Re: Guide star lost after dithering


yanzhe liu
 

Yes, exposure time was 900s.


On Tue, Nov 23, 2021 at 6:25 PM Brian Valente <bvalente@...> wrote:
Are you doing 15 minute exposures?

The dither distances and settling look fine from a PHD perspective, although I can see a big spike in guidestar SNR roughly every 900 seconds

On Tue, Nov 23, 2021 at 5:49 PM yanzhe liu <liuyanzhe@...> wrote:
Here is the log:

https://openphdguiding.org/logs/dl/PHD2_logs_xGZF.zip

I have not used the log before but I think this is the dither causing issue. I then restarted the sequence by turning dither off.

19:29:39.383 00.003 2112 PhdController::Dither begins
19:29:39.386 00.003 2112 dither: size=1.00, dRA=-0.61 dDec=0.00
19:29:39.389 00.003 2112 MountToCamera -- mountTheta (3.14) + m_xAngle (-1.59) = xAngle (1.55 = 1.55)
19:29:39.392 00.003 2112 MountToCamera -- mountX=-0.61 mountY=0.00 hyp=0.61 mountTheta=3.14 cameraX=0.01, cameraY=0.61 cameraTheta=1.55
19:29:39.395 00.003 2112 setting lock position to (121.19, 18.76)
19:29:39.398 00.003 2112 Mount: notify guiding dithered (0.0, 0.6)
19:29:39.401 00.003 2112 MultiStar: stabilizing after lock position change
19:29:39.403 00.002 2112 Status Line: Dither by -0.61,0.00



--
BrianĀ 



Brian Valente

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