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/INSTRM-1397 Instrument control development <p>During the Sept 2021 Engineering Run, the SpS was used to determine how well a cobra can be positioned behind a blackspot given that the MCS CANON camera was not sensitive enough. Please find ways to improve the read time, for example special exposures where the data are windowed and binned (as the flux is the main output needed from the SpS).</p> INSTRM-1397

Fast SpS reads for cobra moves behind blackspots

Task Normal Done Done cloomis hassan EngRun SPS Mon, 11 Oct 2021 17:33:35 +0000 Fri, 19 Nov 2021 07:54:49 +0000 Fri, 19 Nov 2021 07:54:49 +0000 0 4 <p>I propose reading out the middle couple hundred rows. The wipe for a full frame takes ~7-8s, so this should take ~5s without much effort (i.e. without making a faster wipe). </p> <p>If we trust the detector map, we could use the first few rows and skip the wipe. So in practice I'd implement this as <tt>read window=row0,row1</tt> and wipe up to row0.</p> <p>Added <tt>row0=N nrows=M</tt> to <tt>ccd read</tt> command. This extends the existing <tt>nrows=</tt> logic, which has always simply read out some rows, without caring about image file format. But if both are specified, a full size image is generated, with the band of rows placed appropriately and the rest left at 0.</p> <p>For the wipe, requesting <tt>nrows=0</tt> makes the <tt>exposureState=</tt> keywords get spit out correctly and the puts the detector voltages in the integration mode, but no clocking is done. This also extends existing engineering functionality.</p> <p>When reading a band of rows, <tt>W_CDROW0</tt> and <tt>W_CDROWN</tt> are added to the PHDU.</p> <p>Still slower than I want, but most of the easy time has been picked out. Umm, for row0=1800 and nrows=400, 11s.</p> <p>Need to confirm that the data look good, but am waiting on a lamp replacement for that.</p> <p>Implemented as discussed. Could still make it a bit faster but there is no tall pole.</p> Blocks INSTRM-1414 PIPE2D-914 Relates INSTRM-1385 INSTRM-1439 Development Rank 0|zzs2x3: Sprint PreEngRun4 EngRun3Cleanup Story Points 2.0