NotíciasTecnologia
Sistemas de GPS podem parar de funcionar no dia 6 de abril
Erro na contagem do tempo está sendo comparado ao 'bug do milênio'
Um erro na forma como satélites e sensores GPS calculam o tempo poderá causar falhas em sistemas de localização no dia 6 de abril. O problema, que está sendo comparado ao “bug do milênio”, que assustou a indústria da tecnologia na virada para o ano 2000, não afetará os smartphones, pois esses equipamentos são recentes. [
Sistemas mais antigos de navegação de navios, carros e aviões podem estar suscetíveis a erros, além de redes de computadores, servidores, instalações elétricas, sites e outros equipamentos que dependam de satélites GPS para ajustarem seus relógios.
o erro ocorre porque os dispositivos mais antigos começaram a contar o tempo em 6 de janeiro de 1980 e realizam esta tarefa verificando as semanas. Nos equipamentos mais antigos, o software destinava 10 bits para essa função. Dois elevado à décima potência é 1024, ou seja, esses equipamentos eram capazes de contar 1024 semanas, ou 19,7 anos.
Isso que dizer que o mesmo problema já aconteceu no dia 21 de agosto de 1999. Contudo, naquela época, dependíamos menos do GPS. Agora, 1024 dias depois, o bug volta a ocorrer.
A FalTech GPS, fabricante britânica de repetidores GPS, alertou em um blog que “mercados financeiros, companhias geradoras de energia, serviços de emergência e sistemas de controle industrial podem ser afetados”. No entanto, como trata-se da segunda ocorrência do erro, muitos fornecedores já devem ter resolvido esse problema.
Segundo o vice-presidente da Trend, Bill Malik, em entrevista ao site Tom’s Guide, “os efeitos devem ser mais difundidos hoje, porque muito mais sistemas integraram o GPS em suas operações”. “Portos carregam e descarregam contêineres automaticamente, usando GPS para guiar as gruas. Sistemas de segurança pública incorporaram o GPS, assim como sistemas de monitoramento do tráfego. Há 20 anos essas conexões eram primitivas, agora elas estão incorporadas. Então, qualquer impacto agora será substancialmente maior”, explicou.
Em abril do ano passado, o Departamento de Segurança Nacional dos EUA orientou “organizações federais, estaduais, locais e do setor privado” a verificarem a necessidade de atualização do firmware com fabricantes dos seus equipamentos GPS. A Agência Europeia para a Segurança da Aviação emitiu um alerta semelhante.
O erro pode indicar que os aviões estão a quilômetros de distância da posição verdadeira, alguns equipamentos também podem ter ausência do horário, perda frequente do sinal de GPS ou impossibilidade da navegação.
“Eu não vou voar no dia 6 de abril”, afirmou Malik.
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