[G-BLEW]

I seem to have good 360 degree ADS-B coverage, but nothing at all if I select Mode S, hmmmm…

Ian

[lobstaboy]

... and just to stir it a bit more, try comparing the Vector results for PAW with SE2 in the same aeroplane. Very enlightening.
(this is basically what the article in the LAA mag some time ago did. It was much criticised at the time, but doing it for yourself tends to open your eyes a bit.
Of course they do different things, PAW doesn't do adsb out, but the difference between them on Vector is startling)

[lobstaboy]

G-BLEW wrote:
> I seem to have good 360 degree ADS-B coverage, but nothing at all if I
> select Mode S, hmmmm…
>
> Ian

[usermention=22834]@Rjk983[/usermention] just mentioned that I think...

[Rob P]

I have zero Mode S also. Didn't I read that PAw have disabled this in Vector as it was being swamped?

lobstaboy wrote:
> ... and just to stir it a bit more, try comparing the Vector results for
> PAW with SE2 in the same aeroplane.

Can I borrow your SE2 please?

Rob P

[lobstaboy]

Rob P wrote:
> I have zero Mode S also. Didn't I read that PAw have disabled this in
> Vector as it was being swamped?
>
> Rob P

Yes, on this thread about three posts ago.
Where's your smiley?

[Rob P]

lobstaboy wrote:

> Where's your smiley?

She's at work in Cambridge

Rob P

[lobstaboy]

Rob P wrote:
> I have zero Mode S also. Didn't I read that PAw have disabled this in Vector as it
> was being swamped?
>
> lobstaboy wrote:
> > ... and just to stir it a bit more, try comparing the Vector results for
> > PAW with SE2 in the same aeroplane.
>
> Can I borrow your SE2 please?
>
> Rob P

Let's just say, I really wouldn't bother...

[leemoore1966]

Rjk983 wrote:
> But if you filter it to PAW only on the vector thing you will see that you get very
> few returns from you 3oclock and half seven directions, presumably your wings are
> masking these directions,

Your playing the same game we play internally
Determine if it is internal/external antenna and where the antenna is placed
or what material is used in the airframe

Take a look at a helicopter with an internal antenna and you will see severe masking due to the tail rotor setup
[img]https://i.imgur.com/F0xLHGf.png[/img]

PS, does anyone know how to enable BBcode, it seems to be off permanently

[Shoestring Flyer]

G-BLEW wrote:
> I seem to have good 360 degree ADS-B coverage, but nothing at all if I
> select Mode S, hmmmm…
>
> Ian

I could be wrong but I as I undstood things PAW never has received Mode S?

[Paul_Sengupta]

BB code is temporarily unavailable on the forum while it's updated.

Shoestring Flyer wrote:
> G-BLEW wrote:
> > I seem to have good 360 degree ADS-B coverage, but nothing at all if I
> > select Mode S, hmmmm…
>
> I could be wrong but I as I undstood things PAW never has received Mode S?

Two (or three) different things here.

The vector diagrams are produced by receiving transmissions on the ground stations. They receive Mode S and can multilaterate it to give a position. This can give a diagram for a Mode S emission from an aeroplane, but from the thread I understand in the case of producing vector diagrams this is currently switched off not to overload the system.

PAW itself has always received Mode S, as a bearingless contact, shown as a relative height and an approximate proximity.

With the ground network mentioned above, Mode S is multilaterated and sent back up as a known position contact for PAW users to receive.

[leemoore1966]

Just to complete the topic on Mode-S Vector capability, its actually quite unique

Firstly, can a ground station receive a ping from a Mode-S transponder,
if no, then exit
if yes, then
do we have a position report, and track from either PAW, FLARM, MLAT ?
if no, then exit
if yes, then
record this ICAO/Mode-S position and track

This then builds the database records for that specific ICAO/Mode-S combination

The problem is, it is terabytes of data, and too much to continually store on a long term basis
we may resurrect this with an optimized database structure in the future, but its not at the top of the list right now.

thx
Lee

[seanxair]

Think my coaming mounted Rosetta with stub aerials is working pretty well. All metal tandem aircraft flown solo.

[img]https://i.imgur.com/AJahRT8.png[/img]

[leemoore1966]

Rjk983 wrote:
> Lee, is there a map of current atom ground stations? As per my original
> post we have just set up our external antennas and it would be helpful to
> know which rough area is most likely to give us good all round coverage for
> test flying.
Hi,
This was a snapshot taken in Dec 2021
Thx
Lee
[img]https://i.imgur.com/zbZwA3S.jpg[/img]

[Flyin'Dutch']

Thought there is/was a website with actual live information?

[leemoore1966]

Flyin'Dutch' wrote:
> Thought there is/was a website with actual live information?

I am not sure I understand the question.

The discussion here is about VECTOR, which is an amalgamation of historical performance data, to indicate EC emitter deficiency

What Live information of data are you referring to ?

Thx
Lee