{"id":6673,"date":"2019-03-27T15:19:45","date_gmt":"2019-03-27T18:19:45","guid":{"rendered":"http:\/\/agrodata.me\/?p=6673"},"modified":"2019-03-29T10:16:00","modified_gmt":"2019-03-29T13:16:00","slug":"voce-conhece-bug-do-milenio","status":"publish","type":"post","link":"https:\/\/agrodata.me\/en\/2019\/03\/27\/voce-conhece-bug-do-milenio\/","title":{"rendered":"Voc\u00ea conhece o Bug do Mil\u00eanio?"},"content":{"rendered":"
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Bug nos aparelhos GPS pode faz\u00ea-los parar de operar no dia 6 de abril de 2019<\/strong><\/h1>\n

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O Sistema de\u00a0Posicionamento Global (GPS) hoje faz parte da nossa vida ningu\u00e9m pode negar, por exemplo, utilizamos ele para nos levar at\u00e9 uma loja, evitar o tr\u00e2nsito pesado, nos levar at\u00e9 um parque ou at\u00e9 mesmo para uma cidade que n\u00e3o conhecemos. Mas ele n\u00e3o \u00e9 s\u00f3 utilizado em nossos smartphones, at\u00e9 mesmo hoje os avi\u00f5es que nos transportam utilizam o mesmo para orientar seus pilotos.<\/p>\n

Um sistema t\u00e3o complexo, necessita de uma metodologia pr\u00f3pria para funcionar.<\/p>\n

E assim, para evitar erros, seu rel\u00f3gio necessita ser bem preciso e como parte disso ele possui sua pr\u00f3pria maneira de expressar data e hora: atrav\u00e9s da contagem de semanas e segundos dentro de uma semana, a partir de uma data inicial. O tempo para o GPS \u00e9 constitu\u00eddo de um\u00a0n\u00famero bin\u00e1rio de 10 bits para contar o seu \u201cn\u00famero de semanas\u201d. Receptores GPS, incluindo todos os modelos Arrow, traduzem o n\u00famero da semana do GPS no formato de hora mais comum (data, m\u00eas e ano).<\/p>\n

Um n\u00famero bin\u00e1rio de 10 bits permite apenas contar de 0 a 1023, o que significa que, o GPS pode manter ao todo uma faixa de 1024 semanas a partir de uma data inicial (sendo que a \u201cSemana 0\u201d do sistema foi em 6 de janeiro de 1980 \u00e0s 00:00:00 UTC (Universal Time Coordinate).<\/p>\n

Isso tamb\u00e9m significa que a cada 19,7 anos (1024 semanas), a contagem \u00e9 zerada, ou seja, h\u00e1 uma redefini\u00e7\u00e3o (reset) de 1024 para 0, ocorrendo assim o chamado \u201cGPS Week Number Rollover\u201d. Aqui podemos traduzir Rollover, como redefini\u00e7\u00e3o do sistema. O \u00faltimo (e segundo) rollover, ocorreu em 21 de agosto de 1999.<\/p>\n

O que acontecer\u00e1 no 6 de abril de 2019?<\/strong><\/h3>\n

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Em 6 de abril\u00a0de 2019, teremos o terceiro rollover na hist\u00f3ria do sistema GPS. Alguns receptores GPS, nos quais esse rollover n\u00e3o foi contabilizado, podem se confundir com o in\u00edcio da nova contagem.<\/p>\n

Na reportagem do Jornal O GLOBO, a FalTech GPS, fabricante brit\u00e2nica de repetidores GPS, alerta que \u201cmercados financeiros, companhias geradoras de energia, servi\u00e7os de emerg\u00eancia e sistemas de controle industrial podem ser afetados<\/em>\u201d, ressaltando, por\u00e9m, que como se trata do segundo bug do tipo, muitos fornecedores j\u00e1 devem ou deveriam ter resolvido o problema.<\/p>\n

\u201cOs efeitos devem ser mais difundidos hoje, porque muito mais sistemas integraram o GPS em suas opera\u00e7\u00f5es<\/em>\u201c, afirmou Bill Malik, vice-presidente da Trend, em entrevista ao site Tom\u2019s Guide. \u201c(\u2026) Portos carregam e descarregam cont\u00eaineres automaticamente, usando GPS para guiar as gruas. Sistemas de seguran\u00e7a p\u00fablica incorporaram o GPS, assim como sistemas de monitoramento do tr\u00e1fego. H\u00e1 20 anos essas conex\u00f5es eram primitivas, agora elas est\u00e3o incorporadas. Ent\u00e3o, qualquer impacto agora ser\u00e1 substancialmente maior.<\/em>\u201d<\/p>\n

Apesar dessa condi\u00e7\u00e3o, voc\u00eas n\u00e3o precisam se preocupar, pois\u00a0os receptores Arrow n\u00e3o ser\u00e3o afetados pelo\u00a0\u201cBug do Mil\u00eanio\u201d<\/strong>. O rollover do GPS foi contabilizado e implementado em todas as constru\u00e7\u00f5es de firmware dos receptores Arrow disponibilizados pela EOS (fabricante) desde a cria\u00e7\u00e3o da linha de produtos.<\/p>\n

Fonte: Jornal O GLOBO<\/a><\/em><\/strong><\/p>\n\t<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n<\/div><\/div>","protected":false},"excerpt":{"rendered":"Bug nos aparelhos GPS pode faz\u00ea-los parar de operar no dia 6 de abril de 2019 O Sistema de\u00a0Posicionamento Global (GPS) hoje faz parte da...","protected":false},"author":1,"featured_media":6679,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69],"tags":[73,75,70,76,74,72],"class_list":{"0":"post-6673","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-arrow","8":"tag-agrodata","9":"tag-arrow","10":"tag-bug","11":"tag-eos","12":"tag-gnss","13":"tag-gps"},"yoast_head":"\nVoc\u00ea conhece o Bug do Mil\u00eanio? - AgroData<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/agrodata.me\/en\/2019\/03\/27\/voce-conhece-bug-do-milenio\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Voc\u00ea conhece o Bug do Mil\u00eanio? 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