The digital system ARTEMIS for real-time processing of radio transient emissions in the solar corona

Details The digital system ARTEMIS for real-time processing of radio transient emissions in the solar corona The digital system ARTEMIS for real-time processing of radio transient emissions in the solar corona

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..147..359m&link_type=abstract

Solar Physics, Volume 147, Issue 2, pp.359-375

Physics

10

Scientific paper

We present the real-time digital data processing system named ‘ARTEMIS’ that was developed and constructed by the Space Research Department (DESPA) of Paris-Meudon Observatory to digitize, calibrate, format, date, process, compress, and archive in real time signals from multichannel receivers. This system is controlled by a multiprocessor computer based on Motorola MC 68010/68020 processors; it permits the automatic, routine recording of 128 parallel channels at a rate up to 300 samples per second and per channel with a 12-bit accuracy (4096 levels of intensity); it is used to process and record the 120 channels of a multichannel solar radiospectrograph in the frequency range 110 469 MHz; the remaining 8 channels are used for a scanning spectrograph in the frequency range 30 80 MHz and a two-dimensional multicorrelator interferometer at 75.5 MHz. The large quantity of raw data is reduced in real-time from about 1.3 Gbytes to about 40 Mbytes per day by the use of an original algorithm for real-time data compression. It is expected that this new facility will allow us to build a very large data base of digitized and accurately calibrated solar events, in order to achieve statistical measurements over long periods of time.

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