<div dir="ltr">Hi Eskil,<div><br></div><div>Whenever I've needed to do something like this (massive clock search) in the past I've avoided converting to fits or mark4 and just searched for fringes in the raw difx files directly. There is a program utilities/vis2screen/fringeFindDiFX.py that just does a simple FFT based search on individual integrations, if you've got the S/N for that. Otherwise, a shell script with a loop is likely to be your friend. Others might have different shortcuts they've developed though.</div><div><br></div><div>Cheers,</div><div>Adam</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 28 Nov 2020 at 10:29, Eskil Varenius 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">Dear DiFX users,<br>
<br>
I find myself wanting to explore a huge (1 second) space of possible <br>
clock offsets. Testing with spectral resolution 0.01 works fine, but <br>
only covers roughly +-50us. Trying the next power of 10, DiFX 2.6.2 runs <br>
but difx2mark4 fails, reporting<br>
<br>
"fatal error: # visibilities (32000) exceeds array dimension (8192)"<br>
<br>
Does anyone have a working method for how to clock-search the full <br>
1-second space?<br>
(Shifting the clock_early values in VEX/v2d by 100us and stepping <br>
through using 0.01 resolution should work, but there must be a more <br>
elegant way?)<br>
<br>
Kind regards<br>
<br>
Eskil<br>
<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><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">!=============================================================!<br><div dir="ltr" style="font-size:12.8px">A/Prof. Adam Deller </div><div dir="ltr" style="font-size:12.8px">ARC Future Fellow</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"><br></div><div style="font-size:12.8px">office days (usually): Mon-Thu<br>!=============================================================!</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>