If an observer sees an NLC overhead how far away will that cloud be seen ?
I realise that if observer1 sees some NLC then that is fair warning that conditions are right that observer2 may also see some NLC, but I bolded the above so that you could help me with the maths - range of a specific cloud case?
Thanks Bill, thats great reply, gives me a feel for reports from Cumberland wrt me, and for any of my reports ( I live in hope lol!) for Chris down in Torbay
Noted on reasonable range/elevation.
Would be interested to see your graphic if it ever emerges from the archive, I have been working back thro', not seen it, saw some posts by Markt ( I think it was '09) about a UK north pointing NLCwebcam but not seen a followup
that is a prob with blogs and fora, so much gets buried in the mists of time compared with structured websites dont get me started
Hi, If you look back to page 3 (this section), third posting from the top, "Range guide", that has the graphic. The server I use was offline over the weekend, that may be why you couldn't find it. Cheers, Bill.
Thanks Bill I see it now, very interesting. I will have to think a bit about how to convert those slant ranges into the case I was thinking about ie. observer to observer distance, iow. sub-NLC point to me. I now realise that I asked my orig. question rather imprecisely, when I said "If an observer sees an NLC overhead how far away will that cloud be seen ?" I meant how far away from that observer will that cloud be seen, the ground range.
Meanwhile I'll take your 600k as a working practical case.
Also now that the matter of great circles passing thro' two observers but not thro' the pole is introduced, , I'm off to scratch the gray matter well it's cloudy out there so a little thinking will not go amiss to while away the hours