| Résumé | The National Research Council's Associate Committee on Bird Hazards to Aircraft requested an investigation of the best type of radar to provide air traffic controllers with information of hazardous flocks of airborne birds in the vicinity of airports. During three successive spring migrations of the Lesser Snow Geese through the Winnipeg area, the authors have tested the following types of radar : (a) surveillance radar, (b) tracking radar, and (c) nodding beam height finder. As a result of the trials and discussions with air traffic control personnel, the conclusion was reached that a radar with stepped antenna scan and automate detection, and providing three-dimensional positions of bird flocks would provide the best answer. In addition, this radar would also give information on hazardous weather conditions. Further calculations, experiments, and discussions are being carried out prior to writing preliminary specifications for the new radar. |
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