John,

ADS-B is not used in the States currently on 1090 Mhz ( Transponder TX
frequency ) They do however have mode S replies which depending on what
downlink is used , or DF reply, contains some basic information which they
are decoding and displaying. This same receiver can be used here in Oz , all
it needs is proper decoding of the full DF17 and 18 replies and an
understanding of the ADS-B messaging. We have a receiver here that does
that, eventually most will have these in their cockpits coupled to a moving
map or PDA to display ADS-B in Australia, providing excellent situation
awareness of other traffic that is ADS-B equipped, I hope to be displaying
this at the SAAA convention at Wagga in October, all are welcome for a hands
on demo of ADS-B and possibly the new Filser SX1000 glide computer which
will also be capable of displaying ADS-B aircraft.

For everyone's interest, Airservices will be releasing their tender for
supply of 1500 ADS-B transmitters this month, these will go into selected
1500 Australian registered aircraft for free, I am not sure how the selected
aircraft are selected. Already quite a few international jets are ADS-B
equipped , as well as virgin and the 17 or so in the Bundaberg trial. I have
already supplied transponders here which can be software upgraded to ADS-B
when they want to ( see www.avionicsaustralasia.com ) which are going into
RV7's so the transition is happening. The decision for a lower airspace go /
no go for ADS-B is still scheduled for next year, so the lower airspace is
still not a done deal, but there must be some confidence there otherwise we
wouldn't be seeing a tender this large.

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

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-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of John Giddy
Sent: Monday, September 05, 2005 8:47 AM
To: Discussion of issues relating to Soaring in Australia.
Subject: Re: [Aus-soaring] Re: Mode S


On Mon, 05 Sep 2005 08:21:53 +1000, you wrote:

> I'm not sure this is a good idea
> 
> http://www.aerflight.com/
> 
> However one might ask what multiple of US$900 an airservices ADSB 
> ground station costs.
> 
> Mike

Is ADSB implemented in USA and/or Canada yet ? I can't see how this gadjet
would work otherwise, and there is no mention in the "blurb" that ADSB needs
to be implemented. Regarding cost of base stations, I guess the ones
Airservices are buying cost a lot more than USD900, but then they are
looking for high reliability, and wide environmental survivability plus
remote control and monitoring of the station, which adds some complexity.
Still cost
*way* less and have much lower maintenance costs than a secondary radar
installation. Cheers,  John G.
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