Mike wrote - I also have a nagging suspicion that ADSB will be shown to be a 1990 solution to a 21st century problem
Yep, like everything in aviation, by the time the ideas become standards it's all outdated. Also we started with an aged system (1090Mhz high power, large bandwidth, pulse nightmare, hugely inefficient ) instead of designing a digital network which could have used existing infrastructure as the backbone for information updating and when out of range was automatous in its reporting. Anyway we battle on with what they want. Nigel Andrews From: Aus-soaring [mailto:[email protected]] On Behalf Of Mike Borgelt Sent: Thursday, 11 February 2016 4:02 PM To: Discussion of issues relating to Soaring in Australia. Subject: Re: [Aus-soaring] Aero Glass BVLOS Of course not everything that flies is going to have ADSB. Good luck getting the birds to fit them. I've lost count of the number of times I've seen and noted birds from the BD-4 while in cruise and got ready to take evasive action. Nigel correctly points out that 1090MHz is crowded which is why the US has gone to 978MHz for the smaller aircraft at lower altitudes and a network of ground stations to link to the 1090 people. These are also used to give inflight weather updates etc. Something we already have in OZ with Oz Runways and AvPlan everywhere in cell coverage. Both brilliant programs giving outstanding situational awareness. I also have a nagging suspicion that ADSB will be shown to be a 1990 solution to a 21st century problem. Just think how far computers and communications have come since then. Currently ADSB is being used to make Air Traffic control easier. If all aircraft can see each other there isn't all that much need for en route ATC. I read about a simulation where the traffic density was at least as dense as Europe's most crowded airspace and the simulated aircraft just went direct to destination from departure point. There were very few conflicts and they were easily resolved by the flight crews who could electronically see each other. I gather the minor evasive action didn't cause any knock on conflicts either. We should remember that the air is much larger than a computer display, 3D not 2D and aircraft are very much smaller than the size of the symbols on a display. Mike At 12:52 PM 2/11/2016, you wrote: >>BUT, millions is being spent to solve this. I'm just guessing, but I'd be surprised if the Germans did not spend a bit on their railway signalling and automatic braking system. It works, but not well enough to prevent trains crashing. Anyone who has used a modern computer OS would realise that once you get to a point with any engineered system, whether it be mechanical or electronic or code, where no one person, team, committee can understand the whole, then you get problems. I assume Bronowski was talking about gliding when he wrote "The personal commitment of a man to his skill, the intellectual commitment and the emotional commitment working together as one, has made the ascent of man." D _______________________________________________ Aus-soaring mailing list [email protected] http://lists.base64.com.au/listinfo/aus-soaring Borgelt Instruments - design & manufacture of quality soaring instrumentation since 1978 www.borgeltinstruments.com <http://www.borgeltinstruments.com/> tel: 07 4635 5784 overseas: int+61-7-4635 5784 mob: 042835 5784 : int+61-42835 5784 P O Box 4607, Toowoomba East, QLD 4350, Australia
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