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Not Able to Understand Meridian Delay between APCC and Sequence Generator Pro
binkersnot@...
Greetings!
I am confused about how to set the Meridian Delay in APCC in tandem with Sequence Generator Pro. I see in the latest version of APCC on the Meridian tab that there is a "Send Limit to SGPro" checkbox. I have turned this on and then made changes to the Meridian Delay. The results seem to be doing the opposite of what I expect. I'd appreciate clarification on how to set the Meridian Delay from APCC to be recognized and used by SGP. Here's an example of what I am seeing: At present my scope is pointed at Deneb, which is E of the meridian. There is no Meridian Delay (0) in APCC. SGP reports that it will do a meridian flip in 3 hr 15 min when Deneb reaches the Meridian. When I set the APCC Meridian Delay to +1.00 hr, I expect the meridian flip to occur an hour earlier. Indeed the yellow line in the Telescope Position diagram in APCC shows it is shifted 1 hr E, and any slews I make between that line and the meridian will be CW up as desired. However, I note that SGP now reports the time until flip is an hour later at 4 hr 15 min. This seems backwards to me. Do I have this right? I just attempted to set the delay to one hour later (now shifted W), and SGP still adds an hour to the flip, whether I set the Meridian to + or -1 hr. Thanks for your help with this. Best Regards, Ben
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Hi Ben,
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I think that SGP only supports pushing the Meridian flip point later, which is a negative value in APCC/Driver. You would have to ask the SGPro folks why the displayed value in SGPro shows as it does. -Ray Gralak Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc Author of PEMPro: http://www.ccdware.com Author of Astro-Physics V2 ASCOM Driver: http://www.gralak.com/apdriver Author of PulseGuide: http://www.pulseguide.com Author of Sigma: http://www.gralak.com/sigma
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binkersnot@...
Ray:
Thanks for the clarification. I will ask the SGP about this. I do know from practice that I can start an acquisition with scope on the E side with CW up. I set the Meridian Delay in APCC, and then when the slew command comes from SGP, APCC orients the scope accordingly, and a meridian flip does not need to occur. But as I said before, I can't get this to work for an early meridian flip, and your explanation confirms that. Thanks again. Best Regards, Ben
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