Hi Andy,
No worries, an assumption on my part that the meaning was understood. This is the start if the process, Then the supressing lines etc etc etc.
It is interesting you say you crop the dodgy stuff, that’s part of the problem with meteors. If you want to get a real feel for what’s going on you can’t! I suppose thats the premise of much of the discussion here.
Maybe I missed it but what software do you use? One of my fellow meteor spectroscopists from Switzerland has been doing some really interetsing stuff with the ISIS package, also by Christian Buil, and orthographic corrections to properly linearise (is that a word?) meteor spectra. I am hoping, if nothing else, that a few people will set up a camera with a grating and stick it out for a year.
If half a dozen people do that then at one fell swoop we’ll have more spectra that at any time in the past. I got 105 meteor spectra in 714 hours of observing and I live in probably the cloudiest and wettest part of the UK. That was two cameras and occasionally a third during showers.
The EDMOND database which I believe both Nemetode and UKMON contribute to, now has 3 MILLION light curves (not orbits as I intially thought). The number of spectra from all the amatuers (Basically me so far in the uk on an ongoing basis as far as I can tell!) and several professional projects across Europe might have produced a few hundred or a thousand spectra. To do any decent statistical work, of course, more would be nice!
I hope you’ll maybe have a go. Any prior experience with spectroscopy makes it even easier and there are programs like RSpec which are quite user friendly. Some of the basic geometric transformations needed are available as little slider bars.
Its easy(ish) 😉 all one needs is a little patience.
Cheers,
Bill.