ATrack is used to determine the actual tracking rate. I know this is correct because the drift (RA,DEC) is +/- 0.57 arcsec or less over 60 seconds, typically about +/- 0.2 arcsec. If I then turn off

It will have to do. I was of course assuming that your drift rate of 0.1% was using the raw sidereal rate and not a custom rate in APCC or any other model rate. Or are you saying that the drift rate

By chance we will have a clear night tonight (and near full moon) so I should be able to run the tests. To make sure, I assume you want APCC to not use the pointing model or any tracking corrections

If you are seeing a 0.1% error in your basic Sidereal tracking rate (assuming that you have polar alignment for min drift pointing straight up) then something is definitely wrong and you should make

If the Sidereal rate is 15 arcsec/second then a 60 second image will have a movement of 15 x 60 = 900 arcseconds. If the error is 0.001 then the drift will be 900 x 0.001 = 0.9 arc seconds which is

1100 mount diameter is 175mm, yielding an error of more than 1/2 mm (.022inch) which you will definitely see with the tape lined up.

I'm not sure the test will be accurate enough. If the diameter of the circle the tape is on is say 150mm then the circumference is about 471 mm (c = pi * diam). If the clock error is 0.001 then the

You are asking for confidential information. The sidereal drive rate is the same for you when you are doing the drift measurements as well as for APCC when it is doing the sky modeling. Any error

How does the CP4 determine Sidreal Rate when using encoders? For example, does the CP4 count encoder pulses over a given period of time? Assuming the pulses represent an arc of the mount and knowing

You are heading down a blind alley on this one. Ray Gralack has been doing some development with APCC that may answer your issue. If you really want to check your RA driving rate you can set the rate

Rolando mentioned in a recent posting (#70144) the tracking rate is dependent on the controller clock frequency. Over the years of using my AP1600 with encoders I could never get APCC to provide the

You can't imagine in how many ways my name was already written, especially my surname ;-) Geert Op di 5 mei 2020 om 17:23 schreef Thomas Fischer <manusfisch@...>:

Hello Dick Yes there are a lot of things to consider when getting into (or back into) this hobby. however it can be quite rewarding and mentally stimulating. When you set your equipment priorities,

No worries Geof! Another challenge Dick is facing is his location. Atlin is in the NW corner of British Columbia near the border with Alaska pan handle. This is on the lee side of the coastal mountain

thanks, all of you who responded to my plea. yep, i'm overwhelmed. not just by the tsunami of new issues to think about, but also by everyone's kindness and generosity. one day i hope to

Hi Jerry, The values in the Tracking rate correction are in units sidereal secs/hour (RA) and arc-sec/hour (Dec). These values do not include and offset rates that may have been sent via the ASCOM

Don, Thanks for pointing out my error, I should have read the original post. Yes, a 12" will make the difficulties that I experienced with my 10" Meade all the more challenging, but I believe that it

I looked at his original post. His scope is a 12" Meade. Don Anderson On Tuesday, May 5, 2020, 03:22:20 a.m.

Sorry GERRT, darn autocorrect! -- TJF MOBILE

Gerry, this is a very nice and practical experiment that is very illustrative, thank for the analysis, Tom -- TJF MOBILE