Re: ARLA/CLUSTER: 13.000 antenas para escutar o céu entre 20 a 80 MHz

[Carlos Mourato]

Ainda vão é escutar PLCs e depois dizem que é uma emissão codificada que vem
do espaço!.eheheheh!
73 de CT4RK



2009/8/26 João Gonçalves Costa <joao.a.costa  ctt.pt>

>   Long Wavelength Demonstrator Array
>
> *ScienceDaily* reports that scientists from NRL's Space Science and Remote
> Sensing Divisions have generated the first scientific results from the *Long
> Wavelength Demonstrator Array* (LWDA).
>
> The measurements were obtained during field tests and calibration of two
> prototype antennas for the much larger Long Wavelength Array (LWA), which
> will eventually consist of nearly 13,000 similar antennas.
>
> Utilizing radio emissions from the approximately 300 year-old Cassiopeia A
> (Cas A) supernova remnant (SNR)—one of the brightest astronomical radio
> sources in the sky—to establish baseline measurements, NRL scientist and
> National Research Council (NRC) postdoctoral fellow Dr. Jake Hartman
> utilized the LWDA to confirm and extend a study initiated by fellow NRL-NRC
> postdoc Dr. Joseph Helmboldt.
>
> Once completed, the LWA will provide an entirely novel view of the sky in
> the radio frequency range of 20-80 MHz, currently one of the most poorly
> explored regions of the electromagnetic spectrum in astronomy.
>
> The LWA will be able to make sensitive high-resolution images, scanning the
> sky rapidly for new and transient sources of radio waves that may represent
> the explosion of distant massive stars or detect emissions from planets
> outside of our own solar system and previously unknown objects or phenomena.
>
> Read the full story *Scientists Make First Discovery Using **Revolutionary
> Long Wavelength Demonstrator Array* at
> http://www.sciencedaily.com/releases/2009/08/
> 090818150031.htm
>
> ScienceDaily
> http://www.sciencedaily.com/
>
>  Thanks to *George Boorer ZL3PN* for spotting this item
>
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>
>


-- 
Best 73 from: regards from: CT4RK Carlos Mourato - Sines - Portugal

Save the Radio Spectrum! Eliminate Broadband over Power Line. Salve o
espectro electromagnético!. Não use a rede electrica para transmitir dados.
Os "homeplugs power line" e a tecnologia "power line" causa fortes
interferencias noutro serviços sem voce se aperceber. Diga não à tecnologia
power line. Proteja o ambiente
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