: Public <<DataType>> Class
Created: 2/03/2012 5:00:32 PM
Modified: 22/06/2015 12:29:21 AM
Project:
Advanced:
An aggregation of runway visual range conditions for a single runway, typically reported together at an aerodrome
Attribute
Public RunwayDirection
  runway
Details:
sequenceNumber=1
Notes: The runway to which reported runway visual range information applies
Public Distance
  meanRVR
Details:
quantity=http://codes.wmo.int/common/quantity-kind/runwayVisualRangeRvr
sequenceNumber=2
Notes: The mean recent runway visual range value observed. This mean represents the 10 minute average for observed RVR except when the 10-minute period immediately preceding the observation includes a marked discontinuity in runway visual range values, only those values occurring after the discontinuity is used for obtaining mean values.#lt;br /#gt;#lt;/p#gt;#lt;p#gt;#lt;br /#gt;#lt;/p#gt;#lt;p#gt;To report a mean RVR of at least 2000 meters, mean RVR is reported as 2000 meters and the operator is reported as "above"#lt;br /#gt;#lt;/p#gt;#lt;p#gt;#lt;br /#gt;#lt;/p#gt;#lt;p#gt;Annex 3:#lt;br /#gt;#lt;/p#gt;#lt;p#gt;Table A3-2 "RVR/RVR"#lt;br /#gt;#lt;/p#gt;#lt;p#gt;Section 4.3.6.6#lt;br /#gt;#lt;/p#gt;
Public RelationalOperator
  meanRVROperator
Details:
sequenceNumber=3
Notes: The reported relational operator for the mean RVR. When reported, this operator is reported in conjunction with mean RVR.  #lt;br /#gt;#lt;/p#gt;#lt;p#gt;#lt;br /#gt;#lt;/p#gt;#lt;p#gt;To report a mean RVR of at least 2000 meters, mean RVR is reported as 2000 meters and the operator is reported as "above".#lt;br /#gt;#lt;/p#gt;#lt;p#gt;#lt;br /#gt;#lt;/p#gt;#lt;p#gt;When no operator is reported, mean RVR represents an exact value with identical semantics to other measured quantities#lt;br /#gt;#lt;/p#gt;
Public VisualRangeTendency
  pastTendency
Details:
sequenceNumber=4
xsdAsAttribute=true
Notes: The runway visual range tendency (up, down, none).#lt;br /#gt;#lt;/p#gt;#lt;p#gt;#lt;br /#gt;#lt;/p#gt;#lt;p#gt;If the runway visual range values during the 10-minute period have shown a distinct tendency, such that the mean during the first 5 minutes varies by 100 m or more from the mean during the second 5 minutes of the period, this should be indicated. When the variation of the runway visual range values shows an upward or downward tendency, this should be indicated by "Up" or "Down", respectively. In circumstances when actual fluctuations during the 10-minute period show no distinct tendency, this should be indicated using "No Change?. When indications of tendency are not available, no information should be reported#lt;br /#gt;#lt;/p#gt;#lt;p#gt;#lt;br /#gt;#lt;/p#gt;#lt;p#gt;ICAO Annex 3 / WMO No. 49:#lt;br /#gt;#lt;/p#gt;#lt;p#gt;Table A3-2 Note 9#lt;br /#gt;#lt;/p#gt;#lt;p#gt;Section 4.3.6.6a#lt;br /#gt;#lt;/p#gt;
Element Source Role Target Role
MeteorologicalAerodromeObservationRecord
Class   		Name:  
  		Name: rvr
 
Details:
RVR conditions are required if horizontal visibility or RVR is less than 1500 meters, up to a maximum of four runways