1. Agenda item 1 Real examples of impact of wind turbines on radar operations Daan Rabijns, Belgocontrol

2. 2 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 4 cases 1.measurable effects of a single turbine at 60 km from the radar 2.severe operational impact: Büchel (GE) 3.severe operational impact: Villancien (Fr) 4.example with tolerable operational impact

3. 3 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 case 1: a single turbine (142m) at 60 km

4. 4 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 case 1: measured impact primary only mode S only combined

5. 5 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Case 2: unacceptable impact No track initiation within the cells Only update of existing tracks ASR Cells 200 x 200 m 2

6. 6 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Radar Case 2: example 1, Airliner FL350 wind turbine plot (not shown to ATCO) Track (shown to ATCO) Track initiation delay: 3 scans Coasting : 3 scans

7. 7 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Radar Case 2: example 1, Fighter Approach wind turbine plot (not shown to ATCO) Track (shown to ATCO) Track initiation delay: 3 scans Coasting : 3 scans

8. 8 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Case 3: turbines 34 km from the radar 4/6 turbines 142m radar test flight

9. 9 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Case 3: turbines 34 km from the radar

10. 10 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Case 4: tolerable operational impact

11. 11 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Case 4: tolerable operational impact landing aircraft 10 turbines 149m aircraft w/o transponder Cessna

12. 12 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Case 4: tolerable operational impact

13. 13 Sustainable Energy – Sustainable ATC Surveillance Workshop Eurocontrol, Brussels, April 2010 Conclusions case 1: Impact on PSR can extend to end of radar range case 2 and 3: Impact not tolerable case 4: Tolerable impact on ATCO screen examples can not be generalized

14. Daan Rabijns Belgocontrol Tervuursesteenweg 303 B-1820 Steenokkerzeel phone : +32 2 206 22 15 fax : +32 2 206 22 01 rad@belgocontrol.be www.belgocontrol.be