Search found 12 matches

by jeff2011
Thu Nov 18, 2021 5:51 am
Forum: Live Stacking
Topic: Is there a way to filter out frames with tracking errors
Replies: 8
Views: 1615

Re: Is there a way to filter out frames with tracking errors

Thanks for taking your time to look into this Robin.
by jeff2011
Tue Nov 16, 2021 12:01 am
Forum: Live Stacking
Topic: Is there a way to filter out frames with tracking errors
Replies: 8
Views: 1615

Re: Is there a way to filter out frames with tracking errors

Sorry it took so long Robin. Below is a link to an example. The focus is poor but it illustrates the problem. For the frames with bad tracking it will calculate a FWHM smaller than the other frames and will stack that bad ones that it finds enough stars. To live stack you will need to increase digit...
by jeff2011
Tue Oct 19, 2021 2:09 am
Forum: Live Stacking
Topic: Is there a way to filter out frames with tracking errors
Replies: 8
Views: 1615

Re: Is there a way to filter out frames with tracking errors

Thanks Robin that would be a useful feature. We save our frames for replay at outreach on cloudy nights. I am sure we have some saved with streaking stars. I will gather some sample frames and get them to you next time I am out at my club's observatory.
by jeff2011
Sun Oct 17, 2021 9:47 pm
Forum: Live Stacking
Topic: Is there a way to filter out frames with tracking errors
Replies: 8
Views: 1615

Is there a way to filter out frames with tracking errors

Our club is doing EAA on an old Equatorial fork mount that holds a large 18 inch newt. It does well for the most part but occasionally has a tracking glitch that results in a frame with streaked stars. The FWHM filter does not filter these out as the stars prior to the glitch are bright enough to al...
by jeff2011
Thu Mar 18, 2021 2:37 pm
Forum: General Discussions
Topic: Question about our Club's Pro license
Replies: 1
Views: 458

Question about our Club's Pro license

Hello Robin, My astronomy club recently purchased the Pro license for use in our club's observatory. We do viewings for the public and have been closed since COVID started but plan to reopen using EAA instead of viewing through the eyepiece. Your license FAQ states that the license can be "inst...
by jeff2011
Thu May 21, 2020 3:23 am
Forum: Tips and Tricks
Topic: Flats and mottling pattern in final stacked image
Replies: 10
Views: 7678

Re: Flats and mottling pattern in final stacked image

I believe it is an inherent issue with that sensor Robin. It was designed as a low light sensor and does not react well to the bright light of flats with short exposures. Lots of issues reported on Cloudy Nights taking flats with that sensor, both the QHY and ZWO models. ZWO markets it more as an EA...
by jeff2011
Wed May 20, 2020 6:17 pm
Forum: Tips and Tricks
Topic: Flats and mottling pattern in final stacked image
Replies: 10
Views: 7678

Re: Flats and mottling pattern in final stacked image

I was running into this issue and a friend pointed me to this thread. 200 gain flats look promising but I still noticed a bit of mottling in the flat. I have also found that longer flat exposures also seem to reduce mottling. A 200 gain flat at 2 seconds looks indistinguishable from a zero gain flat...
by jeff2011
Sun Mar 24, 2019 3:26 am
Forum: ZWO Cameras
Topic: Sensor Analysis ASI294c, e/ADU does not look right
Replies: 5
Views: 2882

Re: Sensor Analysis ASI294c, e/ADU does not look right

Yeah that was it. Had some trouble running the sensor analysis. I had to run it with my flat panel at full brightness even though it said it was dangerously close to the minimum exposure, but if I dimmed it seemed to get in an infinite loop when doing the last run of the analysis where I have to put...
by jeff2011
Sat Mar 23, 2019 4:10 pm
Forum: ZWO Cameras
Topic: Sensor Analysis ASI294c, e/ADU does not look right
Replies: 5
Views: 2882

Re: Sensor Analysis ASI294c, e/ADU does not look right

I will give that a try. After posting I realized there was a new version and was headed in that direction. Thanks for your explanation.

Jeff
by jeff2011
Sat Mar 23, 2019 4:41 am
Forum: ZWO Cameras
Topic: Sensor Analysis ASI294c, e/ADU does not look right
Replies: 5
Views: 2882

Sensor Analysis ASI294c, e/ADU does not look right

I ran a sensor analysis on my ASI294c and got the following results. The read noise, full well and dynamic range match up reasonably well with the charts on the ZWO site for this camera but the e/ADU does not. I am reading something wrong. Unity gain should be at 117. I am running version 3.1.5220.0...