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BlockHead
About
- Username
- BlockHead
- Joined
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Comments
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Hi John, A couple of things. The directory button is, as you know, loading the files based on what is in the Fits Headers. I just wanted to say that I do not see a strong correlation between this and blinking through light frames. Furthermore, I wo…
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Hi Frank, 1. If you do not DITHER (not drizzle .. .lol), you have to use the first method (with either interpolation or missing value). You will be creating a repair map to use on your Light Frames. 2. On the second method do you apply the repair ma…
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It does... I think I have a section on that. You can use the math compiler to take care of it. Please see this section: https://www.adamblockstudios.com/articles/CCDStack_Techniques_01 -the Blockhead
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I agree- you need significant signal in the bands you want to control. In addition, although fainter- sometimes the SII and HII map to exactly the same structures and features- so there isn't much "new" information or wayt o contrast the colors and …
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I privately suggested to Roberto (the developer) that in the case of PSF Scale SNR- the "bad frames" line item in the execution monitor needs to show after each instance of ImageIntegration. I think this make sense.-the Blockhead
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Wow... John is thorough! I did not look in the documentation...just went with my understanding of how WBPP works. Great to confirm!-the Blockhead
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Hi Roger, This section is derived from one of my Horizons workflow videos. So I changed its permissions and pointed at it from the Fundamentals library/sections. I could make a copy of this page so it looks like it is not in Horizons... but it is o…
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I could be wrong... but I believe the measurements (noise, PSF fits/photometry...etc) are all made after calibration. Checking Subframe Weighting just determines how to use these measurements to calculate a specific weighting scheme. -the Blockhead…
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Thanks Sedat. Hopefully I covered what was necessary and did not make too many errors. (@johnmurphy)-the Blockhead
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Your spikes are solid colors.This means you took filtered data at different times... AND that the rotation of the field was different. The camera moved. When you align the images... the star spikes will indeed be rotated and not match. -the Blockhead
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Hi Richard, You are getting these messages, I believe, because you are measuring data taken with the version of PI that did not insert these numbers into the FITs headers. This will be true for all "old" data taken before roughly May of 2022. In ord…
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I need to do an update video on NSG...-the Blockhead
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So I saw the .symbols is the answer. Very cool.Thanks for posting to the official forum (and getting an answer from Juan).-adam
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Very nicely done!I am not certain what you mean by the image constants... do you mean initial calculations of the constants are run for every pixel? Honestly I do not know how the pixel math expressions are compiled. I wonder if expressions that do …
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Hi Paul, Hopefully I am consistent... and I will assume so for the moment (can't look back at everything). Here are some comments: 1. My implication about hot pixels is that many novice imagers believe that a bad frame is determined by the number of…
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You should make available the reference frame and some of the files that fail to align.These are the calibrated and cosmetically corrected data. Of course, these are the output of WBPP... *.XISF-the Blockhead
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You should show some images or make them available. Typically it is an image "quality" issue.-the Blockhead
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Yes...I forgot to add that to the video...Thank you Mike.-the Blockhead
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Yes, of course. This is mostly what I demonstrate. You will find those videos in the Workflow sections. https://www.adamblockstudios.com/categories/Fundamental_Workflow -the Blockhead
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It is true, I do not think you need the EDR3 Files any longer. The DR3 is complete as far as I know. Only a new survey would be released, not an update to DR3 with similar files. You would not know about updates/new surveys unless the developers (J…