Tasmanian multilateration
Join Date: Sep 2000
Location: Darraweit Guim, Victoria
Age: 65
Posts: 509
Likes: 0
Received 0 Likes
on
0 Posts
the experts tell me that it is really easy to spoof a false position with ADS-B
Join Date: Feb 2001
Location: They seek him here, they seek him there
Posts: 141
Received 0 Likes
on
0 Posts
Come clean, Mr Smith. Why are you so against 1090ES ADS-B?
I make no observation as to whether that is a good or bad thing other than to say that the wider industry may miss out on some significant safety or economic benefits for the sake of reducing the installation costs for the GA/VFR fleet.
Dick,
My experts tell me that Multilat could prove to be a horrendously expensive piece of surveillance infrastructure relative to ADS-B.
But my guess is that you don't really care about that to the extent that VFR traffic does not pay the enroute charges that finances the investment in ground infrastructure.
As long as all you need to access multilateration is a transponder and don't have to pay for the extra ground equipment you don't really care do you?
Join Date: Oct 2002
Location: ɐıןɐɹʇsn∀
Posts: 1,994
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Dick Smith
By the way, I’ve been away – driving from Moscow to Kazakhstan.
p.s why would anyone intentionally "spoof" a false position?
Don Quixote Impersonator
Join Date: Jul 1999
Location: Australia
Age: 77
Posts: 3,403
Likes: 0
Received 0 Likes
on
0 Posts
GaryGnu
prolly just trying to claw back some ground from the really dumb "pay your own way have your own say" mantra he and his cohort stiffed GA with.
I see the US Reps have sent or are sending the FAA "user pays" bill to the dustbin of history. At least their GA reps represent, well GA not just the terry towellers.
prolly just trying to claw back some ground from the really dumb "pay your own way have your own say" mantra he and his cohort stiffed GA with.
I see the US Reps have sent or are sending the FAA "user pays" bill to the dustbin of history. At least their GA reps represent, well GA not just the terry towellers.
Join Date: Nov 2004
Location: Orstralia
Posts: 171
Likes: 0
Received 0 Likes
on
0 Posts
My experts tell me that Multilat could prove to be a horrendously expensive piece of surveillance infrastructure relative to ADS-B.
All at a fraction of the cost of installation and a minute fraction of the cost of maintenance of a SSR. And only three times the ground cost of the 6 ADS/B sites I mentioned for much more capability. While it will not prevent ATC having Dick spoof on their screens (however unlikely that is) it would provide a cross check.
I believe another MLAT is now planned for Sydney to replace the PRM!
ADS-B and Multilateration Optimization Patent Awarded to Era
(Reston, VA., August 30, 2007) -- Era has been awarded a patent covering fundamental attributes of network-centric management of surveillance system-wide information, including distributed timing and surveillance data bandwidth management. The patent includes methods of ADS-B tracking and multilateration, where aircraft transponder signals are received over local, regional and wide-area networks using a number of receivers designed to filter redundant transponder signals, time-stamp filtered signals and forward surveillance information to air traffic control and other users.
Conventional triangulation techniques on an aircraft's transponder signal have required decoding real-time transponder replies at several locations, time-stamping them and sending them to a central location for processing. Because each sensor has to time-stamp individual transponder signals, a relatively high bandwidth communications medium was required between each remote sensor and the central server. This is generally viewed as a barrier to large-scale implementation of wide area surveillance networks, especially in more remote regions where there may be limited communications infrastructure.
Era's patented techniques alleviate this problem, allowing users to manage massive amounts of real-time aircraft transponder information and use a variety of existing datalink and network implementations with various bandwidth constraints. Furthermore, the technique accommodates both passive and active surveillance systems for air traffic control, military, homeland security and commercial airport applications.
Era's solutions include hardware, software and systems for correlating flight identification data with aircraft registration numbers, including correlation of flight identification data from aircraft communications with the data from Mode S and ADS-B transponder transmissions. For some applications, this creates the same data as an air traffic controller would see, without the need for any active interrogation or connection to any Air Traffic Control equipment.
"Once again, Era has introduced truly ground-breaking solutions to facilitate the practical and early implementation of proven innovative surveillance solutions that will provide all users with tangible benefits," said Dave Ellison, President and CEO of Era Corporation. "This new technology allows for a myriad of opportunities, ranging from improving air traffic control efficiency and homeland security applications to aircraft noise mitigation and will help better serve all of our customers."
Source : Era Corporation
Conventional triangulation techniques on an aircraft's transponder signal have required decoding real-time transponder replies at several locations, time-stamping them and sending them to a central location for processing. Because each sensor has to time-stamp individual transponder signals, a relatively high bandwidth communications medium was required between each remote sensor and the central server. This is generally viewed as a barrier to large-scale implementation of wide area surveillance networks, especially in more remote regions where there may be limited communications infrastructure.
Era's patented techniques alleviate this problem, allowing users to manage massive amounts of real-time aircraft transponder information and use a variety of existing datalink and network implementations with various bandwidth constraints. Furthermore, the technique accommodates both passive and active surveillance systems for air traffic control, military, homeland security and commercial airport applications.
Era's solutions include hardware, software and systems for correlating flight identification data with aircraft registration numbers, including correlation of flight identification data from aircraft communications with the data from Mode S and ADS-B transponder transmissions. For some applications, this creates the same data as an air traffic controller would see, without the need for any active interrogation or connection to any Air Traffic Control equipment.
"Once again, Era has introduced truly ground-breaking solutions to facilitate the practical and early implementation of proven innovative surveillance solutions that will provide all users with tangible benefits," said Dave Ellison, President and CEO of Era Corporation. "This new technology allows for a myriad of opportunities, ranging from improving air traffic control efficiency and homeland security applications to aircraft noise mitigation and will help better serve all of our customers."
Source : Era Corporation
