Koehler Urban Astrophotography

Goal:  Patch together collection over 14 total nights (10/2 through 11/20) into a giant mosaic using Astro Pixel Processor.  This all collected from the venerable Orion ST80 with a generic (ebay) dual narrow-band filter, the Canon T3I (astro modded) on the workhorse... Celestron CGEM DX (on franken-tripod). Pre-processing & mosaic creation steps based on the tutorial found here . Started with creation of individual panels composed of the integration of ~100 shots each.  All of these are 180s at ISO1600 with similar weather (temperature) making the selection of darks and bias frames uniform with one master dark and one master bias.   However, camera orientation changes and re-focusing means two sets of flats and flat/darks across these nights (and realistically, perhaps more should have been captured... but with focus being fixed and camera orientation consistent across the two groups of sessions (one with camera in a horizontal orientation when the mount was parked and the second s