I wouldn't want to be within site of one of those large orange rotating ASR-8 or ASR-9 airport surveilance RADARs when launching a small rocket - otherwise here in the US there shouldn't be any problem. The Doppler 'shift' component will be negligible going downrange (horizontal direction) - unless the wind picks up or your rocket goes horizontal in flight! Jim PS. Peter, for us our (distant) 'early warning system' (now called "North Warning System or NWS) is located in Canada/Alaska/Arctic Circle area. Here in the continental states the ASR/ARSR system operated by the FAA serves the duty of watching our skies for aircraft. Then, of course, with this current 'lock-down' there are AWACS aircraft also watching some skies. ----- Original Message ----- From: "Peter L. Peres" To: Sent: Thursday, September 20, 2001 3:23 PM Subject: Re: [OT]: Rockets banned? > I think that it makes sense to ban some firearms and small rockets (with > unannounced launches) when the whole country's doppler early warning > systems are listening for doppler from incoming missiles. Maybe I am > exaggerating but with the radar equation being what it is maybe a backyard > estes rocket in some tiny side lobe could appear as a ICBM for a brief > moment of time on some screen or other. I suspect that these things will > mark anything moving faster than sound as a target no matter what. > > I also think that it makes sense to remove the restriction asap > thereafter. > > Peter > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics