Re: Guide star lost after dithering
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A dither move is normally the same as a guide move command, except typically bigger. If the mount guides normally and properly, then it is responding to the PHD external commands in the proper manner. I don't see how the mount would, on its own, move the Dec axis by 12 pixels unless instructed to do so.
If the camera is angled by 45 degrees then both X and Y will move although only RA is commanded to move. We don't have enough information at this point as to what really moved. Did the Dec actually move or did the Y axis of the camera move? The two are not the same. People often mix up the X and Y axes, thinking they are the RA and Dec axes. This is not the case unless the camera is exactly rotated to a null position with respect to RA and Dec. That is usually never the case.
From: Brian Valente <bvalente@...>
Sent: Tue, Nov 23, 2021 8:30 pm
Subject: Re: [ap-gto] Guide star lost after dithering
Regarding your image download when exposure complete, are you still guiding while image is downloading? Does download take a while?
On Tue, Nov 23, 2021 at 6:28 PM yanzhe liu <liuyanzhe@...> wrote: