Future status of Primary Surveillance: Non-cooperative surveillance is retained in Surveillance Strategy for ECAC, to support the safety case for TMA services and some En-Route environments Requested evolutions vs current PSR technologies: Increase effectiveness in detecting small, lightweight, modern composite aircraft of small radar cross sectional area; Improve spectrum efficiency; Strongly increase cost effectiveness Possible technological approaches: Incremental evolutions of PSR sensors not likely to achieve the requested step; A "breakthrough" approach based on low-cost distributed sensors (MSPSR) appears to be a promising way.
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