Transfer calibration data between two PC

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Michel Meunier

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Apr 19, 2026, 2:15:02 PM (6 days ago) Apr 19
to Open PHD Guiding
Hello,
I am changing the PC in my remote observatory in Chili. I try to transfer calibration data but I don't know where they are. I have try in Documents, user/appdata/local and in registry without success.
Thanks for your help
Michel

Brian Valente

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Apr 19, 2026, 2:48:35 PM (6 days ago) Apr 19
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Hi Michel

to transfer the profiles, use the export/import profiles from the Connect Equipment:

image.png

To can import the dark library from the profile, 

You will need to recalibrate the guider for the actual XY calibration, it shouldn't take long

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Brian 



Brian Valente

Bruce Waddington

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Apr 19, 2026, 2:49:25 PM (6 days ago) Apr 19
to Open PHD Guiding
From the User Guide:

Equipment Profiles 

At the top of the 'Connect Equipment' dialog are controls for managing equipment profiles.  All of the guider settings in PHD2, default or otherwise, are automatically stored as part of an equipment profile. This includes calibration data and the last three Guiding Assistant reports.  The only significant data not stored in the profiles are the dark libraries and bad-pixel maps which are stored in the file system. Even so, the dark libraries and bad-pixel maps are logically linked to each profile. If you have only one guiding setup - you use the same camera and guide scope combination each time - you will only need one profile.  But you may have multiple equipment configurations - for example, an off-axis-guiding arrangement for a long focal length scope and a separate guide scope/camera configuration for a shorter focal length imaging scope.  The PHD2 guide settings for those configurations will be different, so you should use separate equipment profiles.  The controls at the top of the 'Connect Equipment' dialog let you choose the profile you want to use and to create/edit/remove profiles as you see fit.  When you select a profile and connect to its associated equipment, all of the settings last used with that profile are automatically reloaded.  Once you've established the profiles you need - perhaps only the default one - you can simply click on the 'Connect All' button and you're ready to move ahead.   If you already have a suitable default equipment profile and you simply want to connect to the equipment just as before, you can do a <shift>-click on the main screen 'USB' button and PHD2 will automatically re-connect to your hardware.

Migrating PHD2 Settings to a Different Computer

On Windows, the profile information is kept in the Windows registry, so you can't simply do file transfers to move your settings from one computer to another.  Instead, you should 'export' your profiles into files on the old computer, copy those files to the new one, then 'import' them on the new system.  This will transfer all the settings associated with the profile except for the dark libraries and bad-pixel maps. The dark and bad-pix map data are stored in the file system because of their size. They are located in the 'AppData\Local\PHD2' logical directory used by your operating system.  You will need to transfer that directory and all of its files to the new computer manually without changing the directory location or file names.  That said, the best practice is to simply rebuild them on the new system in order to have data that reflects the current behavior of the guide camera sensor. 

Bruce

Brian Valente

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Apr 19, 2026, 2:51:28 PM (6 days ago) Apr 19
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Bruce was much more thorough :) 

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Michel Meunier

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Apr 19, 2026, 5:33:18 PM (5 days ago) Apr 19
to Open PHD Guiding
Thanks a lot, an automatic session for the next night is started, I will see.
Michel

Michel Meunier

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Apr 20, 2026, 12:34:42 PM (5 days ago) Apr 20
to Open PHD Guiding
Thanks again, the guiding was perfect without a new calibration
Michel

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