1. N 2 GC for VLBI S.Pogrebenko, JIVE, Dwingeloo, NL, ( pogrebenko@jive.nl )pogrebenko@jive.nl 29.06.2006, Next Generation Correlators Workshop, Groningen, NL Did I say N 2 GC?..

2. VLBI NGC is already there, Just take EVLA, it can do Mk5 global VLBI as a background task, global Mk6 will take just a fraction of its resources And we can consider something a little bit more funny

3. Like this: 4-16 stations, 1-4 Gbps/station VLBI solution (space craft tracking enabled) or baby-SKA beam former or FPA descrambler ( for just under 1 kW thermal ) Single board, 16 CELLs, 16 of 10G fiber connections S. Pogrebenko, 10.08.2005, 04.10.2005 & 12.10.2005, 29.06.2006

4. It’ll just take about 1 Liter/second water flow to absorb 30 kW of thermal power to get some 1-2 Tbps aggregated 16-32 station solution S. Pogrebenko, 10.08.2005, 04.10.2005 & 12.10.2005, 29.06.2006 Using “almost” off the shelf Supercomputer-on-chip solution (IBM CELL is an example), In 5 years of work 2xEVLAs can be squeezed into under 30 kW thermal envelope for about the same design and manufacturing cost as EVLA-1

5. Future is bright! Only Sky is a limit! Image Credit: NASA, ESA, B. Mobasher (Space Telescope Science Institute and the European Space Agency) Only SKA is a limit! Oops… Did I say Sky?

6. There are two thick brick walls on the way to wide field VLBI+SKA First one is N stations square, So thick that even Super-FX can’t break it Second one is even more thicker: When the output data rate exceeds the input one, the Correlator becomes just a waste of CPU power, money and sense and don’t worth a real time of our real life

7. Solution? Shift a gear from van Sittert and Zernike paradigm to Kirchghoff

8. S. Pogrebenko, 30.01.1996, 10.08.2005, 04.10.2005, 12.10.2005, 29.06.2006 And to make it really interesting, let’s talk about scalable N s Log 2 (N s ) paradigm

9. S. Pogrebenko, 30.01.1996, 10.08.2005, 04.10.2005, 12.10.2005, 29.06.2006 What I like about software correlators on advanced HW platforms is an easy shift between processing paradigms

10. What I like even more is that it allows to concentrate on the essence of VLBI, Adding more refined functionality with no other costs but processing time

11. And that allows to do a lot of fancy things