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Agenda Item Wind Turbine Interference – Possible Mitigations

Agenda Item Wind Turbine Interference – Possible Mitigations. Jason Strong, Eng Mgr Surveillance Sensors NATS En-Route Ltd. Mitigation Options. Guidelines includes a variety of mitigation options which should be considered.

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Agenda Item Wind Turbine Interference – Possible Mitigations

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  1. Agenda Item Wind Turbine Interference – Possible Mitigations Jason Strong, Eng Mgr Surveillance Sensors NATS En-Route Ltd

  2. Mitigation Options • Guidelines includes a variety of mitigation options which should be considered. • The choice and appropriateness of mitigation options varies from case to case, influenced by: • Surveillance technology employed • Cooperative / Non-Cooperative • Age & Capability • Capacity • Supportability • Air Traffic Density • Number of flights per Hour • Airspace Volume • Air Traffic Complexity • Mix of Aircraft • Military / State Aircraft • En-Route or Terminal Control Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  3. Mitigation Applicability • Guidelines Identifies different options for different Surveillance Classifications • Non-Cooperative Surveillance Sensor • Cooperative Surveillance Sensors • Operational • Wind Turbine • It is rare & unlikely that a single mitigation technique is sufficient on its own. Often a combination of options needs to be employed. Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  4. Risks identified requiring mitigation • Reduced PSR Probability of Detection (Pd) • PSR False Targets • PSR Positional Accuracy • Overload of PSR Capabilities (Capacity) • Reduced SSR Pd • SSR False Targets • SSR Position Accuracy • Guidelines identify which mitigations are effective at addressing each type of risk. Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  5. Mitigation Options Table 1 – Page 48 Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  6. Mitigation Options Table 2 – Page 49 Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  7. Non-Cooperative Surveillance Sensor • Blank Azimuth Sector • Suppress returns in a range / azimuth sector • Filtering of Wind Farm false returns • Strengthen Track Initiation Conditions • Adapt PSR overload prevention facilities • Upgrade PSR processing capabilities • Upgrade PSR output interface capabilities • In-Fill PSR • In-Fill MSPSR Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  8. PSR Blanking • Either a whole azimuth sector or range defined. • Effective way of addressing clutter & capacity related issues. • Obvious drawback of blanking out real aircraft returns • Maybe be suitable in certain operational situations, e.g.: • Low Risk of non-cooperative aircraft • Low complexity • Low traffic density Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  9. PSR Processing • Improved Processing Techniques • Increase Probability of Detection • Reduce the number of false plots • Improve the acquisition of targets through enhanced track initiation techniques • Use of Non-Auto Initiation zones • Several manufacturers looking at enhancements to existing technology or new/alternative replacement technology • Complex solution but potentially offers the most ‘complete’ mitigation option. Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  10. Surveillance ‘In Fill’ • Applicable to both cooperative & non cooperative surveillance • Places more emphasis mitigation at the end user rather than the Radar Head • Requires a surveillance picture to be built up from multiple surveillance sensors • Mosaic solution • Multi-Radar Tracking solution • Effective solution but limited in number of applications due to: • Computational limitations • Finite maximum number of surveillance sensors • Accuracy requirements Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  11. Cooperative Surveillance System • Blank SSR Transmission in an azimuth sector • In-Fill SSR • In-Fill Wide Area Multilateration (WAM) • In-Fill ADS-B • Improve SSR Anti-Reflection capability / Mode-S Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  12. Operational • Move ATC Route • Change airspace classification or create a Transponder Mandatory Zone Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  13. Wind Turbine • Move Turbines to outside Radar Line of Site • Move Turbines out of Critical Areas • Change Windfarm layout • Reduce number of turbines within Line of Site • Reduce Wind Turbine Reflectivity Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

  14. Jason Strong Engineering Manager, Surveillance Sensors Jason.strong@nats.co.uk +44 1489 444701 NATS, Corporate & Technical Centre, 4000/4200 Parkway Whiteley, Fareham, Hampshire. UK PO15 7FL Sustainable Energy – Sustainable ATC Surveillance Workshop – Eurocontrol, Brussels, April 2010

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