The Pacific: General Aviation & Questions The place for students, instructors and charter guys in Oz, NZ and the rest of Oceania.

ADS-B, Stuff that I have found.

Old 11th Feb 2011, 02:44
  #241 (permalink)  
 
Join Date: May 2009
Location: hot on the heels of worthy targets
Posts: 184
Likes: 0
Received 0 Likes on 0 Posts
That is interesting, and a tad worrying

According to the article, the effective range of these personal jammers is 10's of metres, out to 40 metres!?!? One would assume then they are jamming other nearby automotive and other units as well as the unit being intentionally jammed.

The LoS protections on IFR aviation GNSS systems is one thing, but at the end of an IFR approach in the soup

The FCC and FAA must have/are doing something about it?
The Chaser is offline  
Old 18th Jun 2011, 23:57
  #242 (permalink)  
Thread Starter
 
Join Date: Dec 2001
Location: YMML
Posts: 2,560
Received 5 Likes on 4 Posts
The FCC gives Lightsquared an extention for their final submission on the effects of their proposed 40,000 ground stations on the GNSS.

LightSquared Update

June 16, 2011

LightSquared Update
By Glenn Pew, Contributing Editor, Video Editor

Recent tests have shown that LightSquared's proposed grid of 40,000 wireless network ground stations could interfere with GPS signals, and now the FCC has granted LightSquared a two week extension to file a report on its position. LightSquared's report was originally due Wednesday, the same day the FCC granted the extension. LightSquared spokesman Jim Carlisle said Tuesday that the company underestimated the number of tests that would be necessary to show the network should be allowed. In a letter to the FCC, Carlisle wrote that additional testing "was necessary to permit a proper evaluation of various mitigation options for addressing the GPS receiver overload issue." And that producing a report is really hard.



"Producing a final report is a massive undertaking," Carlisle wrote, citing the multitude of factors involved in the process. The FCC responded by granting the company a new deadline of July 1. In response to the FCC's decision, co-founder of the Coalition to Save our GPS and vice president of Trimble, Jim Kirkland, described his understanding of the process, so far, saying, it's "been a combination of really really bad ideas and slightly less bad ideas." According to Kirkland, too much of the burden of proof has been placed on the companies that could be most affected by LightSquared's network. Said Kirkland, "the FCC should let the private industry return to work and stop squandering resources to solve an unsolvable problem."
]
OZBUSDRIVER is offline  
Old 19th Jun 2011, 08:55
  #243 (permalink)  
 
Join Date: Apr 2003
Location: Somewhere in Indo...
Age: 48
Posts: 166
Likes: 0
Received 0 Likes on 0 Posts
Concerned that Big Brother might be watching?? How about anyone with an internet connection...

FlightTracker - Flight tracker for aircraft transmitting ADS-B
planefinder.net - Real Time Live Air Traffic Flight Radar
Flightradar24.com - Live Flight Tracker!
RadarVirtuel.com

Granted, the coverage is limited to areas where someone has connected up a USB ADS-B receiver to their PC, but as the more major of those links show, the coverage is already fairly significant...

As a sidebar, interesting that the planefinder one has added Volcanic Ash Cloud monitoring as well
HardCorePawn is offline  
Old 28th Aug 2011, 12:53
  #244 (permalink)  
Thread Starter
 
Join Date: Dec 2001
Location: YMML
Posts: 2,560
Received 5 Likes on 4 Posts
ADS-B AC 20-165

ADS-B GPS source Gap
OZBUSDRIVER is offline  
Old 16th Dec 2011, 23:51
  #245 (permalink)  
Thread Starter
 
Join Date: Dec 2001
Location: YMML
Posts: 2,560
Received 5 Likes on 4 Posts
It is very hard to get a link to this work. This study is from ADFA and precis the threat annalysis of ADS-B using TOWS.

Generally, looks at all threats, opportunities weaknesses and strengths TOWS
of ADS-B as a system.

Access to the study is through quickview...so, I hope I am not standing on toes linking this site. Appols in advance:-)

Identification of ADS-B System Vulnerabilities and Threats

Sameer Alam, chief investigator for AirServices wrt ATM systems.
Prof. Hussein Aly Abbass
OZBUSDRIVER is offline  
Old 17th Dec 2011, 05:30
  #246 (permalink)  
 
Join Date: Aug 2009
Location: Australia
Posts: 632
Likes: 0
Received 0 Likes on 0 Posts
Easy PDF link to the above document:

http://bas.scheffers.net/documents/I...%20Threats.pdf
baswell is offline  
Old 17th Dec 2011, 06:43
  #247 (permalink)  
Thread Starter
 
Join Date: Dec 2001
Location: YMML
Posts: 2,560
Received 5 Likes on 4 Posts
Thanks Bas.
OZBUSDRIVER is offline  
Old 20th Dec 2011, 05:25
  #248 (permalink)  
 
Join Date: Aug 2009
Location: Australia
Posts: 632
Likes: 0
Received 0 Likes on 0 Posts
New Advisory Circular 21-45

New Advisory Circular 21-45:

http://casa.gov.au/wcmswr/_assets/ma...tac21-45-1.pdf

The money quote:
8.4.3 Particular navigation packages that do not have a TSOA, but can be demonstrated to achieve the accuracy and integrity values required, may be acceptable to CASA.
So design something to c145 spec, but don't go through the full certification process and still get accepted? (In the same way VHF radios do not need to be TSO, just approved?)

That would be awesome for affordable ADS-B out for VFR aircraft.
baswell is offline  
Old 20th Dec 2011, 08:27
  #249 (permalink)  
 
Join Date: Aug 2008
Location: skullzone
Posts: 144
Likes: 0
Received 1 Like on 1 Post
It would be awesome, if 8.4.3 said "would or will, instead of "may be acceptable"
KittyKatKaper is offline  
Old 6th Jan 2012, 11:00
  #250 (permalink)  
 
Join Date: Nov 2007
Location: Australia
Posts: 2,509
Likes: 0
Received 14 Likes on 14 Posts
Hmmm... some interesting reading ahead..


via the OZBUSDRIVER links to the chief investigator for AirServices wrt ATM systems...


"...Mapping Lessons from Ants to Free Flight: An Ant-based Weather Avoidance Algorithm..."

...Oh oh, maybe not so interesting. Could be some aviation destroying 'global warming' muppetry going on...

"...Estimation of Aviation Emission for Free Flight..."

"...Baseline Aviation Emission Inventory for the Australian National Airspace..."

...







.
Flying Binghi is offline  
Old 9th Feb 2012, 02:15
  #251 (permalink)  
 
Join Date: Feb 2009
Location: dans un cercle dont le centre est eveywhere et circumfernce n'est nulle part
Posts: 2,606
Likes: 0
Received 0 Likes on 0 Posts
Given, I can't believe anything that comes out of Gillard's gob, Conroy and her are touting $6+ million for design and build of two telecommunication satelites for thems folk in the GAFA. This was later reported as being for two second hand, (but state of the art), US satelites.

Is it logical to assume these can be utilised for WAAS?
Frank Arouet is offline  
Old 9th Feb 2012, 02:22
  #252 (permalink)  
 
Join Date: Jan 2008
Location: Australia
Posts: 768
Likes: 0
Received 0 Likes on 0 Posts
Frank, They are KA band Communication birds, only comms transponders on board so they have adequate bandwidth.
T28D is offline  
Old 9th Feb 2012, 02:42
  #253 (permalink)  
 
Join Date: Jul 2010
Location: rangaville
Posts: 2,280
Likes: 0
Received 0 Likes on 0 Posts
28D,

So does that mean they CAN be used for WAAS?
Jack Ranga is offline  
Old 9th Feb 2012, 02:56
  #254 (permalink)  
Thread Starter
 
Join Date: Dec 2001
Location: YMML
Posts: 2,560
Received 5 Likes on 4 Posts
Considering also that we have access to the Japanese MTSAT that already has the gear on board for WAAS. All that is required is the ground network to be surveyed in to supply the the uplink signal to augment the GNSS network for our patch and we are all apples.....question is as always....user pays. Just have to prove a case that precise GPS signals are in the national interest and everyone wins.....fat chance, I am afraid
OZBUSDRIVER is offline  
Old 9th Feb 2012, 06:21
  #255 (permalink)  
 
Join Date: Jul 2010
Location: rangaville
Posts: 2,280
Likes: 0
Received 0 Likes on 0 Posts
mmmm, must be a classified secret?
Jack Ranga is offline  
Old 9th Feb 2012, 10:26
  #256 (permalink)  
 
Join Date: Jan 2008
Location: Australia
Posts: 768
Likes: 0
Received 0 Likes on 0 Posts
Jack, No not for WAAS, only bandwidth for IP Data
T28D is offline  
Old 9th Feb 2012, 19:23
  #257 (permalink)  
 
Join Date: Aug 2009
Location: Australia
Posts: 632
Likes: 0
Received 0 Likes on 0 Posts
Since they have not been launched yet, there is no technical reason a WAAS package could not have been put on there. Same with all the birds Optus launched over the past decade. (Remember, WAAS in the US also runs on commercial broadcast satellites)

They just have not been willing to spend the money. The birds probably aren't the biggest obstacle; it's the dozens of ground stations.

Bring on Galileo!
baswell is offline  
Old 9th Feb 2012, 22:58
  #258 (permalink)  
Thread Starter
 
Join Date: Dec 2001
Location: YMML
Posts: 2,560
Received 5 Likes on 4 Posts
Here, here, Baz! There is a serious lack of forethought in our halls of power. Considering we have some 28 ADS-B receiver stations right across the GAFA, how much extra bandwidth would it need to piggyback the raw data on the feed going back to mummy in BN and ML? Already a reference uplink in CB.
OZBUSDRIVER is offline  
Old 10th Feb 2012, 00:18
  #259 (permalink)  
 
Join Date: Jul 2010
Location: rangaville
Posts: 2,280
Likes: 0
Received 0 Likes on 0 Posts
Ta, understood.
Jack Ranga is offline  
Old 10th Feb 2012, 04:07
  #260 (permalink)  
 
Join Date: Jan 2008
Location: Australia
Posts: 768
Likes: 0
Received 0 Likes on 0 Posts
2 birds serving 300,000 consumers 12mb downlink 1mb uplink depending on contention ratio and transponder capacity there is no potential space on these birds
T28D is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.