4 ms·
perhaps misunderstanding, but you could get time signals from GPS (or GLONASS)
by jjtheblunt 3y ago
perhaps misunderstanding, but you could get time signals from GPS (or GLONASS)
- jazzyjackson 3y agosure, just a matter of what servers are configured to do ahead of time and what happens when assumptions fail - are the servers tested against a situation where they can't get the time as expected etc
- traceroute66 3y ago> you could get time signals from GPS (or GLONASS) You forgot to mention Galileo ... GLONASS may not be politically attractive :) But beyond the GNSS ecosystem, there are of course other interesting options: Safran STL[1] which uses LEO sats. Apparently it works well in places where you can't get a good GNSS signal (i.e. indoors without an external antenna). (This was previously Orolia STL, but they were acquired by Safran). Most national time labs also offer a leased-line service, e.g. NPL (UK)[2] There is also a very niche (read: VERY expensive) commercial timing-as-a-service product from a company called Hoptroff[3]. You license both the service/connection plus their software clients, so the $$$$$$ add up. Definitely one of those "if you have to ask you can't afford it" vendors. [1] https://safran-navigation-timing.com/product/stl-option https://safran-navigation-timing.com/product/stl-option [2] https://www.npl.co.uk/npltime https://www.npl.co.uk/npltime [3] https://www.hoptroff.com/ https://www.hoptroff.com/
- jjtheblunt 3y agoGalileo too! (Pre coffee oversight) And, recursively, from celltower signals for any CDMA-related technology, i think.
- c_o_n_v_e_x 3y agoWhat happens if/when your GNSS constellation operator intentionally degrades quality (ex: GPS & selective availability)? Do you fall back to a local atomic clock assuming one is available?