Torres Mario 678-3280 AMSRL-BE-M (mtorres++at++arl.mil)
Wed, 24 May 95 10:22:57 MDT
In the AeroSense SPIE April 1995 conference we published a paper that
does exactly what you are looking for, a calibration of the fog function in
comparasion with well established physical models.
Title: "Representation of meteorological visibility in real-time
simulation of targets and backgrounds"
Mario A. Torres and Dr. Donald W. Hoock, Jr.
We have found that for "realistic" representation of fog, haze or dust,
we can use Performers EXP1 function and that the trick is in computing the
physically correct far-fog range to submit to the pfFogRange function.
We relate the far-fog range to a desired meteorological visibility as
defined by Koschmider's relations. Simply,
Zfog-far = (Visibility * 5500.0)/3.912
Where Visibility is given in Kilometers.
This Should do the trick for you.
Mario A. Torres
STC for Army Research Lab.
Battlefield Environment Division
> >
> Greetings,
>
> We are building an airport simulation and need to have
> accurate Runway Visibility Range (RVR) for fog.
>
> Has anyone done any fog calibrations using Performers
> fog functions? Is there a preferred fog type to use
> for accurate fog RVR distances?
>
> Any information would be greatly appreciated.
>
> Thanks.
>
> Steve Elkins
> *****************************************************************************
> Steve Elkins
> Sterling Software
> NASA Ames Research Center
> spelk++at++bert.arc.nasa.gov
> *****************************************************************************
>
>
>
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