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APCC model like Mach2
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Ray Gralak
Scott,
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The minimum is two rows of Declination arcs encompassing a target's declination, at least 6 points in each row. More points and more declination arcs near the target's declination will produce higher accuracy. If you are well polar aligned this should only take 5 minutes, maybe less. BTW, APCC is already setup to do declination arcs by default, so it's pretty easy to define a declination arc range. -Ray -----Original Message----- |
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skester@...
Thanks Ray, one more question. By 'hybrid model' I take it APCC needs both a full-sky model, and the Dec Arc model for the given target Dec. In my use case I would need to build the full-sky model each night since I travel to image. I don't really need pointing accuracy since I plate solve to the target. What would be the minimum number of points required in the full-sky model to enable the Dec Arc Tracking functionality?
Thanks, Scott |
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Ray Gralak
Am I correct that this feature is the same functionality Roland used via the keypad on the Mach2 to build a modelThe implementations are independent of each other, but the concept is similar. APCC's Declination Arc Tracking is an idea I first had over 15 years ago. The feature does not use the typical model that you would find in TPoint or other premium mounts. It uses hybrid modeling: pointing correction is handled with a full-sky model, but tracking rate correction is dealt with via a different mathematical model that is optimized for localized tracking accuracy. The tracking rate modeling accounts for mechanical terms that the full-sky pointing model does not and thus produces higher tracking rate accuracy than a full-sky model. -Ray -----Original Message----- |
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skester@...
Am I correct that this feature is the same functionality Roland used via the keypad on the Mach2 to build a model only along the path of the target to be imaged? If so that sounds like a big win for mobile imagers like myself.
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Ray Gralak
Hi Max,
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That feature has been done for over 18 months, having been in successful beta-tests during that time. However, it will be bundled with a few other new features (like support for plate solves using ASTAP) that are still under test and development. I can't give you a specific date yet because progress depends on the weather and other factors. -Ray -----Original Message----- |
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Max Mirot
Ray,
When is the Dec arc tracking model coming out in APCC? I would like trying with my AP1100 Thanks Max Mirot |
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