Long Marston Test 17 October

[thearb]

Very successful test today with 5 pilotaware equipped aircraft. None of the power dropouts whatsoever that affected the June tests. Screen shots will be going up on this thread later this evening, many thanks to Ian Fallon, Bryan, Alan Walker, Lee Moore and Keith Vinning.

[thearb]

Alan Walker departing, rest lining up:

https://www.dropbox.com/s/sr369oplgxqzr9n/2015-10-17%2013.17.18.png?dl=0

2 mins later, note 400FEE now switches to show as G-SARV, note the easyjet in bottom left in third link, proving ads-b feed also operative.

https://www.dropbox.com/s/zpxbigcv2aooo9s/2015-10-17%2013.19.13.png?dl=0
https://www.dropbox.com/s/o2kl09vcat83j6q/2015-10-17%2013.19.47.png?dl=0
https://www.dropbox.com/s/mx1eo4ovhytnxb8/2015-10-17%2013.20.09.png?dl=0

2 mins later:

https://www.dropbox.com/s/i1slodk6xq8ch66/2015-10-17%2013.21.03.png?dl=0

3 still in vicinity 5 mins later:

https://www.dropbox.com/s/trt9t0ria1e0d5o/2015-10-17%2013.31.34.png?dl=0

[Mig29fuk]

I have to say that this enthuses me greatly.
I did tests yesterday but with only one aircraft and results were not so convincing.
Weather looks good mid afternoon tomorrow (Sunday 18th) so I think I'll try and get airborne and persuade someone to fly with my spare Unit too.
Regards and Tanks to all concerned today.
Gerry

[rg]

This looks good. ..where were the units located, power supplies used,  etc etc  

[SteveN]

Don't know what others thinks but I reckon using tail number rather than hex code makes a lot more sense for us.  SSR is never going to see us anyway..

It also allows us to differentiate PAW from ADS-B

[thearb]

Yes, all reported altitudes look correct against the ground station (me in green), so that bug seems fixed.

Many of the pilots today commented on the fact that they often couldn't see the aircraft that were showing on the screen, even when they knew where to look outside the cockpit. Explains why the skies seem busier from the ground than when in the air, often we are just oblivious to close aircraft.

Standard PAW unit powered off aircraft AUX USB outlet, sited on coaming.

[The Westmorland Flyer]

Don't know what others thinks but I reckon using tail number rather than hex code makes a lot more sense for us.  SSR is never going to see us anyway..

It's an interesting question. I can see why we need to have the ICAO code programmed into PAW so we don't see our own transponder but there's no particular reason for the P3i side to use it. The only problem is that the aircraft registration can be up to (I think) 6 ASCII characters, which is six bytes vs. the three that the ICAO code requires. There isn't room in the 24 byte P3i packet as it stands.

[Admin]

In the p3i packet the icao code is used as a unique identifier.
We need this in order to discriminate between multiple received packets

Thx
Lee

[Paul_Sengupta]

So, this being a bit late at night, can someone summarise this as to how far away the P3i data could be seen from the ground and from other aircraft? 

[Alan Walker]

I think we collectively agreed that it was in the order of 5 miles air to air.

[SteveN]

An Avidyne TAS600 sees 7 miles so 5 not bad for £100 

[The Westmorland Flyer]

In the p3i packet the icao code is used as a unique identifier.
We need this in order to discriminate between multiple received packets

Understand the need for a unique identifier but the aircraft call sign is also unique so I wondered if, field size apart, it could perform the same task.

[SteveN]

If we DO want longer range (not convinced) I guess we could fit a ground plane?

Taken from the DIY OGN tracker build page. They are working 868.3Mhz

If using a plastic box then add 2 or 3 strips of Aluminium or Copper tape each approximately 85mm long from the
SMA connector to act as ¼-wave ground planes

Copper tape on Ebay

[the_top_pilot]

Chaps.

How do you change from Hex code to Reg (like GSARV Has). I have tried in the configuration page but the minute I press save it auto generates a hex code again?
Any clues Please

Steve

[Admin]

Chaps.

How do you change from Hex code to Reg (like GSARV Has). I have tried in the configuration page but the minute I press save it auto generates a hex code again?
Any clues Please

Steve

Hi Steve,
This is nothing to do with PilotAware, we suspect SkyDemon is performing a lookup of the HEX code to REG, I need to check with Tim Dawson. OR, Ian is really pumping out ADS-B without his knowledge !

Thx
Lee