> The current GPS data format will fail in approximately 2057, 2079, or
> 2095 for decelerations of 42, 31, or 25.6 s/cy2, respectively.
> In terms of deployed systems, that's Real Soon Now.
Not to worry. It won't fail. The "solution" is simply
to let delta t sub LS in page 18 subframe 4 roll over
On Thu 2004-01-01T15:48:01 -0800, Tom Van Baak hath writ:
> Some historical notes on the GPS Week Number Rollover
> http://www.leapsecond.com/notes/gpswnro.htm
>
> I think the LEAPSECS group will find the part about the
> GPS leap second patent quite interesting!
So here is an obvious exercise for
On Thu 2004-01-01T15:48:01 -0800, Tom Van Baak hath writ:
> Some historical notes on the GPS Week Number Rollover
> http://www.leapsecond.com/notes/gpswnro.htm
>
> I think the LEAPSECS group will find the part about the
> GPS leap second patent quite interesting!
Wow. I can barely imagine being e
> The W1K rollover for GPS was in 1999, and all that year was spent
> testing various systems to see how they would fail. It would not be
> at all surprising if the impending doom of the leap second counter was
> noticed during a review of other deficiencies in the GPS system.
Please see:
Some h
In message <[EMAIL PROTECTED]>, Steve Allen writes:
>On Wed 2003-12-24T13:33:37 -0800, Steve Allen hath writ:
>> The current downlink data format for the GPS satellites stores the
>> difference between GPS system time and UTC using 8-bits.
>
>oops. I've just re-read the GPS Interface Control Docum
On Wed 2003-12-24T13:33:37 -0800, Steve Allen hath writ:
> The current downlink data format for the GPS satellites stores the
> difference between GPS system time and UTC using 8-bits.
oops. I've just re-read the GPS Interface Control Document.
Those 8-bits are a signed quantity. It can count to
The current downlink data format for the GPS satellites stores the
difference between GPS system time and UTC using 8-bits. This means
that the maximum difference ( GPS - UTC ) that can be stored is 255
seconds. If leap seconds continue to be inserted into UTC, then the
current fleet of GPS satel
