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I can admit my errors, can you

Absolutely. In fact, you're the only one that gets the point here, apparently. Notice in my previous posts (do a search) that I did not initially claim your position was wrong. THATs why this is so funny. You guys are running on EGO. I said it SEEMED as if the attenuation HAD to be greater than you claimed, but I pointed out that I could be wrong. But some of you guys just HAD to throw your ego into this. THAT's what I'm making fun of there. You can concede points about the atmosphere without destroying your central argument, but your ego won't let you. So, YES, I can be wrong and MAY be wrong in my PERCEPTION about attenuation. I'm just not convinced of your position yet. As for the equation, I'm wondering about the alpha and how we would know what number to use in a 'normal' condition. But I digress.

The linked paper on laser attenuation through fog has numbers for alpha for clear air all the way through to fog.

The alpha they cite is in km units.

As I said earlier, this is easily proven by using their formula in reverse. 0.43dB/km for an alpha of 0.1 as they cite requires the units to be km.