19 June 2021: Our upload server https://upload.astropixelprocessor.com/ has been migrated successfully to our new office with higher upload and download speeds (nearly 10MByte/sec up/down ) ! We now have 1 general upload user called: upload with password: upload. The users upload1 - upload5 have been disabled.
31 May 2021: APP 1.083-beta2 has been released ! APP 1.083 stable will follow soon afterwards. It includes a completely new Star Reducer Tool, New File Saver Module, Improved Comet registration and much more, check the release notes here!
Help with horizontal banding
I'm hoping someone here can shed some light. I used APP to stack 30x300 sec light frames shot with an ASI294mm through an Ha filter and got noticeable horizontal banding. I've re-run the stacking multiple times and have the same result when I run with no calibration frames. Individual light frames look fine - I've gone through all 30 and can see no banding but when I integrate all 30 in APP, the banding is quite noticeable. For simplicity I've ran it with no change to default settings. Can anyone suggest what I might be doing wrong or if there is a setting I should be using?
never mind, think I figured it out. the horizontal banding was an artifact introduced by USB connection. Moved all files to local hard drive in laptop and re-stacked and the issue went away. Cheers!
Great and thanks for sharing that. It happens now and again indeed and has become the usual question to a user when it's super-weird looking or indeed seemingly random interference. 🙂