Originally Posted by
ORAC
They coul£ have been flying balloons through NATO airspace for years and no one will even have been aware as the processing used to remove cloud clutter from radar (Doppler MTI/MTD), will also remove anything drifting with the wind.
In my experience, (over 35 years of watching radar screens) UK air defence can use totally uncancelled/unprocessed radar when they need to and that will show ALL targets both moving and static no matter how slowly they are moving.