[time-nuts] Thunderbolt GPS rollover

[WB6BNQ]

Gees Paul,

You must be answered a different message ?

To Robert,

If all you are doing is trying to get a time stamp and a pps measurement to 100 microsecond
precision, then there are cheaper ways to go then using a Thunderboldt.  There are a number
of consumer OEM level GPS boards that would provide what you need for under $100 each.
Thunderboldts usually go for more than $100 each.  there are ways of handling the counter
needs differently as well.

However, you may well be able to use a GPS right on board the rocket with logging.  It
seems to me a few Amateur rocket people have all ready done that very thing.  GOOGLE for
several sites on other rocket people.

Bill....WB6BNQ


paul swed wrote:

> Well there are far better experts then me.
> I can only say that an austron 2201 works very well and shouldn't. They
> were supposed to die in 1998 I believe. Essentially you put the date into
> it 1024 weeks ago and it does a very nice job of finding satellites,
> location, and establishing an accurate frequency.
> So I would guess the tbolts would do the same but I will bet the experts do
> know.
> If they do not I can sell you one real cheap. :-) Then stick with the old
> 2201.
> Regards
> Paul
> WB8TSL
>
> On Wed, Jun 6, 2012 at 10:33 PM, Robert Watzlavick <rocket at watzlavick.com>wrote:
>
> > Sorry to resurrect an old thread but I also have a question about using
> > the Thunderbolt in the future.  I'm considering using 4 of them in a
> > multilateration setup to track an amateur rocket with an onboard beacon.
> >  I'm a few years away from the flight so I don't want to invest in hardware
> > that may not work.  It doesn't matter if the date (or even the absolute
> > time) is wrong as I'll just be measuring the delta time between reception
> > of the beacon and each unit's 1 PPS output.  However, accurate position
> > data would be required.  I would also need the 10 MHz to be usable to drive
> > the counter measuring the delta time.
> >
> > Will the unit still "work" but just put out the wrong date?  Or will it
> > effectively turn into a brick?
> >
> > Thanks,
> > -Bob
> >
> > On 10/19/2011 08:06 PM, Thomas S. Knutsen wrote:
> >
> >> I do assume this is because of the 1024 week cycle? if so would it be
> >> possible to tell the GPS what  cycle it should be?
> >>
> >> Would the 10MHz out still be accurate?
> >>
> >> BR. Thomas.
> >>
> >> 2011/10/20 Mark Sims<holrum at hotmail.com>:
> >>
> >>> On July 30,  2017 all our Thunderbolts turn into back-dated pumpkins...
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