On Mon, Aug 19, 2024 at 11:08 AM, Oberon510 wrote:
I just redid my PEC training of my G11G mount with PemPro last night and got some odd results. I am not sure what to make of the results so hoping one of the Group could have a look at the attached logs and venture an opinion.
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The night sky was very clear and I had no issues with the mount (snags etc) that I know of.
Hi Ken,
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As Daniel said, the 76 sec error is large before PEC and it's not something that can be corrected by PEC. You may need to adjust the RA worm block better to reduce this error. If you can't reduce it much, you can still try to correct for it if you use PHD2 by enabling PPEC with the worm cycle configured for 76sec. PPEC used together with PEMPro-programmed Gemini PEC 1x worm cycle corrections may help reduce PE even further.
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This is your PEC=OFF file analysis:
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The DEC error appears to be about 2.5 arcsecs peak-to-peak, so seeing wasn't very steady. I also see random direction drift in DEC between worm cycles, sometimes it even changes direction between cycles. If the mount was not guiding, there should not be change in the direction of DEC drift every 4 minutes or more. Likely an indication of unsteady seeing, but also possible flexure or sag in the imaging train.
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Regards,
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? -Paul
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Paul Kanevsky