Hi Stuart,

On 8/8/07, Stuart Buchanan <[EMAIL PROTECTED]> wrote:

> I'd be very grateful if you could help me diagnose the problem, as I did
> quite a lot of testing, but didn't encounter this myself.

Happy to help.

> One possibility is that my interpolation is "fighting" with something else
> trying to write to the weather properties.
>
> Could you explain what you are seeing in terms of wind direction and
> strength? Is it:
> - oscillating in direction and/or speed
> - rotating continually?
> - chaotic?

Definitely oscillating between two direction/speed settings (looking
at the windsock makes this clear). Timing is not as regular, but
roughly on the order of 1/2 to 1 second between changes. The problem
is continual and omnipresent.

> If it is easily reproducable, could you run with the following
> command-line parameters and post the results, either to the list or
> directly to me:
>
> --trace-write=/environment/metar/real-metar
> --trace-write=/environment/metar/base-wind-range-from
> --trace-write=/environment/metar/base-wind-range-to
> --trace-write=/environment/metar/base-wind-speed-kt
> --trace-write=/environment/metar/gust-wind-speed-kt
> --trace-write=/environment/config/boundary/entry/wind-speed-kt
> --trace-write=/environment/config/boundary/entry/wind-from-heading-deg

Attached

> Once again, my apologies if this has spoilt anyone's flights. If this is
> causing people problems, it should probably be backed out. However, I
> would like to get to the bottom of the issue, as a (working) patch to
> interpolate METAR is something that we need.

I'd like to see it fixed rather than backed out, but whatever is best.
It doesn't make things unflyable (usually), just unpleasant.

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