FR24

[SpringHeeledJack]

From time to time I tune into the FR24 website to see what is flying around the skies and since my last visit a few weeks ago it seems that bizjets(as in type) and small propeller aircraft are now showing up, whereas before they showed up with an homogenous form . The bizjets show no route information, or for that matter registration. Is this because an owner of such an aircraft decided to sue them for showing such things and now they're being more circumspect ? If so, those that might have the where with all would still be able to 'see' where such craft were going rendering such tactics worthless.

[HEATHROW DIRECTOR]

Bizjets don't always show location on SBS. I was told it was because the owners didn't want their locations in the public domain. Many more aircraft are now showing on FR24 because of something called MLAT, but I've no idea what it is or how it works.

[750XL]

How it works - Flightradar24.com - Live flight tracker! (http://www.flightradar24.com/how-it-works)

In short:



MLAT requires 4 receivers and the coordinates of each receiver
All 4 receivers must be calibrated to the exact same time
When all 4 receivers pick up the ADS-B signal, they are able to fairly accurately work out the aircraft position based on the time difference of the receiver picking up the signal
The more receivers, the more accurate the position


PlanePlotter has been doing this quite effectively for a number of years

[DaveReidUK]

When all 4 receivers pick up the ADS-B signalStrictly speaking, it's a Mode S signal (not ADS-B) being transmitted by the aircraft that's being multilaterated by the network of receivers.

If the aircraft was sending ADS-B, then there wouldn't be any need to use multilateration to determine its position.

[Stu666]

Very welcome addition to FR24.

Seems to work well for the larger stuff like FlyBe's Dash-8s, but I'm finding a lot of the smaller prop stuff is giving wildly inaccurate positions and heights. I'm also still seeing the odd bizjet going over with no sign of it on FR24.

[Twitcher]

It now shows a lot more military activity too .. both UK and US aircraft, sometimes even with Registrations.

[Big Eric]

"It now shows a lot more military activity too .. both UK and US aircraft, sometimes even with Registrations. "

Yes, but some of the information is horribly wrong and needs taken with a huge pinch of salt !

[uksatcomuk]

The key to mlat coverage is a good network of ground stations...this allows tracking at much lower levels.

PlanePlotter has about 1000 ground stations worldwide with 300 or so across the UK alone. Consequently it can track down to a few hundred feet ....or lower

The animation below shows yesterdays Vulcan sortie
.
The network has been running for about five years.Eventually as FR24s ground stations increase in numbers similar coverage will be possible.

John
PlanePlotter Support
**PlanePlotter the first and only multilateration network software
for aviation enthusiasts.
PlanePlotter from COAA (http://www.coaa.co.uk/planeplotter.htm)



http://i43.tinypic.com/2zgaro2.jpg

[SpringHeeledJack]

Is there something up with FR24 at the moment ? All I'm getting is the maps, but no little yellow aeroplane thingies flitting around the screen. ;)

[srobarts]

Working fine for me, loads of little yellow aeroplane thingies flitting around the screen.
Try restart on your browser?

[coldair]

Jack,

it only works with Firefox on my computer.

[SpringHeeledJack]

Thanks for the replies, however it doesn't work on 3 different browsers, so either I've inadvertently done something (v possible :p) or some other external issue is affecting it.



SHJ

[treadigraph]

Working OK for me on Chrome...

[750XL]

Have you accidentally applied a filter?

[LiamNCL]

http://s17.postimg.org/6q157zz2n/image.jpg

Nice parking by EK35 ;)

[treadigraph]

I keep noticing different Dutch registered gliders and, yesterday, a Cameron Hot Air Balloon in the same position just off Bridlington. Never move and obviously spurious - but what causes them? Not there as I post...

Occasionally see ghost aircraft pop up over SE England - recently it's been Bluebird 737 TF-BBF (or H?) or an Atlantic Airways ATP (G-BTP?), both of which "hover" at the location in question and last year the Indian A320 which had recently crashed kept popping up.

[DaveReidUK]

Nice parking by EK35Hmmm. Track 120°, speed 0 - that's a neat trick.

[coldair]

Dave,

I think that means he has stopped. i.e. Landed and that is the directon he is pointing.

I could be wrong though, I am sometines ;-)

[DaveReidUK]

I think that means he has stopped. i.e. LandedLet's hope so, given his location. :O

and that is the direction he is pointing.With his tail sticking out over stand 10, and his wingtip embedded in the pier? I think not.

[SpringHeeledJack]

Blimey! Every week a new addition and/or change.

Propeller driven craft galore, even the lumbering AN-12's as they drone across Europe. Bizjets no longer identified other than type and height, and many other aircraft only showing a partial 'trace' of the direction they came from. The best one HAS to be ground vehicles, noted at LGW this afternoon, including the trace of their route around the airside part of the airport :}



SHJ

[Burnie5204]

Something you may soon see for EMA Ground Vehicles too if the rumour I hear about doing another trial of Ground Vehicle Transponders when they go to E-FPS in ATC comes to fruition

[treadigraph]

even the lumbering AN-12's

Yeah, head a lovely deep drone while out cycling near Biggin on Monday afternoon - quick glimpse of a dark blue underside, checked when I got home, Ukrainian AN-12. Heard it again late last night, same aircraft...

[take-off]

Has anybody clicked on the airports for the departures and arrivals ,as all of Thomsons flights are showing as Transavia FRance as the airline, doesnt matter which airport you click on , and Thomas Cook is coming up as Air Tanzania :E:sad:,, Easyjet , Jet2 etc.. are all showing as respective airlines, Just these two are different. Is it just glitch ? Just seems strange

[take-off]

Also today's Las Vegas flight on FR24 departures from Manchester is showing an AIR Tanzania 757????:eek: Im sure thats wrong...but stranger things have happened :}

[Evanelpus]

Take Off, I think your second post answered your question, re Air Tanzania.

I've recently changed phones from a Nokia 800 to a Samsung S4, so I bought the FR24 APP. It's brilliant on my new phone (couldn't have it for my old one because I only had Windows 7) and I have purchased the in APP timetables which work a treat.

[take-off]

Yes well I thought that , but its been on the desktop version, showing thomson and Thomas cook now since the update as wrong airlines and that's been a few weeks ago now. If you click on the actual plane you get the right details.

[HEATHROW DIRECTOR]

If anyone has a few minutes to spare have a look on FR24 around 09:55Z for BPA9836, Blue Panorama B767 apparently inbound to Brize. On my PC it landed well south of Brize!

[DaveReidUK]

If anyone has a few minutes to spare have a look on FR24 around 09:55Z for BPA9836, Blue Panorama B767 apparently inbound to Brize. On my PC it landed well south of Brize! No different from BA's older 767s, which also have inertial-powered ADS-B and frequently "land" in Stanwell and Harlington.

Unfortunately FR24 doesn't capture the parameter that aircraft send which indicates the maximum potential error magnitude in the positional data (can be as much as 10nm).

[Charley B]

Landed well south on my PC too Bren...definately a missed approach!!;)

[DaveReidUK]

Landed well south on my PC tooI suspect that FR24 displays the same track on everybody's PC. :O

[KBPsen]

Really, who gives a sh..

[DaveReidUK]

Really, who gives a sh..You mean apart from the FAA, who are betting the ranch on ADS-B? :ugh: