[Milsurplus] WOTAN SYSTEM request of infos

[federico]

Thanks Mack,
            I found this :

Summary:The WOTAN technique to estimate oceanic winds from underwater ambient
sound developed in the FASINEX experiment is evaluated using measurements from
the Surface Wave Dynamics Experiment (SWADE). The WOTAN was deployed from the
Minimet buoy, MET-3, which was part of the SWADE array, and carried sensors
for measuring the surface meteorology with sufficient accuracy. The WOTAN
sensor was located at a depth of 513 m and recorded ambient noise levels at 11
frequencies in the range 3-25 kHz every 7.5 minutes for over six months. These
noise sound spectrum levels are compared with the observed buoy wind speeds
and other computed wind variables to establish frequency and wind speed
dependencies. The ambient sound timeseries are first screened to eliminate
contamination from shipping and precipitation (rain) noise. This quiet data
set is then standardized to 1 m depth using site and frequency-dependent
correction factors. The variation with wind speed of the sound spectrum level
at 1 kHz and the spectral slope is further examined. Linear and quadratic
relationships between noise level and wind variables are derived. These
relationships are then inverted for estimating the wind variables using the
noise spectrum and pressure levels. Statistical comparisons are made between
the WOTAN derived estimates and the buoy observations. Differences between the
FASINEX and SWADE algorithm are also examined

but I beleve that the WOTAN SYSTEM that I found was (or is) emploied in
military environment as HF rapid deploynent system.

Thanks anyway. 73 de Federico IZ1FID



Federico BALDI
-Direttore S.C. Malattie Metaboliche e Diabetologia A.S.L. 11 - Vc
-Direttore del Dipartimento per la Cura delle Malattie di Lunga Durata
 A.S.L. 11 - Vercelli



Visit my website entirely devoted to military radio, military handguns 
and aircraft clocks :

www.dottorbaldi.it/militaryradio

---------- Original Message -----------
From: Mack Rogers <n4vgb at yahoo.com>
To: federico <baldi.1 at www.dottorbaldi.it>
Sent: Sun, 1 Jun 2008 15:49:18 -0700 (PDT)
Subject: Re: [Milsurplus] WOTAN SYSTEM request of infos

> WOTAN stands for Weather Observation Through Ambient
> Noise. I believe there is also reference to WOTAN in
> some radio navigation systems. I have no specific
> knowledge of either system.
> 
> Mack Rogers
> N4VGB
> 
> --- federico <baldi.1 at www.dottorbaldi.it> wrote:
> 
> > Hi to All,
> >                anybody have any information about a
> > system marked WOTAN made by Harris with : one
> > PRC-138, one PA 125 W (embedded in a plastic case)
> > plus a PS, a shielded computer, an RF-382 AATU, a
> > coil of 50 meters of coax and control cable for
> > tuner, and an antenna RF-1912 Fan Dipole ? 73 de
> > Federico IZ1FID
> >  
> > >
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> >
------- End of Original Message -------