About your setup...Re: [ACARS] New Regs in Almere 030623

Wed, 25 Jun 2003 23:01:31 +0300

Thanks Hans, for your reply.
I believe I got your point.

A brute force probability that your scanner is on right frequency when the 
transmission starts is something like 25%, I believe. But then, maybe the 
missed fraction of the second in the beginning is not that fatal. I have 
never counted how long does it take to send <SYN><SYN><SOH> in ACARS. Was it 
2.4kbps and 8 bits per character? So it wont take long at all.

And no matter what is the probability, you seem to have an exellent hit rate 
anyway.

With regards,
Sam

>From: "Hans Biere" <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: Re: About your setup...Re: [ACARS] New Regs in Almere 030623
>Date: Wed, 25 Jun 2003 18:07:47 +0200
>
> > Just for curiosity, are you scanning all four ACARS frequencies by one
> > scanner only?
> > I would assume that you are losing quite a lot of hits if you did it 
>like
> > that.
>
>Hello Sam,
>
>There are many theorys about this theme and this is my one: Yes, I am
>scanning all four with one! At first: I think the YUPITERU MVT - 7100 can
>handle this without any problem. The only thing that can happen is that 
>when
>there are four messages on the same time on different channels three of the
>four will be missed of course but..... There is a big change (99,99 % I
>think) that a/c are long enough in my area of reception that from all a/c 
>at
>least one mesage of all will be logged and that is enough for me. So, I 
>have
>not ALL the mesages from an a/c but at least one of all I think. Doing so I
>have round 2000 different flights a day; collegues who I know and scanning
>one channel have less then 1000..........And finaly this: if I should 
>switch
>off 136.925 I will miss (almost) all SAS, NorthWest, Delta, Continental....
>If I should switch off 131.525 I will miss verry much KLM, BA, Lufthansa,
>AirFrance.....If I should switch off 131.725 I will miss all JAL and ANA
>(all for exemple).
>
>I hope I have made you clear why I am scanning all four with one! If not,
>you are verry welcome for further asking.
>
>Kind Regards, Hans
>
>
>_____________________________________________
>Acars info and Aircraft ID answers go to: http://www.acarsonline.co.uk
>[email protected]
>http://mailman.qth.net/mailman/listinfo/acars

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