surehot electronic holdover time service
What we do Weather and operational support solutions for airport and air carrier applications
Holdover Time Science 101
Holdover Time Tables
Holdover Time Science 101 De/anti-icing fluid holdover times are an important tool in the safety of w inter flight operations Significant amount of research and development was performed and the quality of the data employed in the current holdover time tables is excellent WEATHER Wx SOLUTIONS AND AND OPERATIONAL SUPPORT SYSTEMS
Fluid Testing
Holdover Time Tables The holdover time for any aircraft de/anti-icing fluid is a function of three variables: Rate of precipitation (LWE) Ty pe of precipitation Ambient temperature
Holdover Time Tables 0:40 1:05 The holdover time for any aircraft de/anti-icing fluid is a function of three variables: Rate of precipitation (LWE) =? Ty pe of precipitation = Snow Ambient temperature = -4 Celsius
Holdover Time Science 101 120 LIGHT SNOW MODERATE SNOW HEAVY SNOW 110 100 HOT RANGE 0:40 to 1:05 Below -3 to -14ºC -14 90 80 Failure Time (min) 70 60 50 40 Rate of 7 g/dm2/h = 1:20 HOT NO HOTs EXIST Rate of 40 g/dm2/h = 0:31 HOT -4.3C 30 20 Rate of 17 g/dm2/h = 0:50 HOT -14C -14ºC 10 0 0 5 10 15 20 25 30 35 40 45 Plate Pan Rate of Precipitation (g/dm²/h)
Holdover Times Flight crew s ability to extract the proper information from the tables has not advanced w ith the science employed to build the tables Refinement of the format would allow for expansion of operational use of fluid holder times
System consists of numerous sensors enabling the determination of: Rate of precipitation Type of precipitation Ambient temperature System measurements used to generate an accurate holdover time (HOT) for each departing aircraft based actual conditions System output can be configured to generate HOT information according to the client s preference and operational needs
All data from the sensor units in the field are transmitted via cellular network to the SureWx central server
Data Communication DIIS CYUL 1401211755Z SN M1 HLD OVR TYPE I 14 MIN HLD OVR TYPE IV 78 MIN DIIS CYUL 1401211640Z FZRA M1 HLD OVR TYPE I 4MIN HLD OVR TYPE IV 31MIN
Applications
Applications
Applications
Web Portals
Web Portals
Benefits
Benefits Improved operational planning for airports, carriers and service providers Enhanced ATC processes w ithin A-CDM More frequent w inter weather information for w inter flight planning More accurate identification of de/anti-icing conditions Better identification of changing weather Accurate determination of fluid holdover times Enable better fluid selection Enable expanded use of current holdover time information Expanded holdover times for all fluids, including Ty pe I Reduction of human factor involvement in holdover time assessment Reduction of departures w ith exceeded fluid holdover times Economic Savings
Benefits Reduced costs of fluids and recovery/ recycling Source Reduction of Glycol Reduction of environmental impacts and costs Operational Improvement Airport throughput Time management Airport Implications Runw ay maintenance Application of runw ay de/anti-icers
Commercial Service Transport Canada issued regulatory approval process for LWE systems in December 2007 (Exemption from CAR 602.11) SureWx completed operational assessment w ith WestJet 2008-10, and began commercial service in 2010 FA A initiated Ops Demo for LWE systems in advance of w inter 2013-14 SureWx Ops Demo partner is FedEx
Installations
EDMONTON CALGARY OTTAWA MONTREAL TORONTO TORONTO CITY
ANCHORAGE INDIANAPOLIS
LONDON-HEATHROW PARIS-CHARLES DE GAULLE