This wiki page is a guide to use the Differential Image Motion Sensor Using Multiapertures (DIMSUM) instrumentation that was installed to Aux Tel between December 6th and 16th. I am currently writing this as a wiki page to be able to get feedback during the process of documentation. Once everything is finalized I can create a pdf file if requested.
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The SMA threads are 1/4-36. Digikey sells them, part number A104989-ND. Bought 100 of them.
Asked Helen to place this order since credit card failed.
Feb 14 2024 Pachon, Stubbs
Changed optical fiber configuration to have Xenon source feed attenuator module to 600- micron 1:4 fiber then 4 of 200 micron 1:4 bundles. This gives us 16 sources 200 microns in diameter.
I did find one fiber that was flopping/loose in the pegboard, that was presumably the one that showed anomalous behavior in analysis done Feb 2024 by Ali K.
Checked using headlamp that all fibers look comparable.
When running remotely on data collection using gphoto-2 to interrogate aperture worked fine, after power cycling the camera.
But the
./CommunicateTrial.sh
script failed.
Tried a number of things- disk was not full, camera power cycle. Eventually realized SD card in camera was full. We (Elana was consulting via Zoom) used EOS camera utility on mac computer to reformat the SD card.
Used EOS tool on mac mini to center up the image and adjust fiber positions to get all 16 in FOV. Used dcraw to dump image metadata.
Filename: CU2A5938.CR2
Timestamp: Wed Feb 14 21:18:31 2024
Camera: Canon EOS 5D Mark IV
ISO speed: 100
Shutter: 1/197.4 sec
Aperture: f/5.0
Focal length: 271.0 mm
Embedded ICC profile: no
Number of raw images: 1
Thumb size: 6720 x 4480
Full size: 6880 x 4544
Image size: 6744 x 4502
Output size: 6744 x 4502
Raw colors: 3
Filter pattern: RG/GB
Daylight multipliers: 2.074708 0.932504 1.176114
Camera multipliers: 2040.000000 1024.000000 1456.000000 1024.000000
When I walked up to camera, focal length was set to 100mm and I have no idea how that happened.
Current issue is that the flash is failing to trigger. Here is the manual for it:
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