Added the new REDUCE_PRESSURE filter

inishell-apps/meteoio_filters.xml

@@ -82,6 +82,7 @@ INIshell include file for MeteoIO filters
 				<reference name="PROC_UNVENTILATED_T"/>
 				<reference name="PROC_PSUM_DISTRIBUTE"/>
 				<reference name="PROC_SHADE"/>
+				<reference name="PROC_REDUCE_PRESSURE"/>
 				<reference name="PROC_RHWATERTOICE"/>
 				<reference name="PROC_TRANSFORMWINDVECTOR"/>
 				<help>Select filter for parameter "${text}"</help>
@@ -917,6 +918,15 @@ INIshell include file for MeteoIO filters
 			<help>&lt;a href=&quot;https://models.slf.ch/docserver/meteoio/html/classmio_1_1ProcShade.html&quot;&gt;Apply shading to radiation measurements&lt;/a&gt;. The shading from the surrounding is either computed from the DEM (provided with the DEM plugin) or from a provided horizon file. If an output file is provided, the horizons will be written back to this output file (if at least one has been computed from the DEM).</help>
 		</option>
 	</parametergroup>
+	
+	<!-- PROC REDUCE_PRESSURE -->
+	<parametergroup name="PROC_REDUCE_PRESSURE">
+		<option caption="Reduce pressure to sea level" value="REDUCE_PRESSURE" type="string" color="#459a4a">
+			<reference name="ID_RESTRICT"/>
+			<reference name="TIME_RESTRICT"/>
+			<help>&lt;a href=&quot;https://models.slf.ch/docserver/meteoio/html/classmio_1_1ProcReducePressure.html&quot;&gt;reduce pressure&lt;/a&gt;. This converts local air pressure to sea level pressure.</help>
+		</option>
+	</parametergroup>
 
 	<!-- PROC RHWATERTOICE -->
 	<parametergroup name="PROC_RHWATERTOICE">