Researches on the multi-format compatible FX model VLBI correlator system

Details Researches on the multi-format compatible FX model VLBI correlator system Researches on the multi-format compatible FX model VLBI correlator system

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pabei..19..307z&link_type=abstract

Progress in Astronomy, Vol. 19, No. 2, p. 307 - 311 (2001). In: Proceedings for the First National Academic Conference of the Ch

Astronomy and Astrophysics

Astronomy

Vlbi, Correlator

Scientific paper

This paper presents a scheme of modifying the existing two-station Chinese VLBI Network correlator of Shanghai Astronomical Observatory to a multi-format compatible one. In order to process the Mark IV tapes, as well as the VLBA tapes with the data speed up to 1Gbit/s, we must upgrade the high-speed & high-density tape recorders, add one headstack, mount the new precise thin tape reading outfit, and expand the data recovery system and the FFT engines. Adopting the realtime operating system and the FPGAs (Field Programmable Gate Array), the correlator can finish synchronizing the multi-format tapes, decoding, realtime calculating and realize the correlation of the Mark IV, Mark IIIA, VLBA tapes.

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