https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/PIPE2D-443 DRP 2-D Pipeline <p>Observe the attached image ``Comparison_data_simulations.png''.</p> <p>Top left: Cutout from real data (19358r1), bright spot at position x=63, y=151, i.e., bottom left part of the detector.<br/> Top right: Cutout from the simulated image (31r), taken at positions x=74, y=233, i.e., also the bottom left part of the detector.</p> <p>Bottom left: Cutout from real data (19358r1), taken at positions x=4012, y=153, i.e., bottom right part of the detector.<br/> Bottom right: Cutout from the simulated image (31r), taken at positions x=4024, y=233, i.e., also the bottom right part of the detector.</p> <p>See the obvious differences in the shape of the PSF between the simulated and real images at the (basically) same position of the detector. </p> <p>I will investigate if this is actually concerning. Asking Jim will be the first step. </p> PIPE2D-443

Deduce if the difference between the simulated and observed data is indicative of a problem

Task Normal Done Done ncaplar ncaplar Tue, 23 Jul 2019 15:41:40 +0000 Tue, 29 Oct 2019 13:13:26 +0000 Tue, 15 Oct 2019 18:55:20 +0000 0 1 <p>Sent an email to Jim on Jul 23.</p> <p>Jim asked me to check if the simulations agree with Zemax. Especially when looking at the picture taken from the lower part of the detector, I think it is safe to say that simulated and Zemax data agree with each other, while not agreeing with the real data. </p> <p>One possible explanation is that maybe the instrument has a slightly different focus than expected. For example, </p> <p><span class="image-wrap" style=""><a id="12104_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/12104/12104_Fine_defocus_example.png" title="Fine_defocus_example.png" file-preview-type="image" file-preview-id="12104" file-preview-title="Fine_defocus_example.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/12104/_thumb_12104.png" style="border: 0px solid black" /></a></span> </p> <p>shows the shape of the PSF when we slowly change defocus. The orientation of the spot will change depending on the defocus value and perhaps we are just in a bit different regime than what Jim and Zemax expected?</p> <p>I suggest closing this ticket, and running with the explanation proposed above, i.e., that the actual instrument a bit different focus regime than expected.</p> Relates PIPE2D-446 PIPE2D-421 Development Rank 0|02qpt6:508yl0chzzy0000q Reviewers hassan Sprint 2DDRP-2019 F 2DDRP-2019 I Story Points 2.0