Mark 5 Disc-Based Gbps VLBI Data System

Details Mark 5 Disc-Based Gbps VLBI Data System Mark 5 Disc-Based Gbps VLBI Data System

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002evn..conf...41w&link_type=abstract

6th European VLBI Network Symposium on New Developments in VLBI Science and Technology, held in Bonn, June 25th-28th 2002, proce

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The Mark 5 system is being developed as the first high-data-rate VLBI data system based on magnetic-disc technology. Incorporating primarily low-cost PC-based components, the Mark 5 system will support data rates up to 1024 Mbps recording/playback to a modular array of 8 inexpensive removable ATA/IDE discs. ATA/IDE discs have already fallen to < 2.00/GB, below the cost of Mark 4/VLBA tape, with the expectation that prices will continue to fall and capacities continuing to expand to several hundred-GB per disc.
Besides recording and playing from disc, the Mark 5 system will be fully e-VLBI compatible, utilizing standard Gigabit Ethernet connections. For real-time e-VLBI usage, data may be either directly transmitted or received; for quasi-real-time usage, e-VLBI data may be buffered through the disc array.
A development effort is now underway at Haystack Observatory, with support from BKG, EVN, KVN, MPI, NASA, NRAO and USNO to fully develop the Mark 5 system. The development plan is highly attentive to compatibility requirements with existing Mark 4 and VLBA data-acquisition and correlator systems, with prototype deployment of ˜20 systems expected in 2002. A fully VSI-compliant Mark 5 system will be introduced in 2003.

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