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APP 1.075 has been released !

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Console message 'Possible sensor offset issue'  

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(@kevin-lewis)
White Dwarf Customer
Joined: 2 months ago
Posts: 13
September 24, 2019 11:02  

Good morning,

I'm using APP 1.075 beta4 to calibrate and integrate images taken on a Canon 5D MkIV DSLR and see this message during integration.

09:54:18 - 6) INTEGRATE: integrate light frames: wrote frame: 8 to file mapper
09:54:20 - GENERAL IMAGE LOADER: loading frame D:\Temp_workspace\200919 Veil Nebula\Lights\L__21B9042_ISO800_240s__24C.CR2
09:54:20 - 6) INTEGRATE: integrate light frames: loaded frame 9 of 36 frames
09:54:20 - GENERAL IMAGE LOADER: frame D:\Temp_workspace\200919 Veil Nebula\Lights\L__21B9041_ISO800_240s__24C.CR2 was loaded successfully
09:54:21 - 6) INTEGRATE: integrate light frames: LNC: got center coordinates and area of frame 9 in integration composition
09:54:22 - 2) CALIBRATE: Adaptive Data Pedestal: enabled
09:54:22 - 2) CALIBRATE: Adaptive Data Pedestal set at: 9.761E-03
09:54:22 - 2) CALIBRATE: WARNING !!! we have detected a possible sensor offset issue between the MasterBias and the Masterdark !
09:54:22 - 2) CALIBRATE: WARNING !!! the MasterBias has a median value of: 3.125E-02 for channel 1
09:54:22 - 2) CALIBRATE: WARNING !!! the MasterDark has a median value of: 3.112E-02 for channel 1
09:54:22 - 2) CALIBRATE: WARNING !!! normally, the median value of the MasterDark should be the same or larger than the median value of the MasterBias
09:54:22 - 2) CALIBRATE: WARNING !!! because a dark should always contain the entire bias signal plus the dark current and possible amp glow signals
09:54:22 - 2) CALIBRATE: WARNING !!! some CMOS sensors however exhibit this behaviour due to CMOS technology.

Details of the DSLR raw files are:

40 x 240 second Lights, 20 x Flats, 20 x  Darks, 50 x Bias. Everything was shot at iso800 and same sensor temperature

Anything I should be doing different during the calibration or is this message fairly typical?

best regards

Kev

This topic was modified 4 weeks ago 2 times by Kevin Lewis

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(@mariusz)
Brown Dwarf Customer
Joined: 11 months ago
Posts: 6
September 24, 2019 21:42  

Hello.

 

I have the same console message. 

 

MBP, OS Mojave

APP 1.075 beta4

Canon 60d, ISO 800

Lights 17x 360s

Darks 26x 360s

Bias 40x 1/125s

Flats 40x 1/13s

DarkFlats 40x 1/13s

 

What is wrong?

 

Best regards

Mariusz

 

 


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(@vincent-mod)
Galaxy Moderator
Joined: 2 years ago
Posts: 845
September 27, 2019 12:50  

Nothing, it is a warning, however the values are the same or very close to being the same. It shouldn't impact the result.


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(@kevin-lewis)
White Dwarf Customer
Joined: 2 months ago
Posts: 13
September 27, 2019 13:00  
Posted by: @vincent-mod

Nothing, it is a warning, however the values are the same or very close to being the same. It shouldn't impact the result.

Thank you Vincent. I'll continue to ignore it 🙂


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