed-loop error cutoff frequency of 38Hz along x axis and 40Hz along y-axis achieved.

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