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fgdata/Environment/metarinterpolator.xml

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<?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.
-->
<!--
Interpolate the METAR weather values over time and write
the environment values in /environment/config/*
All filters are enabled if /environment/metar/valid=true
-->
<PropertyList>
<filter>
<!--
transfer the METAR QNH to the interpolation controller
limit the rate of change to approx 0.01hpa/sec
-->
<name>MetarController:pressure-sea-level-inhg</name>
<type>noise-spike</type>
<max-rate-of-change>0.006</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/pressure-sea-level-inhg</input>
<output>/environment/config/boundary/entry/pressure-sea-level-inhg</output>
<output>/environment/config/aloft/entry/pressure-sea-level-inhg</output>
</filter>
<filter>
<!--
transfer the sea-level temperature to each layer of
interpolation controller. We have no idea here about
the temperature gradient, so just assume ISA.
-->
<name>MetarController:temperature-sea-level-degc</name>
<type>noise-spike</type>
<max-rate-of-change>0.01667</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/temperature-sea-level-degc</input>
<output>/environment/config/boundary/entry[0]/temperature-sea-level-degc</output>
<output>/environment/config/boundary/entry[1]/temperature-sea-level-degc</output>
<output>/environment/config/aloft/entry[0]/temperature-sea-level-degc</output>
<output>/environment/config/aloft/entry[1]/temperature-sea-level-degc</output>
<output>/environment/config/aloft/entry[2]/temperature-sea-level-degc</output>
<output>/environment/config/aloft/entry[3]/temperature-sea-level-degc</output>
<output>/environment/config/aloft/entry[4]/temperature-sea-level-degc</output>
</filter>
<filter>
<!--
transfer the sea-level dewpoint to each layer of
interpolation controller. This is most certainly
wrong in most cases.
-->
<name>MetarController:dewpoint-sea-level-degc</name>
<type>noise-spike</type>
<max-rate-of-change>0.01667</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/dewpoint-sea-level-degc</input>
<output>/environment/config/boundary/entry[0]/dewpoint-sea-level-degc</output>
<output>/environment/config/boundary/entry[1]/dewpoint-sea-level-degc</output>
<output>/environment/config/aloft/entry[0]/dewpoint-sea-level-degc</output>
<output>/environment/config/aloft/entry[1]/dewpoint-sea-level-degc</output>
<output>/environment/config/aloft/entry[2]/dewpoint-sea-level-degc</output>
<output>/environment/config/aloft/entry[3]/dewpoint-sea-level-degc</output>
<output>/environment/config/aloft/entry[4]/dewpoint-sea-level-degc</output>
</filter>
<filter>
<!--
transfer the visibility to each layer of
interpolation controller. We are not very creative here and
use the same visibility for all layers but top four which
are left untouched.
-->
<name>MetarController:visibility-m</name>
<type>exponential</type>
<filter-time>5</filter-time>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/min-visibility-m</input>
<output>/environment/config/boundary/entry[0]/visibility-m</output>
<output>/environment/config/boundary/entry[1]/visibility-m</output>
<output>/environment/config/aloft/entry[0]/visibility-m</output>
</filter>
<filter>
<!--
transfer the rain intensity to the target environment
-->
<name>MetarController:rain-norm</name>
<type>noise-spike</type>
<max-rate-of-change>1.0</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/rain-norm</input>
<output>/environment/rain-norm</output>
</filter>
<filter>
<!--
transfer the snow intensity to the target environment
-->
<name>MetarController:snow-norm</name>
<type>noise-spike</type>
<max-rate-of-change>1.0</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/snow-norm</input>
<output>/environment/snow-norm</output>
</filter>
<!-- interpolate the wind vector's components -->
<filter>
<name>MetarController:wind-from-north-fps</name>
<type>noise-spike</type>
<max-rate-of-change>1.0</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/base-wind-from-north-fps</input>
<output>/environment/config/boundary/entry[0]/wind-from-north-fps</output>
</filter>
<filter>
<name>MetarController:wind-from-east-fps</name>
<type>noise-spike</type>
<max-rate-of-change>1.0</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/base-wind-from-east-fps</input>
<output>/environment/config/boundary/entry[0]/wind-from-east-fps</output>
</filter>
<!-- Adjust the wind-vector for the layers -->
<!-- TODO: handle variable winds -->
<filter include="layer-heading-offset.xml"/>
<filter include="layer-heading-offset.xml">
<name>MetarController:layer:wind-from-heading-deg_0</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[0]/wind-heading-change-deg</offset>
</input>
<output>/environment/config/aloft/entry[0]/wind-from-heading-deg</output>
</filter>
<filter include="layer-heading-offset.xml">
<name>MetarController:layer:wind-from-heading-deg_1</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[1]/wind-heading-change-deg</offset>
</input>
<output>/environment/config/aloft/entry[1]/wind-from-heading-deg</output>
</filter>
<filter include="layer-heading-offset.xml">
<name>MetarController:layer:wind-from-heading-deg_2</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[2]/wind-heading-change-deg</offset>
</input>
<output>/environment/config/aloft/entry[2]/wind-from-heading-deg</output>
</filter>
<filter include="layer-heading-offset.xml">
<name>MetarController:layer:wind-from-heading-deg_3</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[3]/wind-heading-change-deg</offset>
</input>
<output>/environment/config/aloft/entry[3]/wind-from-heading-deg</output>
</filter>
<filter include="layer-heading-offset.xml">
<name>MetarController:layer:wind-from-heading-deg_4</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[4]/wind-heading-change-deg</offset>
</input>
<output>/environment/config/aloft/entry[4]/wind-from-heading-deg</output>
</filter>
<filter include="layer-speed-change.xml"/>
<filter include="layer-speed-change.xml">
<name>MetarController:layer:wind-speed-kt_0</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[0]/wind-speed-change-rel</offset>
</input>
<output>/environment/config/aloft/entry[0]/wind-speed-kt</output>
</filter>
<filter include="layer-speed-change.xml">
<name>MetarController:layer:wind-speed-kt_1</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[1]/wind-speed-change-rel</offset>
</input>
<output>/environment/config/aloft/entry[1]/wind-speed-kt</output>
</filter>
<filter include="layer-speed-change.xml">
<name>MetarController:layer:wind-speed-kt_2</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[2]/wind-speed-change-rel</offset>
</input>
<output>/environment/config/aloft/entry[2]/wind-speed-kt</output>
</filter>
<filter include="layer-speed-change.xml">
<name>MetarController:layer:wind-speed-kt_3</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[3]/wind-speed-change-rel</offset>
</input>
<output>/environment/config/aloft/entry[3]/wind-speed-kt</output>
</filter>
<filter include="layer-speed-change.xml">
<name>MetarController:layer:wind-speed-kt_4</name>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
<property>/environment/params/metar-updates-winds-aloft</property>
</condition>
</enable>
<input>
<offset>/environment/config/aloft/entry[4]/wind-speed-change-rel</offset>
</input>
<output>/environment/config/aloft/entry[4]/wind-speed-kt</output>
</filter>
<!-- Clouds -->
<filter include="clouds-altitude-interpolate.xml"/>
<filter include="clouds-altitude-interpolate.xml">
<name>MetarController:clouds:altitude_interpolate_0</name>
<params>
<from>/environment/metar/clouds/layer[1]/elevation-ft</from>
<to>/environment/clouds/layer[1]/elevation-ft</to>
</params>
</filter>
<filter include="clouds-altitude-interpolate.xml">
<name>MetarController:clouds:altitude_interpolate_1</name>
<params>
<from>/environment/metar/clouds/layer[2]/elevation-ft</from>
<to>/environment/clouds/layer[2]/elevation-ft</to>
</params>
</filter>
<filter include="clouds-altitude-interpolate.xml">
<name>MetarController:clouds:altitude_interpolate_2</name>
<params>
<from>/environment/metar/clouds/layer[3]/elevation-ft</from>
<to>/environment/clouds/layer[3]/elevation-ft</to>
</params>
</filter>
<filter include="clouds-altitude-interpolate.xml">
<name>MetarController:clouds:altitude_interpolate_3</name>
<params>
<from>/environment/metar/clouds/layer[4]/elevation-ft</from>
<to>/environment/clouds/layer[4]/elevation-ft</to>
</params>
</filter>
<filter include="clouds-thickness.xml"/>
<filter include="clouds-thickness.xml">
<name>MetarController:clouds:thickness_0</name>
<input>/environment/metar/clouds/layer[1]/thickness-ft</input>
<output>/environment/clouds/layer[1]/thickness-ft</output>
</filter>
<filter include="clouds-thickness.xml">
<name>MetarController:clouds:thickness_1</name>
<input>/environment/metar/clouds/layer[2]/thickness-ft</input>
<output>/environment/clouds/layer[2]/thickness-ft</output>
</filter>
<filter include="clouds-thickness.xml">
<name>MetarController:clouds:thickness_2</name>
<input>/environment/metar/clouds/layer[3]/thickness-ft</input>
<output>/environment/clouds/layer[3]/thickness-ft</output>
</filter>
<filter include="clouds-thickness.xml">
<name>MetarController:clouds:thickness_3</name>
<input>/environment/metar/clouds/layer[4]/thickness-ft</input>
<output>/environment/clouds/layer[4]/thickness-ft</output>
</filter>
<filter include="clouds-coverage.xml"/>
<filter include="clouds-coverage.xml">
<name>MetarController:clouds:coverage_0</name>
<params>
<from>/environment/metar/clouds/layer[1]/coverage-type</from>
<to>environment/clouds/layer[1]/coverage-type</to>
</params>
</filter>
<filter include="clouds-coverage.xml">
<name>MetarController:clouds:coverage_1</name>
<params>
<from>/environment/metar/clouds/layer[2]/coverage-type</from>
<to>environment/clouds/layer[2]/coverage-type</to>
</params>
</filter>
<filter include="clouds-coverage.xml">
<name>MetarController:clouds:coverage_2</name>
<params>
<from>/environment/metar/clouds/layer[3]/coverage-type</from>
<to>environment/clouds/layer[3]/coverage-type</to>
</params>
</filter>
<filter include="clouds-coverage.xml">
<name>MetarController:clouds:coverage_3</name>
<params>
<from>/environment/metar/clouds/layer[4]/coverage-type</from>
<to>environment/clouds/layer[4]/coverage-type</to>
</params>
</filter>
<filter>
<name>MetarController:cloud-visibility-m</name>
<type>exponential</type>
<filter-time>5</filter-time>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/clouds/layer[0]/visibility-m</input>
<output>/environment/clouds/layer[0]/visibility-m</output>
</filter>
<filter>
<name>MetarController:cloud-alpha</name>
<type>noise-spike</type>
<max-rate-of-change>0.2</max-rate-of-change>
<enable>
<condition>
<property>/environment/metar/valid</property>
<property>/environment/params/metar-updates-environment</property>
</condition>
</enable>
<input>/environment/metar/clouds/layer[0]/alpha</input>
<output>/environment/clouds/layer[0]/alpha</output>
</filter>
<!--
Place snow line at estimated climatic snow line.
-->
<filter>
<name>MetarController:climatic-snow-line</name>
<type>gain</type>
<gain>1.0</gain>
<enable>
<condition>
<property>/environment/params/metar-updates-snow-level</property>
<property>/environment/params/metar-updates-environment</property>
<not><property>/environment/metar/snow-cover</property></not>
</condition>
</enable>
<input>
<expression>
<sum>
<product>
<property>/position/latitude-deg</property>
<property>/position/latitude-deg</property>
<value>-1</value>
</product>
<product>
<value>8.255</value>
<property>/position/latitude-deg</property>
</product>
<value>5504</value>
</sum>
</expression>
</input>
<output>/environment/snow-level-m</output>
<min>-425</min>
<max>7500</max>
</filter>
<!--
Lower the snow line when a station below the current snow line reports
snow cover.
-->
<filter>
<name>MetarController:snow-level</name>
<type>gain</type>
<gain>1.0</gain>
<enable>
<condition>
<property>/environment/params/metar-updates-snow-level</property>
<property>/environment/params/metar-updates-environment</property>
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<property>/environment/metar/snow-cover</property>
<property>/environment/metar/valid</property>
<less-than>
<expression>
<difference>
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<product>
<property>/environment/metar/station-elevation-ft</property>
<value>0.3048</value>
</product>
<property>/environment/snow-level-m</property>
</difference>
</expression>
<value>0</value>
</less-than>
</condition>
</enable>
<input>
<expression>
<sum>
<product>
<property>/environment/metar/station-elevation-ft</property>
<value>0.3048</value>
</product>
<value>-50.0</value>
</sum>
</expression>
</input>
<output>/environment/snow-level-m</output>
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<min>-425</min>
<max>7500</max>
</filter>
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<!--
Windsock effects: flex and light-map
-->
<filter>
<name>MetarController:layer:wind-sock-pos</name>
<type>gain</type>
<gain>6.7</gain>
<reference>15</reference>
<input>/environment/wind-speed-kt</input>
<output>/sim/environment/windsock-pos</output>
<min>-90</min>
<max>0</max>
</filter>
<filter>
<name>MetarController:layer:wind-sock-light</name>
<type>gain</type>
<input>
<expression>
<table>
<property>/sim/time/sun-angle-rad</property>
<entry><ind>0.0</ind><dep>0.0</dep></entry>
<entry><ind>1.56999</ind><dep>0.0</dep></entry>
<entry><ind>1.57</ind><dep>1.0</dep></entry>
</table>
</expression>
</input>
<output>/sim/environment/windsock-light</output>
</filter>
<min>0.0</min>
<max>1.0</max>
</PropertyList>