[acao-it] Fwd: Re: ACAO Tracking Protocol

[Daniele Orlandi]

Questa è la risposta di Thomas, appena ho un po' di connettività gli rispondo


  Daniele Orland

Sent with AquaMail for Android
http://www.aqua-mail.com


--- Forwarded message ---
From: Thomas Sevaldrud <thomas at silentwings.no>
Date: 5 July 2015 13:59:30
Subject: Re: ACAO Tracking Protocol
To: Daniele Orlandi <daniele at orlandi.com>
CC: Ola Røer Thorsen <ola at silentwings.no>

Hi Daniele,

Thanks for that, that was fast, looking forward to try the server. We will
of course test it thoroughly and give you feedback :-)

The original plan as I understood it was that we would work out a new
protocol in cooperation with FAI which I presume would involve you in this
work, but I don't think anyone really got started on this activity. We have
tried to push a little on this a couple of times the past months, but we
have frankly been way too busy with the viewer to take any leading role in
this. We have just said that we need an interface similar to what we have
and that we'd work from that assumption.

I'll answer your questions below,


> Dear Thomas,
>
> I carefully read your email and I would like to answer you few clear
> points:
>
> - The protocol specification I sent you is what we can _guarantee_ to be
> functional because it is the protocol over which we base our services
> and it is being used for long time.
>
> - AFAIK, we were not expected to provide data in any other format or
> mean beside the protocol we were already using.
>
> That said I understand that it would be much easier for you if we
> provide the tracking data with the protocol specification you sent me,
> thus, I’ve implemented it on our system.
>
> However I’m required to stress you that it will be your responsibility
> to test it thoroughly and confirm that it is fully functional well in
> advance.
>
>
> I will set up an URL accessible from the Internet so that you will be
> able to test it remotely.
>
> Now some questions:
>
> - Who will run the software during the competition? You directly?
>

We will be there the first weekend + a few days into the competition. After
that I think Brian will make arrangements for someone else to run it.


> - Is a copy of the viewer available that I can use to see how it will
> work?


We have an alpha version of the viewer out. I'll send you a separate email
with instructions for downloading and running that later.


> Our system receives and sends fixes every second, in real time with no
> delay, it does not do any queueing, so, every fix that is not received
> is lost. You should expect fixes missing randomly or for long time due
> to radio reception quality.
>

This could be a problem... One important feature of the system is that it
shows a leaderboard with the current standings during the race. If we lose
fixes inside waypoint sectors this will of course mess up the scoring.

The previous systems we have worked with have buffered data on-board and
pushed everything when they got back in an area with reception, but I guess
that is not an option here since each FLARM just sends blindly right?

Also, the server needs to store all fixes from all the gliders, so that
when a viewer connects for the first time, it gets the entire flight (up to
the current time). Again, this is to do the scoring so that we know how far
the glider has gone when we start the application. This also gives us the
possibility to move back and forth in the track inside the viewer to
visualize events earlier in the flight.

Best regards,
Thomas
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.acao.it/pipermail/it/attachments/20150706/da94cacd/attachment.html>