<?xml version="1.0" ?>
<!--
 This file is part of FlightGear, the free flight simulator
 http://www.flightgear.org/

 Copyright (C) 2009 Torsten Dreyer, Torsten (at) t3r _dot_ de

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License as
 published by the Free Software Foundation; either version 2 of the
 License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.
-->
<PropertyList>
  <name>MetarController:layer:wind-speed-kt</name>
  <type>gain</type>
  <gain>1.0</gain>
  <enable>
    <condition>
      <property>/environment/metar/valid</property>
      <property>/environment/params/metar-updates-environment</property>
    </condition>
  </enable>
  <input>
    <expression>
      <product>
        <property>/environment/config/boundary/entry[0]/wind-speed-kt</property>
        <sum>
          <property>/environment/config/boundary/entry[1]/wind-speed-change-rel</property>
          <value>1.0</value>
        </sum>
      </product>
    </expression>
  </input>
  <output>/environment/config/boundary/entry[1]/wind-speed-kt</output>
</PropertyList>