[time-nuts] time-nuts Digest, Vol 95, Issue 33
paulswedb at gmail.com
Thu Jun 7 21:24:59 UTC 2012
I don't get it.
20 years is just about the time we time-nuts get the good rcvrs. Whats with
these manufacturers not serving the important people?
On Thu, Jun 7, 2012 at 5:11 PM, Mark Sims <holrum at hotmail.com> wrote:
> Is too true! The GPS signal sends the week number as a 10 bit integer
> number. That number rolls over every 1024 weeks (call it 20 years).
> There is no data sent that indicates which 1024 week cycle it is (some have
> been proposed, but I don't think anything was ever implemented). Receiver
> manufacturers usually bias the received week number based upon when the
> receiver was made. That lets them ship receivers that are good for 20
> years. After that, they may display a bad date.
> Not true. GPS week is imbedded in the GPS data.
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