Anders Misfeldt replied to the topic 'Re:Bias frames - No data/empty?' in the forum. 2 months ago

El Corazon wrote:

Herrhausen wrote: I don't think so. When I look at the results that I get I'm not worried at all.


I don't know....

I think Andy Grove was on to something when he coined the phrase:

"Only the paranoid survive"

Maybe you should be afraid.... VERY afraid....

:-)


;-)

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Anders Misfeldt replied to the topic 'Bias frames - No data/empty?' in the forum. 2 months ago

Hmm, when looking at my Bias frames info in KStars and comparing to yours, all the values are pretty much the same - except Median. Yours shows 0 mine shows 526 point something in the Histogram tab but 0 in the Statistics tab. Should I be worried?

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Anders Misfeldt replied to the topic 'Bias frames - No data/empty?' in the forum. 2 months ago

I don't get this!

Last night I tried turning on my RP4 with everything connected, opened KStars/Ekos and started my "calibration" profile where I only have my ZWO 294MC Pro and QHY5L-II-C cameras enabled. Then I tried a test Bias frame and that worked!? So now I have recorded 100 Bias frames (gain 120 and default gain). No errors in PixInsight anymore.

Could it have been a problem recording the Bias frames with all my gear enabled in Ekos?

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Anders Misfeldt replied to the topic 'Re:Re:Bias frames - No data/empty?' in the forum. 2 months ago

I’ll test with the simulator when I get home. I’ll also try taking bias frames with my guide cam then.

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Anders Misfeldt replied to the topic 'Re:Re:Bias frames - No data/empty?' in the forum. 2 months ago

I’m not home to check the version (but I’ve used the astropi3 script). I’ve so far used two or three different versions for my images since august. Some for Mac and some for the Raspberry Pi 4. They all (all bias frames from August till now) show the same “empty” files, but still with a 23.4 MB filesize.

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Anders Misfeldt replied to the topic 'Re:Bias frames - No data/empty?' in the forum. 2 months ago

@knro, my focal length are written in Ekos, but maybe it's not transfered to the Bias info?

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Anders Misfeldt replied to the topic 'Re:Bias frames - No data/empty?' in the forum. 2 months ago

Wouter, all my Bias frames are produced in Kstars/Ekos and they show up as emtpy in all fits viewers. Values are 0 for min, max, std dev, median etc. Loading the fits files in KStars/Ekos doesn't give me a view as "Herrhausen" produces. My view is just completely white i Kstars (completely black in all other fits viewer programs) even after I've auto-stretched them. So I really don't think the problem is with PixInsight?

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Anders Misfeldt replied to the topic 'Re:Bias frames - No data/empty?' in the forum. 2 months ago

No, but I don’t think that’ll help since Ekos automatically sets the bias exposure time to 3.2E-5 s, no matter what I enter as exposure time.

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Anders Misfeldt replied to the topic 'Re:Bias frames - No data/empty?' in the forum. 2 months ago

Actually, Ekos selects that exposure time for me. I (by accident) sat the time to 3.725 seconds last time, but Ekos just exposed the bias frames as the lowest possible (the 0.00003 s that’s written in the header). The file was named with the 3.725 label though.

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Anders Misfeldt replied to the topic 'Bias frames - No data/empty?' in the forum. 2 months ago

I've tried opening the files in various programs and they all give me an empty file. I just tried in KStars fits viewer which just gives me the same result.

All values are 0!

Light frames, dark frames and flat frames work fine, but bias frames doesn't.

What am I doing wrong?



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Anders Misfeldt created a new topic ' Bias frames - No data/empty?' in the forum. 2 months ago

Hi,
I've been capturing everything with KStars/Ekos by selecting either Bias, Flats, Darks or Lights as my image type. Up until recently I've stacking in DSS but I've just got PixInsight and I want to do everything in here (I'm running Mac). When trying to stack my Bias frames, I get an error telling me that the frames doesn't contain any data and the process fails (PI: Zero or insignificant signal detected (empty image?). I've tried opening a Bias frame in other programs and they indeed look very empty even when fully stretched. So I guess I've produced all my images so far without Bias frames.

What am I doing wrong in Ekos when capturing Bias frames? The header of a Bias frames states the following:

SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                   16 / number of bits per data pixel
NAXIS   =                    2 / number of data axes
NAXIS1  =                 4144 / length of data axis 1
NAXIS2  =                 2822 / length of data axis 2
EXTEND  =                    T / FITS dataset may contain extensions
COMMENT   FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
BZERO   =                32768 / offset data range to that of unsigned short
BSCALE  =                    1 / default scaling factor
INSTRUME= 'ZWO CCD ASI294MC Pro' / CCD Name
TELESCOP= 'EQMod Mount'        / Telescope name
OBSERVER= 'Unknown '           / Observer name
OBJECT  = 'Unknown '           / Object name
EXPTIME =         3.200000E-05 / Total Exposure Time (s)
CCD-TEMP=            -2.52E+01 / CCD Temperature (Celsius)
PIXSIZE1=         4.630000E+00 / Pixel Size 1 (microns)
PIXSIZE2=         4.630000E+00 / Pixel Size 2 (microns)
XBINNING=                    1 / Binning factor in width
YBINNING=                    1 / Binning factor in height
XPIXSZ  =         4.630000E+00 / X binned pixel size in microns
YPIXSZ  =         4.630000E+00 / Y binned pixel size in microns
FRAME   = 'Bias    '           / Frame Type
XBAYROFF=                    0 / X offset of Bayer array
YBAYROFF=                    0 / Y offset of Bayer array
BAYERPAT= 'RGGB    '           / Bayer color pattern
SCALE   =        -9.551690E+02 / arcsecs per pixel
DATE-OBS= '2019-12-02T22:48:43.287' / UTC start date of observation
COMMENT Generated by INDI
GAIN    =                 120. / Gain


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Anders Misfeldt created a new topic ' Auto focuser during Flats, Bias and Darks' in the forum. 3 months ago

Hi,

The other day I finally had a chance to snap M33 for a couple of hours. After my image session I wanted to shot some flats, dark flats and bias frames and then I suddenly became uncertain about the auto focuser, so I disconnected that from Ekos before taking the calibration frames.

So my simple question is:

Is the auto focus module suspended during flats, bias and darks?

Anders

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Anders Misfeldt replied to the topic 'DeepSkyDad AF3 can't connect' in the forum. 3 months ago

I contacted Pavle and it turns out the AF3 needs to have the Baud rate set to 115200 instead of 9600. Changing it to 115200 did the trick :)
Now, get me some nice weather!

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Anders Misfeldt replied to the topic 'DeepSkyDad AF3 can't connect' in the forum. 3 months ago

Did another test without my mount plugged in. I got "serial" errors and a failure to connect the AF3.

What's going on?

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