Hi Wolf,
not only hams know that your software is outstanding.
Although I wouldn't be surprised if at least one of the specialist on board of
the Ocean Shield is a ham.
73, Rik ON7YD
________________________________________
Van: [email protected] [[email protected]]
namens wolf_dl4yhf [[email protected]]
Verzonden: maandag 7 april 2014 17:44
Aan: [email protected]
Onderwerp: Re: LF: SpecLab helps plane hunt
Hi Pete, Mike, Alan, and all,
I was also sceptic about the first "detection" (by the Malaysian or was
it a Chinese search vessel).
But to me, the spectrograms taken by the US team aboard Ocean Shield is
convincing.
The screenshot at ABC is a bit blurred but one can nicely see the
"bipp-bipp-bipp-..." periodic ultrasonic bursts (aka "pings"), just as
they should look like:
http://www.abc.net.au/news/2014-04-07/ocean-shield-detects-possible-mh370-black-box-signal/5372616
It's not just a wobbly carrier that comes and goes. In slow-CW-terms, it
would be an "outstanding signal". The signal is picked up by a towfish
pulled on a long cable, to get away from the QRM (vessel) as far as
possible.
Now keeping fingers crossed that the batteries last a bit longer than
specified. The experts say the pinger's battery usually degrades slowly,
instead of "going QRT" abruptly.
73,
Wolf DL4YHF .
Am 07.04.2014 16:16, schrieb M0FMT:
> Hi all
>
> If their kit is that shaky do
> they understand that EM "breakthrough" into the
> long trailing antenna like cables from the sensors at 37.5
> kHz is possible? i.e. Powerful VLF TX operating in that
> frequency range because of its sea penetrating properties
> for very purpose of communicating with submerged Naval
> Submarines. Or is the acoustic PING encoded to avoid this
> confusion?
>
> 73 es GL Pete
> M0FMT IO91UX
>
> --------------------------------------------
> On Mon, 7/4/14, Mike Dennison <[email protected]>
> wrote:
>
> Subject: LF: SpecLab helps
> plane hunt
> To: [email protected],
> [email protected]
> Date: Monday, 7 April, 2014, 14:15
>
> I have been amazed at the
> low tech
> methods apparently being used in
>
> the hunt for the 'pings' from the
> black box of the missing
> Malaysian
> plane.
>
> But
> today the BBC lunchtime news showed the Ocean Shield
> search ship
> using
> DL4YHF's Spectrum Laboratory, presumably with a 96kHz
> soundcard
> as its input -
> exactly the kit used for the recent amateur
>
> radio
> transatlantic tests on 29kHz.
>
> Well done, Wolf. Your
> excellent software may help solve this
>
> mystery.
>
> de Mike,
> G3XDV
>
>
>
>
>
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