Please let me respond so that I can qualify what I said in the video rebroadcast by the LAA who seemed to think that it was an unbiased presentation.
Thanks @ls8pilot for mentioning 1:07 as I just shuttled to find it and have a listen. I stopped at around 1:01 and heard some absolute garbage about SIL=1 and TCAS which obviously shows a total lack of awareness (so far only ACAS-X has an ADS-B capability but it is CDTI and ATSAW that give the ADS-B In awareness to the big aircraft - obviously the briefer knows nothing about that!). There was no mention of SDA=1 either, which is another critical enabler.
Sorry @GAZNAV this section of the video was after the actual presentation and was the ad-lib section open to unsolicited questions. I was attempting (obviously badly in your humble opinion) to let people know that TCAS 1 will not detect ADSB and that TCA2 will ignore SIL=0 transmissions. You are quite right I did not mention SDA=1 to this 'off the cuff' question. My bad. The issue is that TCAS1 (If that is the correct descriptor) doesn’t use ADSB for detection it uses Modes-S which the majority of GA have when in Controlled Air Space. I think that there was a post that may have been deleted that said that Mode-S was the fundamental technology used by NATS and other ATC national air traffic providers. It seems to have been removed.
I then went on to around 1:05 about some notional ban about using ADS-B below 400ft - totally out of context again. There is absolutely no issue with using ADS-B below 400ft in light aircraft, gliders or helicopters - in fact, how would you take off or land, and you can use it on the ground for situational awareness, and many airports do!!!
Again sorry @GAZNAV the reference I used was to CAP722, Issue 8, I believe, which is regarding drones. Drones generally fly below 400ft and ICAO has prohibited the use of 1090MHz ADSB on DRONES below 500ft. It says so in CAP722. Obviously, I don’t expect ADSB to be banned below 400ft for manned aircraft and would like to make this absolutely clear to anyone who thought that they would have to leave their 1090ES transponder off until they reached 400ft above the ground. If indeed they, like you, did think this. If this is the case I apologise unreservedly.
Then the video goes on about spectrum congestion again without qualifying any of that (incorrect) opinion,
Again sorry GAZNAV. However, you are fully aware of this document which contains the references. This has been referenced several times in this forum.https://www.pilotaware.com/post/pilotaware-and-adsb-out
The important thing is that both CAP722 and the statement from the FAA last December prohibiting the use of ADSB on drones from 2022 is due to the possibility of spectrum congestion. Not my words but theirs.
also saying that ICAO don’t believe in ADS-B. What utter hoop!
Again @GAZNAV answering the question in real-time and then being dissected at leisure can lead to misunderstanding especially when looked for. My position here is not as reported above but that ICAO and the FAA have prohibited the use of ADSB on drones because of the possibility of spectral congestion. The exact words from the CAA in CAP 722 are Under existing arrangements, ADS-B devices exchange information at 1090 MHz. However, this could lead to spectrum congestion in low-level airspace. ICAO has issued a letter to States prohibiting the use of 1090 MHz below 500 feet. The UK is currently exploring the use of 978 MHz for UAS to mitigate the risk of spectrum overloading at 1090 MHz.
Please make up your own mind. The full version of CAP77 is available here.
Then there is an incorrect statement on 978Mhz not being available for use in the UK - OFCOM would be delighted to provide a licence to use it (and have done now twice) - so it is useable if people want to do so.
Again I will qualify your statement so that the readers can understand. 978MHz is available from OFCOM for professional development and testing purposes only apart from its primary use. One has to apply for a developers licence.
and have now been done twice
It is not available for general use as you seem to suggest. Obviously, anyone can receive transmissions on 978MHZ but not transmit.
AS mentioned above by the CAA in CAP722 there is a need to find an alternative protected aviation frequency which could be used for EC on GA and drones that could handle the expected volumes and relieve the anticipated spectral overload of ADSB on 1090MHz using PPM.
I suggested the possible use of 978MHZ to the EASA EC Forum in 2018. 978MHz uses a much better modulation technique than the PPM used by 1090MH which is the heart of the problem. It will, however, in my opinion, take a few years for this to be allocated. If and when it is the manufacturers, including PilotAware, will respond.
Of course if every single tiny quadcopter emitted ADS-B then the frequency would become very congested (although some experimentation by ICAO by using 0.1W of power revealed that it might be workable with caveats).
Might be workable with caveats?
In the presentation, I attempted to be unbiased regarding other technologies. My fulsome praise of Flarm within the EC family was not mentioned in your critique nor was the fact that we assist folks to get ADSB-out very inexpensively using transponders. Nor do you pick up on the statement where I encourage folks to buy whatever electronic conspicuity they want to not just PilotAware, as this involvement will help all to get used to EC and the human factors involved.
I think PAW have produced a seriously impressive receiver capability at an excellent price point, and have some very interesting developments in producing a low cost ‘tactical air picture’ capability. However (what feels to me like) trying to present their transmission protocol in a binary choice manner / dismiss ADS-B all the time does their technical achievements a real disservice; it’s a real shame actually.
I am saddened that you have to say
However (what feels to me like) trying to present their transmission protocol in a binary choice manner
Nothing can be further from the truth. We encourage everyone to choose the EC that suits them as no one size fits all.
Will PilotAware become the universal frequency that everyone uses for EC? I think not.
Will ADSB using 1090MHz become the universal frequency that everyone and everything uses for EC? I also respectfully think not.
It is not a binary choice, it's a personal choice. Please choose the technology that suits you and the way that you fly.
I hope that that has helped to make my views quite clear and addressed any misunderstanding. PilotAware is not against ADSB-out or Mode-S or Mode-C or Flarm or Fannet+. We just want to make sure that everyone can see everything wherever possible.
I look forward to the next LAA Strut presentation where I will try to ensure that I don't say anything that will be so easily taken out of context.