Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.344..201a&link_type=abstract
In ESA, Solar Physics and Astrophysics at Interferometric Resolution p 201-204 (SEE N93-10901 01-90)
Astronomy and Astrophysics
Astrophysics
Data Processing Equipment, Data Reduction, Fourier Transformation, Imaging Spectrometers, Imaging Techniques, Circuit Boards, Data Compression, Data Systems, Hardware, Signal Processing, Solar Spectrometers
Scientific paper
A laboratory model of a flexible processing and data handling module for the Imaging Fourier Transform Spectrometer (IFTS) is described. The IFTS is one of the instruments under the Solar Interferometeric Mission for Ultrahigh Resolution Imaging Spectroscopy (SIMURIS) mission. The purpose of the data handling module is to do data compression and to select the data to be transmitted for each observation program. The interferogram time-series-out from the optical filter and the IFTS is selected by demodulation and filtered by a set of multirate filters. The bandwidths of the compressed interferograms is close to the optical bandwidths, and they can be transmitted with reduced bit rates. The short Fourier transformation of these bands is left for ground based preprocessing. The data handling module consists of standard 6U VME boards. Each board has a TMS320C30 signal processor and a special purpose input processor. A complete data handling module would consist of between 5 and 10 boards for a 400 by 400 array with 0.05 arcsec pixels. The model consists of two boards, of which one functions as an input data generator.
Andreassen K.
Armbruster P. A.
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