Re: ARLA/CLUSTER: Re: [CT-Com. & Tec.] Tecnologia que remonta à II Guerra Mundial volta a ser usada para apoiar os sistemas de GPS

[Luís Garcia Filipe]

Boa noite.

Fiquei curioso quanto ao sistema que fala, o KISS.

Já procurei na net mas não encontrei...pode dar uma ajuda?

E sim realmente, os novos sistemas, têm falta de uma ou duas redundâncias
que sejam independentes de GPS ou Internet, um autentico calcanhar de
Aquiles.

Pode ajudar Carlos?

73,


CS7AEL

2014-11-04 13:52 GMT+00:00 Carlos Mourato <radiofarol  gmail.com>:

> Ora aqui está uma decisão inteligente. Os sistemas mais antigos, podem ser
> hoje considerados como "arcaicos" pelos mais jovens, que nem sequer
> entendem como funcionavam. No entanto, como eram sistemas bastante mais
> simples e principalmente independentes, a sua fiabilidade era de longe
> superior aos sistemas actuais. Podiam não ter um precisão de 2m, mas os
> 100m na melhor das hipoteses, eram mais que suficientes. Eu continuo a ser
> adepto do "KISS" Antigamente havia uma rede de VHF analógico para
> bombeiros, serviços florestais, ...Uma rede de ondas curtas para PSP, GNR
> etc, e tudo funcionava bem. Hoje existe um manancial de sistemas, que estão
> sempre com problemas começando pelo célebre SIRESP. Enquanto os decisores
> não se voltarem mais para sistemas "KISS" não se adianta muito, a não ser
> na área das negociatas.
>
>
>
> *Cumprimentos:  Carlos Mourato - Sines - Portugal*
>
> *Best regards from:  Carlos Mourato - Sines - Portugal*
>
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>
>
> 2014-11-04 13:43 GMT+00:00 João Costa > CT1FBF <ct1fbf  gmail.com>:
>
>> GPS back-up: World War Two technology employed
>>
>> Technology developed during World War Two is to be used as a back-up for
>> GPS.
>>
>> The General Lighthouse Authorities (GLA) have announced that they have
>> installed a system called eLoran in seven ports across Britain.
>>
>> The GLA say many critical instruments on ships use Global Navigation
>> Satellite Systems, and if they fail the consequences could be
>> disastrous.
>>
>> The new system, which is ground rather than satellite-based, is
>> designed to be used in the event of a GPS failure.
>>
>> "All vessels that sail today are massively dependent on GPS, " Martin
>> Bransby, research and radio navigation manager for the General
>> Lighthouse Authorities of the UK and Ireland, told the BBC's
>> technology programme Click.
>>
>> "It is their primary means of navigation - and a massive number of
>> instruments rely on it too.
>>
>> "If you don't have it, you are dead in the water."
>>
>> Testing for eLoran has taken place in Felixstowe, the busiest
>> container port in the UK.
>>
>> Each year, three million containers are brought in on some of the
>> biggest ships in the world.
>>
>> Safely manoeuvring these vessels in this packed waterway is vital, and
>> currently the only way to do this is with the help of GPS.
>>
>> Onboard the Galatea, a ship that is 80m (260ft) long, the GLA have
>> been finding out what happens if the satellite system goes wrong.
>>
>> Martin Bransby demonstrates a GPS failure by pulling the plug on the
>> ship's receiver.
>>
>> Within a few seconds, alarms start to sound on the bridge as one by
>> one the instruments stop working.
>>
>> "This is the gyrocompass - it steers the ship - you can see it
>> starting to fail," says Mr Bransby.
>>
>> "If we walk over here, this is the radar, and that's not working
>> either. This is the dynamic positioning: it holds the ship's position,
>> that's not working.
>>
>> "The electronic chart display becomes unusable. Even the ship's clock
>> stops working."
>>
>> In a series of tests, the GLA have found that almost every bit of kit
>> on the boat uses GPS - even the onboard satellite entertainment
>> system.
>>
>> Mr Bransby says: "You can imagine standing watch on this ship, it's
>> the middle of the night, it's dark, it's foggy, you are in the English
>> Channel, and then this happens.
>>
>> "What do you do? You're in a right mess, basically."
>>
>> Read the full BBC News story at:
>> http://www.bbc.co.uk/news/science-environment-29758872
>>
>> --
>> --
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>>
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>>
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-- 
Cumprimentos;

Luís Filipe Garcia S.
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