3 ms·

Yes they do. See thread above: https://news.ycombinator.com/item?id=29104177 https://news.ycombinator.com/item?id=29104177

• foota 5y ago
  Right, but you won't get a _good_ global error bound without doing the same amount of work. Do you have atomic clocks lying around?
  • NavinF 5y ago
    Yes I do, an Rb standard. You can buy them on eBay. It’s completely optional and only has any effect when GPS reception is down.