Yes, "I use the email delivery system for message posts, rather than using a browser and group login. Perhaps THAT method makes a difference." I'm thinking Yahoo has

I don’t think that is what guide software is doing. It assumes a two dimensional object, where each pixel has equivalent weight. I think that what’s really needed is a calculation where the

You would actually use the generic formula for a centroid: https://en.wikipedia.org/wiki/Centroid#By_integral_formula In our case, the characteristic function g(x) is the (normalized) intensity

I second what Peter says here. PHD2 is so widespread in use that it makes great sense to have you guys work with it and figure out the best ways for us to use PHD with AP mounts. Once the weather gets

Would this suggestion regarding shorter guide exposures apply equally to absolute encoders mounts?

Peter and Joel, I hoped there would be a less expensive DIY option, but you guys are right. I am going to buy the length cable I need from Optec. Thanks again, guys! Dave

Thank you Rolando and George for using PHD2. Once you get the hang of it, you will be able to help others since PHD2 and SGP are getting very popular not because of automation but much cheaper than

PHD2 Best Practices are a good place to start. https://openphdguiding.org/phd2-best-practices/ Bryan ---In ap-gto@..., <chris1011@...> wrote : It does indeed go against what I have used and done

It does indeed go against what I have used and done with MaximDL in the past, and what I've recommended. My thinking was that all guiding software was the same, which apparently is not the case. PHD

If you let PHD2 choose the guide star, then you will not get a saturated star, regardless of the exposure. PHD2 selects a star with sufficient SNR, but not saturated. For those of you that are not

I don’t know of any way to calculate an accurate centroid on a saturated star, since you have no actual data on any saturated pixels. I was making an assumption that on a longer exposure, you would

Greg, Thanks for your latest clarification on the currentYahoo problems. Since the delivery lag, or even entire absence of Yahooemail service, seems to be “user, or perhaps ISP

Sorry, I disagree. >>>"Yahoo is running smooth as silk right now." No it's not for some and yes Yahoo mail is working fine for some. My post are still kind of funcky in

That's interesting and I'll be anxious to try it. Rolando

There may be ways of averaging and weighting the guide data so that only drift is compensated and seeing effects are ignored. In Dec especially, drift is only in one direction, so no reason to do lots

PHD2 implements a hysteresis algorithm where you can specify how much the next correction sent relies on the most recent sample versus the history of samples. There are also several

Mike, I got my post sent back to my Live Mail (ISP Rogers.comin Canada) ... in “just 4 minutes” between the time I sent it and the timeI received it back from this Yahoo group page. So,

Rolando, On your second point ... wouldn’t it be nice ifguider programs did a “limit check” and tossed out any centroid which exceeded auser set star position jump size, and only accepted

Mike, It is 11:38 AM here, and I am replying to yourpost using Microsoft Live Mail “directly” as you said. – Lets see how quickly this post pops up on this group’s list strictlyusing

First, long exposures in PHD result in saturated stars which the program apparently can't handle, or can't calculate a proper centroid. Second, it may be stable for a period of time until there is