<div dir="ltr"><div>Hi Mike, <br></div><div><br></div><div>That hasn't been used for, I'm guessing, around 15 years. If I remember correctly, if switched on then the kurtosis is calculated in mode, accumulated in core, and is then sent out as a BINARY_STA difxmessage (in the same way the short term autocorrelation visibilities were sent out for the V-FASTR project to search for fast transients. STA stands for Short Term Accumulate). I don't *think* that there was ever any infrastructure built to capture those kurtosis arrays and make use of them. (The intent was to ultimately use kurtosis in a calculation to decide to blank certain time windows or replace them with gaussian noise within DiFX itself, so the binary message send was only ever intended as a way to record kurtosis data for offline analysis and testing).</div><div><br></div><div>So if you wanted to make use of this capability, you'd need to create a tool that listened for those BINARY_STA messages from DiFX and saved them to a file. (Or, perhaps easier, you could edit the code in core.cpp to simply write the results out to a local file, and then gather it all up after the correlation instead).</div><div><br></div><div>Cheers,</div><div>Adam <br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, 20 May 2025 at 22:06, 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"><div>Hi DiFX users,<br>Does anyone have any experience with extracting the kurtosis information from DiFX? I see there's a parameter called dumpkurtosis in the source code, but i'm not sure how to set it or where than information gets recorded. </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>Michael S. Dutka</div>
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</blockquote></div><div><br clear="all"></div><br><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>