X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [69.171.52.140] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 5.0c2) with HTTP id 721185 for lml@lancaironline.net; Tue, 13 Sep 2005 21:35:06 -0400 From: "Marvin Kaye" Subject: Re: [LML] Re: Mode S transponders To: lml X-Mailer: CommuniGate Pro WebUser v5.0c2 Date: Tue, 13 Sep 2005 21:35:06 -0400 Message-ID: In-Reply-To: <00bd01c5b87f$6da56380$0200a8c0@XP1700> References: <00bd01c5b87f$6da56380$0200a8c0@XP1700> X-Priority: 3 MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "Lennart Persson" : Skip, ADS-B stands for Automatic Dependent Surveillance - Broadcast, and it can be achieved thru the extended Mode-S squitter ADS-B messages or thru VDL-4. Biz-jets and airlineres are or will be using the Mode-S messages to update thier TCAS. Mode-S transponders are in this case just a transmission source, and VHF Datalink Mode 4 (using 108-138 MHz) is another communication vehicle, and has about the same information as the Mode-S squitter. It would be interesting to see what the plans are for extending ADS-B. It does require a new radio in the air-craft, and I think Garmin will be happy to develop one. Lennart