[Aus-soaring] RE: Robert,More information on Flarm

[RF Developments Pty Ltd]

Title: Message

Hi Robert,   We had this discussion before on ADS-B and FLARM. These a two different systems for different purposes. ADS-B is primarily an ATC system, used for providing ATC tracking, arranging separation for other aircraft, crash avoidance etc etc. It will have eventually Australia wide coverage above a certain altitude, far exceeding our current, transponder based surveillance.   FLARM is a unique system for gliding and possibly airports that have gliding and G.A. Its purpose is only for situation awareness - and < 1km! This is fine for our activity and it appears to be finally reaching some maturity, albeit there still appears to be some bugs. There is no reason why the 2 cannot co exist. As you know we are developing an Australian version of FLARM which is well progressed, which will have compatibility with SWISS FLARM , and , ADS-B. ADS-B will require the addition of a receiver, which we are developing for the G.A market. This allows us to have alerts for both gliding and G.A if you want. The OZ-FLARM display will be slightly different, allowing you to clearly know whether you have an ADS-B alert, or FLARM alert. FLARM will always be a priority!   I have here a development platform for the FLARM transceivers they use, there are several issues with using the ISM band which are apparent when you run it, and Swiss FLARM probably know this but are not telling - I think we can get around it, that's what we are working on now.   I haven't heard about the talk at DDSC for the state comp yet, but I can go through this then with all the pilots - have you any news on that?   Cheers   Nigel         Nigel Andrews Technical  Director Avionics Australasia Pty Ltd "A Queensland Company devoted to Research and Development, Avionics manufacturing and sales in aviation electronics" Email [EMAIL PROTECTED] Web www.avionicsaustralasia.com Ph: (61) 7 54635670 Fax: (61) 7 54635695 **************DISCLAIMER************ The information contained in the above e-mail message or messages (which includes any attachments) is confidential and may be legally privileged. It is intended only for the use of the person or entity to which it is addressed. If you are not the addressee any form of disclosure, copying, modification, distribution or any action taken or omitted in reliance on the information is unauthorised. If you received this communication in error, please notify the sender immediately and delete it from your computer system network. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Hart Sent: Tuesday, September 06, 2005 8:58 PM To: [EMAIL PROTECTED]; Discussion of issues relating to Soaring in Australia. Subject: Re: [Aus-soaring] More information on Flarm Peter and Mandy Temple wrote: G’day all, I’ve received further information on operation of the Flarm. All of the improvements that I considered (and more) were already in the unit that I flew with in France! See the report dated 6 September on http://www.users.on.net/~mwilson/vinon2005/ Many thanks for the info - very interesting. I look forward to hearing how the trials go at Gawler. With the reports we have been getting from Europe, it sounds as if FLARM is a truly excellent device. There is only one issue I have with it: if the gliding world in Oz adopts FLARM, how are we going to interface to the rest of aviation (who will be using ADS-B). >From what Migel Andrews has been saying, it is relatively easy to add ADS-B reception to FLARM. This will give the gliding world information about what the rest of aviation is doing in the sky around them, but it won't give the rest of aviation information about the gliders in the sky. Adding ADS-B transmit is a problem in terms of power usage, but I can see another prolem too. If gliders start xmitting ADS-B info (in addition to FLARM), it will be necessary to suppress the ADS-B info from other gliders to prevent alarms going off all over the place in gaggles and such. Having read the article posted here a week or so ago (written by someone in GA I think - I can't find the article in the archive), I am not sure that the rest of the aviation world is quite aware of the problems that ADS-B has for glider operations. -- Robert Hart [EMAIL PROTECTED] +61 (0)438 385 533 Brisbane, Australia http://www.hart.wattle.id.au

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