Dear Tom, A one year, single device licence to access the signal cost about AUD10K when I asked about a year ago. The plugin card for a commercial timing box was about AUD3K.
Cheers Michael On Mon, 10 Aug 2020 at 9:05 am, Tom Van Baak <t...@leapsecond.com> wrote: > Hi Stu, > > There's no problem with a semi-commercial posting here. You've been a > member for a decade and frequent contributor plus the subject matter is > exactly on-topic. So thanks for posting. > > I spent a while on your web site and didn't uncover a trove of white > papers. If you could post some URL's that would be appreciated. You > don't have to worry about being less accurate than GPS. I mean, there > are often far more important factors than nanosecond precision. You > didn't mention pricing; it's hard to imagine it's as free as GPS so that > seems like another disadvantage to me. > > Your comment about fewer satellites is spot on. That will be taken care > of if you give SpaceX / Starlink a call and join that bandwagon. There > are already 597 Starlink [1] satellites up there vs. 82 Iridium [2] > satellites, yes? > > If you have entry-level / hobbyist grade evaluation kits I'm sure a > number of us would be very interested to try it out. > > Thanks, > /tvb > > [1] https://en.wikipedia.org/wiki/Starlink > > [2] https://en.wikipedia.org/wiki/Iridium_satellite_constellation > > > On 8/9/2020 2:53 PM, Stewart Cobb wrote: > > Taka Kamiya and Forrest Christian both asked recently about the > alternative > > satellite PNT system using the Iridium satellites. That system was > > developed by my company, Satelles. It has been commercially available for > > more than a year now. > > > > The biggest advantage is that our signal is at least 30 dB stronger than > > GNSS signals (the exact numbers depend on whether you're talking to > > engineering or marketing :). You can easily get a usable signal in deep > > jungle, or a data center in the middle of a building's basement, or even > > inside a locked shipping container. The stronger signal is > correspondingly > > more difficult to jam or spoof than GNSS, and our signal has > anti-spoofing > > features as well. > > > > The biggest disadvantage is that it is not quite as accurate as GPS, > > because there are fewer satellites in view at any given time. > > > > I don't want to quote exact timing numbers here, because they depend a > lot > > on system integration details, but you can easily steer an OCXO within a > > few hundred nanoseconds of USNO time. With a rubidium, you can do > > considerably better. > > > > If you want to know more, our website is www.satellesinc.com. > > > > (If this message has been too commercial, I apologize in advance. The > > boundary between information and salesmanship is not always sharp.) > > > > Cheers! > > --Stu > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.