<div dir="ltr">Hi Mike,<div><br></div><div>Can you provide more details as to the amount of slowdown, the number of zoom bands, etc? If you have some example where you get a certain speed without zoom bands, and then you add zoom bands and it slows down significantly, that would be very helpful. Normally I would expect zoom bands to have virtually zero impact on correlation speed, so this is surprising.</div><div><br></div><div>Cheers,</div><div>Adam</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 2 Aug 2023 at 01:38, Michael Dutka via Difx-users <<a href="mailto:difx-users@listmgr.nrao.edu">difx-users@listmgr.nrao.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi DiFX Users,<br>We're having issues with long correlation times for experiments using zoom bands. Since we're still in the process of transitioning to VGOS for geodetic observing we're attempting to correlate data from VGOS stations and Legacy S/X antennas still in order to have good coverage so zoom bands are a must. I was wondering if there were any tricks that people have discovered that would enhance the correlation speed of zoom bands? Do later versions of DiFX (like 2.8.1) handle these better? Or are there some more optimal ways to set up the machines and threads file? <br clear="all"><div>-Mike<br><br></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Dr. Michael S. Dutka</div>
<div>US Navy (civilian)</div>
<div>USNO Phone Number- 202-762-0242</div>
<div>Cell- 301-996-3588</div>
<div> </div></div></div></div></div></div></div>
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</blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr" style="font-size:12.8px"><div dir="ltr" style="font-size:12.8px"><div dir="ltr" style="font-size:12.8px"><div dir="ltr" style="font-size:12.8px"><div dir="ltr" style="font-size:12.8px"><div dir="ltr" style="font-size:12.8px">!=============================================================!<br><div dir="ltr" style="font-size:12.8px">Prof. Adam Deller </div></div><div style="font-size:12.8px">Centre for Astrophysics & Supercomputing </div><div dir="ltr" style="font-size:12.8px">Swinburne University of Technology <br>John St, Hawthorn VIC 3122 Australia</div><div style="font-size:12.8px">phone: +61 3 9214 5307</div><div style="font-size:12.8px">fax: +61 3 9214 8797</div><div style="font-size:12.8px">!=============================================================!</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>