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  #11  
Old 02-10-2019, 10:06 AM
Brdog42 Brdog42 is offline
 
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A friend of mine is the “payload specialist” “payload manager” (not sure of title) for those Aieron satellites. Been with the Iridium stuff since the Motorola days. He’s all wired from two weeks prior to launch until after the bird is in orbit with a good self test. They started putting the ADS-B packages on the satellites starting n December 2017, I think. Ten satellites per launch. His Debonair has the Lynx Diversity unit and he’s testing the GA side on his airplane. Claims they can also send text and voice over the data stream, IIRC. I’ll check. All ov the oceanic tracks will go to this system. No more HF as primary. :-) I’ll see what he says about the above. May take a day or two...

Tim
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  #12  
Old 02-11-2019, 10:22 AM
Canadian_JOY Canadian_JOY is offline
 
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Bruno - at this stage in the game, for Canadian operators, I recommend installing a 1090ES solution. This brings many benefits in Canada and allows us to play in the US ADSB-mandate airspace if equipped with an appropriate position source to supply the full ADSB-out data stream.

Since this topic started out talking about Aireon, let's come back to that topic. I recommend 1090ES because Aireon has agreed to make available to national air service providers (NavCanada, for instance), upon request, last ADSB position/velocity data for an aircraft, typically an overdue aircraft. I see 1090ES as one more tool in my arsenal of tools to assist in Search and Rescue, should I ever need it.

While equipping with a UAT device will suffice for the US ADSB-OUT mandate, it brings zero benefits while flying in Canada. 1090ES brings benefit while flying in Canada and in the US. Makes the decision pretty much a no-brainer for me.
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  #13  
Old 02-11-2019, 10:36 AM
RandyAB RandyAB is offline
 
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Quote:
Originally Posted by Canadian_JOY View Post
Bruno - at this stage in the game, for Canadian operators, I recommend installing a 1090ES solution. This brings many benefits in Canada and allows us to play in the US ADSB-mandate airspace if equipped with an appropriate position source to supply the full ADSB-out data stream.

Since this topic started out talking about Aireon, let's come back to that topic. I recommend 1090ES because Aireon has agreed to make available to national air service providers (NavCanada, for instance), upon request, last ADSB position/velocity data for an aircraft, typically an overdue aircraft. I see 1090ES as one more tool in my arsenal of tools to assist in Search and Rescue, should I ever need it.

While equipping with a UAT device will suffice for the US ADSB-OUT mandate, it brings zero benefits while flying in Canada. 1090ES brings benefit while flying in Canada and in the US. Makes the decision pretty much a no-brainer for me.
I think 1090ES generally should be a no brainer, especially for those of us outside the CONUS. I guess the question remains is how well a bottom mount antenna alone will work. Until it’s up and running I guess there is no telling for sure. I received a reply from a Garmin staring only bottom mount was necessary because the system is ground based. Obviously he didn’t read the part in my inquiry that specifically asked about the system outside the US that is based on satellite.
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  #14  
Old 02-11-2019, 10:44 AM
unitink72 unitink72 is offline
 
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Default Dynon silence

I had posted a question about antenna diversity on dynon's forums about a month or so ago and got zero replies. The CAA will probably have to decide what the rules are first and then the avionics manufacturers will react.
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  #15  
Old 02-11-2019, 10:56 AM
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Thermos Thermos is offline
 
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Quote:
Originally Posted by RV-4 View Post
Do Garmin or someone else have a TXPR that work on 978MHZ & 1090 MHZ making it a single box for both country??
I've installed a Garmin GTX-45R remote-mount transponder with my G3x system. It does ADS-B Out on 1090 MHz and receives ADS-B In on both 1090 and UAT. The GTX-345 is a panel-mount version of the same box.

With a 1090-transmit 1090/UAT-receive transponder you should be compatible everywhere 1090 is required but still be able to get the benefits of FIS-B weather products when you're in the US. An added benefit in the US is that you don't have to carry two transponders as the FAA still requires us to have ATCRBS Mode A/C capability. A 1090 ADS-B transponder is (or should be) backward-compatible with Mode A/C, but using UAT for ADS-B Out means keeping a separate ATCRBS box.

HTH

Dave
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Last edited by Thermos : 02-11-2019 at 11:08 AM.
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  #16  
Old 02-11-2019, 11:29 AM
Ralph Inkster Ralph Inkster is offline
 
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I was told a few days ago by an avionics shopthat the 345 doesn’t support diversity. You have check each model to determine if it would. He also mentioned that Garmin doesn’t offer a top antenna yet.

uAvionix at Copperstate mentioned that a recent meeting with Nav Canada & TC stated adsb is mandated for operators over 18000ft but (at this time) don’t have plans to mandate GA below 18000ft.

The general situation seems pretty murky in Canada and I’m still inclined to continue to use legacy equipment and find the cheapest effective adsb in/out add on to comply when travelling south.
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  #17  
Old 02-11-2019, 11:49 AM
BobTurner BobTurner is offline
 
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Quote:
Originally Posted by RV-4 View Post
Hello Gents

Do Garmin or someone else have a TXPR that work on 978MHZ & 1090 MHZ making it a single box for both country??

Makes you wonder why the US didn't go with a 1090 MHZ system from the start like the rest of the world...

Thanks

Bruno
The situation is complicated. The FAA designers feared frequency congestion if everyone was on one frequency. So they mandated 1090 over 18,000’. That essentially forces the airlines to 1090. For below 18,000’ you have a choice of 1090 or 978. The designers *thought* 978 (UAT) would be less expensive so GA would go that route, and they’d end up with a 50-50 split. It has not worked out exactly that way, I believe there are more aircraft on 1090. For ADSB-in, there are many receivers that listen on both frequencies. If you have a single frequency receiver, then you must rely on receiving a ground station to get the traffic on the other frequency. For ADSB-out, the FAA has mandated that you may not use both frequencies (that would defeat the purpose), you have to choose one.
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  #18  
Old 02-11-2019, 11:50 AM
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Thermos Thermos is offline
 
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Quote:
Originally Posted by Ralph Inkster View Post
I was told a few days ago by an avionics shopthat the 345 doesn’t support diversity. You have check each model to determine if it would. He also mentioned that Garmin doesn’t offer a top antenna yet.
That's correct, it doesn't. Diversity isn't required in the US for the ADS-B transponder class specified for light GA, even when used above 18,000 feet.

There's no ADS-B mandate yet in Canada (Canadian folks correct me if I'm wrong) so by definition there should be no *requirement* as of now for diversity on 1090. Whether or not it'll be required if/when Nav Canada goes to Aireon for ADS-B information is a question for Transport Canada.

More info here - https://www.aopa.org/news-and-media/.../pilot/pe_adsb

Dave
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Last edited by Thermos : 02-11-2019 at 12:01 PM.
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  #19  
Old 03-31-2019, 09:26 AM
RandyAB RandyAB is offline
 
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https://www.garmin.com/en-US/blog/av...-transponders/

For those of us outside the US reliant on the space based system, which I think is going to be awesome, this new announcement by Garmin is very welcome news.
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