LeeE wrote: > On Monday 11 February 2008 13:59, Melchior FRANZ wrote: > >> * Thomas Förster -- Monday 11 February 2008: >> >>> At least I think conservative is the right term. >>> >> Oh, I didn't think that it was wrongly used. It's just that >> the decision was meant to be reasonable for the 9999 case >> based on logical considerations, and not the least on whether >> it would be (seen as) conservative. And I found the fact that >> a clear rendering bug is blamed on METAR or a "conservative" >> decision there annoying. >> >> But I like the idea to make an educated guess based on >> other METAR values, and I plan to implement that later >> today. I'll use a large set of stored METAR messages with >> specified (i.e. non-9999 or M*) visibility to see which >> elements (other than humidity) have a correlation with the >> visibility. BTW: the biggest numbers that I found were >> 110 miles (KMWN Mount Washington -- not in our DB -- but >> there's a KHIE Mount Washington Rgnl!?). (That's assuming >> that the 9000 km from HAAB were a mistake. ;-) >> >> m. >> > > 9000km - lol:) > > I think I'd suspect the 110 miles figure (if that's a ground level > value) as well, not only because that's a lot of atmosphere to see > through but also because of curvature. > I work at the Longmont CO Seagate Technology development center which is located adjacent to the Longmont, CO Vance Brand field (KLMO). It is a typical clear Colorado day that I can clearly see Pikes Peak 80 nautical miles (148 km) to the south from high spots on the road or as I lift off from KLMO in the pa24. By typical, mean about half of the time in the winter and less in the summer due to haze or afternoon showers. This is high desert country and the humidity is usually very low (10 to 20 %).
I can never get fgfs visibility that models what I usually experience when I fly here. -Dave ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
