"Seeing" & "Transperancy" - How to determine, please.
Hi all,
Though I've been at this game for some 30 odd years, as the vast majority of my observing is from my light polluted home sky, I've never really bothered with describing the sky quality in terms of "Seeing" or "Transperancy". Now, as my interests develop further, I'm coming across a lot more with these terms. To make matters more confusing for me, these terms are being noted on differently named scales and with varying scale parameters.
Can someone explain these a little more clearly for me, please?
Which are the more accepted rating methods for these, and how do the various methods work, such as the "Pickering" for seeing, and "NELM" & "TLM" for transperancy?
I'm sure that many other astro-followers could also benifit from this too.
Cheers,
Mental.
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