<font face="Verdana, Arial, Helvetica" size="2">Eric Greisen updated #14061<br />
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<div style="margin-left: 40px;">Staff (Owner): Eric Greisen (was: -- Unassigned --)</div>
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PCAL with SPECTRAL=1<br />
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<div style="margin-left: 40px;">Ticket ID: 14061</div>
<div style="margin-left: 40px;">URL: <a href="https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/14061">https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/14061</a></div>
<div style="margin-left: 40px;">Name: Lynn Matthews</div>
<div style="margin-left: 40px;">Email address: <a href="mailto:lmatthew@haystack.mit.edu">lmatthew@haystack.mit.edu</a></div>
<div style="margin-left: 40px;">Creator: User</div>
<div style="margin-left: 40px;">Department: AIPS Data Reduction</div>
<div style="margin-left: 40px;">Staff (Owner): Eric Greisen</div>
<div style="margin-left: 40px;">Type: Issue</div>
<div style="margin-left: 40px;">Status: Open</div>
<div style="margin-left: 40px;">Priority: Default</div>
<div style="margin-left: 40px;">SLA: NRAO E2E</div>
<div style="margin-left: 40px;">Template group: Default</div>
<div style="margin-left: 40px;">Created: 17 June 2019 11:16 AM</div>
<div style="margin-left: 40px;">Updated: 17 June 2019 03:49 PM</div>
<div style="margin-left: 40px;">Reply due: 19 June 2019 11:16 AM (1d 19h 26m)</div>
<div style="margin-left: 40px;">Resolution due: 12 March 2022 05:00 PM (999d 1h 10m)</div>
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I agree that the jumps look rather odd. I think the task extends the answer at the edge channel of ICHANSEL<br />all the way to the edge. It might be instructive to set ICHANSEL to include all channels as a test.<br /><br />I also doubt that the high frequency ripples are real - the coherence is probably added by SMOOTH and INTPARM.<br />Do be aware that SMOOTH and any bandpass corr interact. The question is what SMOOTH was done in BPASS.<br />You then have to stay with that value if any, or have SMOOTH applied after the bandpass (different SMOOTH(1)).<br /><br />INTPARM was to do even more smoothing after that mess, but is certainly similar to SMOOTH if applied after the<br />bandpass. I wonder if you should not simply use the "continuum" solution for a narrow band observation.<br /><br />Cheers<br /><br />Eric
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