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Um geocacher recebeu esta resposta da Garmin:rifkind Escreveu:Com sorte, o pessoal que desenvolveu o firmware para os receptores de GPS, ainda estava traumatizado com o rollover de 1999 e arranjaram maneira de nunca mais ter essa dor de cabeça, ao estilo do Y2K.
Mas só por via das dúvidas, o Quest vai com um backup, para o caso de se passar. Afinal, é para essas ocasiões que temos 2!
Mais a sério, espero que ele sobreviva ao rollover. Estava à espera que ele (e o sósia) durassem mais uns anos.
MAntunes Escreveu:É contactar a Garmin...
What is the GPS Week Number Rollover (WNRO)?
The GPS system is world renowned for its ability to provide accurate and reliable positioning and timing information worldwide. The GPS satellites transmit to users the date and time accurate to nanoseconds. However, back in 1980, when the GPS system first began to keep track of time, the date and time was represented by a counter that could only count forward to a maximum of 1024 weeks, or about 19.7 years. After 1024 weeks had elapsed, this counter “rolled over” to zero, and GPS time started counting forward again. This first rollover occurred in August of 1999. The second rollover will occur on April 6, 2019.
Is My Device Affected?
For many years, Garmin has anticipated and prepared for this event. Regardless, Garmin has been performing exhaustive testing of current and legacy devices to determine if they will be affected by the GPS week number rollover. Our testing shows the vast majority of Garmin GPS devices will handle the WNRO without issues.
What is the Effect of a GPS Week Number Rollover Issue?
For GPS devices that are affected, after the rollover occurs, an incorrect date and time will be displayed. This incorrect time will also be used to timestamp track logs, compute sunrise and sunset, and other functions that rely upon the correct date and time. However, the positioning accuracy will not be affected. The device will continue to deliver the same positioning performance as before the rollover.
zoom_bee Escreveu::cry: nãaao!
Lá se vão os meus tijóis
MAntunes Escreveu:E a Magellan? Será que dão suporte a tijois?
zoom_bee Escreveu:Acho que estão um bocado "desnorteados" GPSs eles já têm, sugiro o quê?
[...] at least one KLM flight [...] and flights involving as many as 15 Boeing 777s and 787s in China were delayed or canceled over the weekend because of calendar-rollover errors on navigation systems aboard those aircraft. [...]
geo-amd Escreveu:https://arstechnica.com/information-technology/2019/04/gps-rollover-apparently-cause-of-multiple-flight-delays-groundings/[...] at least one KLM flight [...] and flights involving as many as 15 Boeing 777s and 787s in China were delayed or canceled over the weekend because of calendar-rollover errors on navigation systems aboard those aircraft. [...]
zoom_bee Escreveu:os meus dois tijóis estão porreiros, mas na verdade não encontro informação da data em lugar algum, talvez por isso...
On April 6, something known as the GPS rollover, a cousin to the dreaded Y2K bug, mostly came and went, as businesses and government agencies around the world heeded warnings and made software or hardware updates in advance. But in New York, something went wrong -- and city officials seem to not want anyone to know. [Editor's note: the link may be paywalled; alternative source] New submitter RAYinNYC shares a report:
At 7:59 p.m. E.D.T. on Saturday, the New York City Wireless Network, or NYCWiN, went dark, waylaying numerous city tasks and functions, including the collection and transmission of information from some Police Department license plate readers. The shutdown also interrupted the ability of the Department of Transportation to program traffic lights, and prevented agencies such as the sanitation and parks departments from staying connected with far-flung offices and work sites. The culprit was a long-anticipated calendar reset of the centralized Global Positioning System, which connects to devices and computer networks around the world. There has been no public disclosure that NYCWiN, a $500 million network built for the city by Northrop Grumman, was offline and remains so, even as workers are trying to restore it.
City officials tried to play down the shutdown when first asked about it on Monday, speaking of it as if it were a routine maintenance issue. "The city is in the process of upgrading some components of our private wireless network," Stephanie Raphael, a spokeswoman for the Department of Information Technology and Telecommunications, said in an email on Monday. She referred to the glitch as a "brief software installation period." By Tuesday, the agency acknowledged the network shutdown, but said in an emailed statement that "no critical public safety systems are affected." Ms. Raphael admitted that technicians have been unable to get the network back up and running, adding, "We're working overtime to update the network and bring all of it back online." The problem has raised questions about whether the city had taken appropriate measures to prepare the network for the GPS rollover.
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