Re: Mach2 and APCC last night
Ray Gralak
I am surprised to see the tracking you report as being .5 arc Sec. 35° above the Southern Horizon and .8Periodic error is completely corrected by the encoders but there are other sources of tracking error that must be minimized. The level of tracking error will depend on the amount of uncorrected drift from polar alignment error, refraction, equipment flexure, tube currents, etc. Even with a good pointing model tracking quality is of course still dependent on the quality of local seeing and guiding algorithms. -Ray Gralak Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro Author of PEMPro V3: https://www.ccdware.com Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver -----Original Message-----
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