<font face="Verdana, Arial, Helvetica" size="2">Thomas Krichbaum updated #13162<br />
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DTSIM, still not ok<br />
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<div style="margin-left: 40px;">Ticket ID: 13162</div>
<div style="margin-left: 40px;">URL: <a href="https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/13162">https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/13162</a></div>
<div style="margin-left: 40px;">Name: Thomas Krichbaum</div>
<div style="margin-left: 40px;">Email address: <a href="mailto:tkrichbaum@mpifr-bonn.mpg.de">tkrichbaum@mpifr-bonn.mpg.de</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): -- Unassigned --</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: 13 December 2018 04:54 PM</div>
<div style="margin-left: 40px;">Updated: 13 December 2018 04:54 PM</div>
<div style="margin-left: 40px;">Reply due: 17 December 2018 04:54 PM (4d 0h 0m)</div>
<div style="margin-left: 40px;">Resolution due: 08 September 2021 12:00 AM (999d 7h 6m)</div>
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Dear Eric<br /><br />I am sorry to bother you again, but DTSIM may still have a problem when DTERMS are activated.<br /><br />I simulated a polarized pointsource, and assign only to one station (PT) a set of DTERMS (all other have no D-term).<br />When I plot the phase of Stokes 'Q' or 'U' vs. parallactic angle I see a strong slope of the one station which has a D-term,<br />but not for the others (see plot attached). Also in Difmap I am unable to fit the Q and U phases using the known model fluxes from <br />of Q and U. The total intensity phases are ok, but Q & U not. <br /><br />I am not 100% sure if the reason is an incorrect parallactic angle derotation of something else.<br /><br />I attach one plot and the DTSIM.inp.<br /><br />kind regards, Thomas
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