A Short Blink Sequence for my NGC 6888 Imaging Project скачать в хорошем качестве

A Short Blink Sequence for my NGC 6888 Imaging Project

This is just a short video documenting the blink analysis for my NGC 6888 - The Crescent Nebula Imaging Project. Two video sequences of blinking through Ha and O3 subs are shown here in what is really a tiny part of my project posting that can be seen on Cosgrove's Cosmos: https://cosgrovescosmos.com/projects/... In this blink sequence, you can see the the Ha signal is pretty clean, however the O3 signal often is attenuated by very thin high level clouds. Some of these subs had to be culled, reducing the data set that I had to work with for O3. For those not familiar with a Blink analysis, this is done once I have all of the raw data and I am trying to get a feel for its quality and issues before I jump into the pre-processing phase. The image flips upside and down occasionally due to meridian flips. Again, for those not familiar with a meridian flip - a equatorial mount will track a object across the sky as the Earth turns. One the target get to the zenith, the mount cannot continue as it will run out out tracking space the the telescope/mount can crash into the post/pier/tripod. To avoid this, the scope and the counterweight swap sides on the pier and then the system re-aligns on the target - which now seems to be inverted. This happens several times because this data comes from several nights of capture and we thus have several flips to contend with. During pre-processing, these inversion are corrected during the alignment/registration phase of the processing.