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PEC Training - PEMPro or Use PHD2?
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Is it worth the extra effort to train my Losmandy GM811G using PEMPro or should I just use PHD2?? I will be using a star near the celestial equator like Lorenzin Zeta AQR.? PEMPro is somewhat complicated to use.? Afterwards I plan to use PHD2 Predictive PEC.
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I will be using my 630mm imaging scope and QHY5L-II auto-guider for training.
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Object Name: Lorenzin Zeta AQR
RA (2000.0): 22h 28m 50.1s
Dec (2000.0): -00¡ã 01' 12" |
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Hi Jim
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if you are imaging, PEMPro is pretty?much the only game.
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PECPro can't program the mount, and i'm not sure how you would use PHD2, but it would be too coarse and noisy. (PS - I assume you mean PECPrep?)
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PEMPro is actually quite easy to use once you understand it, and produces excellent results.?
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Also i would not use bright stars, they can easily oversaturate and confuse the?centroid calculation. Just aim your scope near the intersection?of the celestial equator and meridian and the imaging program will pick a suitable star.?
On Tue, Jun 23, 2020 at 9:58 PM Jim Waters <jimwaters@...> wrote:
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-- Brian?
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Brian Valente
portfolio
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Jim Waters
My Bad - I meant PEMPro.? I corrected the text.? With the Gemini-2 HC you can PEC train the mount.? I would then use PHD2 "Predictive PEC" to Further refine the PEC.
FYI PHD2 Predictive PEC Guide Algorithm (PPEC) ?Overview ?The PPEC algorithm is different from the others in PHD2 because of its modeling and predictive capabilities.??The algorithm analyzes the tracking performance of the mount in real-time and once that analysis is complete, it will compute guiding corrections even before a repetitive error is actually seen.??Issuing proactive guiding corrections reduces the time delay inherent in traditional guiding and can significantly improve performance.??With the other algorithms, which are completely reactive, guide corrections are issued only after the error has been seen on the camera sensor.?? ?Once guiding has begun, the algorithm analyzes the performance of the mount and looks for tracking errors that are repetitive and thus, predictable.??The algorithm employs a sophisticated Gaussian process model developed by a research team at the Max Planck Institute in?Germany.??The mathematical details can be found in a paper referenced here: ? |
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Hi Jim Yes PEMPro >>>With the Gemini-2 HC you can PEC train the mount.? as I mentioned before, you really don't want to go this route for imaging. On Tue, Jun 23, 2020 at 10:37 PM Jim Waters <jimwaters@...> wrote: My Bad - I meant PEMPro.? I corrected the text.? With the Gemini-2 HC you can PEC train the mount.? I would then use PHD2 "Predictive PEC" to Further refine the PEC. --
Brian? Brian Valente portfolio |