han.k

Flipped means e.g north is up and east is on the right for the data in the file. It is important for the astrometic solution to know. For a flipped image, if north is up, you only have to flip horizontal to get the image "correctly". Flipping is caused by your telescope. The image is then upside down or left and right are swapped. Not both because that is like a rotation. cs, Han

Hi Mark, Yes see. It happens if the view is flipped. If you uncheck the View under main menu View it should be correct. So if the the image is saved, north will be up. If it is flipped (indicated with a F at the north arrow), east will be on the right side. cs, Han

Put the file is in your home directory. If you have the files in your home directory, you no longer need the .zst file and can delete it. You just need the astap executable and the star database files like the D50 or D80,. in one folder anywhere.

It doesn't matter for me. Probably the direct link works better for most users. I have a download counter, so I see when it is downloaded. Repository. Is the /opt/astap overwritten when there is an update? I doubt it. I do not expect major updates for the solver part. For MW4, the current version should fine for some years. Han

'v2026.03.25'

You can put the ATAP files anywhere. As long the astap executable and star database filess are in one directory. So you put them in your home directory somwhere in a subdirectory. Moving the files around is not problem. cs, Han

Hi Jim, Managed to compile for aarch64, GTK3 on my RPI4. Put the executable in the packges. Not tested but should work. cs, Han

'v2026.03.24'