GPS week rollover issue

At 03:16 09 February 2019, kinsell wrote:
On 2/6/19 7:57 PM, Bruce Hoult wrote:
On Wednesday, February 6, 2019 at 9:00:44 AM UTC-8, Jonathan Foster
wrote:
I just came across this interesting page:
https://www.orolia.com/resources/blo...gps-2019-week-
rollover-what-you-need-know

On April 6th of this year the GPS week will roll over and on some
older
instruments it could mess up the date. How many of our soaring
instruments
might have this problem?

I'm guessing that will be the final end of my 1994 Cambridge Model 10.
(It's already had the battery replaced, of course)


I've got a 1996 era Garmin backpacker gps still holding the correct
date. Internal battery was replaced under warranty about 22 years ago.

I'd be surprised if it suddenly got the wrong date on April 6, but
really doesn't matter anyway. Lots of old Volksloggers got hit with the
date problem, maybe they'd be more subject to failure if any of them are
still in use.

Most of the Volksloggers were made with the Garmin GPS25 Engine, same as
legacy Cambridge.

At 03:16 09 February 2019, kinsell wrote:
On 2/6/19 7:57 PM, Bruce Hoult wrote:
On Wednesday, February 6, 2019 at 9:00:44 AM UTC-8, Jonathan Foster
wrote:
I just came across this interesting page:
https://www.orolia.com/resources/blo...gps-2019-week-
rollover-what-you-need-know

On April 6th of this year the GPS week will roll over and on some
older
instruments it could mess up the date. How many of our soaring
instruments
might have this problem?

I'm guessing that will be the final end of my 1994 Cambridge Model 10.
(It's already had the battery replaced, of course)


I've got a 1996 era Garmin backpacker gps still holding the correct
date. Internal battery was replaced under warranty about 22 years ago.

I'd be surprised if it suddenly got the wrong date on April 6, but
really doesn't matter anyway. Lots of old Volksloggers got hit with the
date problem, maybe they'd be more subject to failure if any of them are
still in use.

Most of the Volksloggers were made with the Garmin GPS25 Engine, same as
legacy Cambridge.

On Saturday, February 9, 2019 at 7:45:06 AM UTC-8, Tim Newport-Peace wrote:
At 03:16 09 February 2019, kinsell wrote:
On 2/6/19 7:57 PM, Bruce Hoult wrote:
On Wednesday, February 6, 2019 at 9:00:44 AM UTC-8, Jonathan Foster
wrote:
I just came across this interesting page:
https://www.orolia.com/resources/blo...gps-2019-week-
rollover-what-you-need-know

On April 6th of this year the GPS week will roll over and on some
older
instruments it could mess up the date. How many of our soaring
instruments
might have this problem?

I'm guessing that will be the final end of my 1994 Cambridge Model 10.
(It's already had the battery replaced, of course)


I've got a 1996 era Garmin backpacker gps still holding the correct
date. Internal battery was replaced under warranty about 22 years ago.

I'd be surprised if it suddenly got the wrong date on April 6, but
really doesn't matter anyway. Lots of old Volksloggers got hit with the
date problem, maybe they'd be more subject to failure if any of them are
still in use.

Most of the Volksloggers were made with the Garmin GPS25 Engine, same as
legacy Cambridge.

One rollover problem the Volkslogger doesn't have is due to the robust chassis.
It makes a good wheel chock.
Jim

On 2/9/19 9:31 AM, JS wrote:
On Saturday, February 9, 2019 at 7:45:06 AM UTC-8, Tim Newport-Peace wrote:
At 03:16 09 February 2019, kinsell wrote:
On 2/6/19 7:57 PM, Bruce Hoult wrote:
On Wednesday, February 6, 2019 at 9:00:44 AM UTC-8, Jonathan Foster
wrote:
I just came across this interesting page:
https://www.orolia.com/resources/blo...gps-2019-week-
rollover-what-you-need-know

On April 6th of this year the GPS week will roll over and on some
older
instruments it could mess up the date. How many of our soaring
instruments
might have this problem?

I'm guessing that will be the final end of my 1994 Cambridge Model 10.
(It's already had the battery replaced, of course)


I've got a 1996 era Garmin backpacker gps still holding the correct
date. Internal battery was replaced under warranty about 22 years ago.

I'd be surprised if it suddenly got the wrong date on April 6, but
really doesn't matter anyway. Lots of old Volksloggers got hit with the
date problem, maybe they'd be more subject to failure if any of them are
still in use.

Most of the Volksloggers were made with the Garmin GPS25 Engine, same as
legacy Cambridge.

One rollover problem the Volkslogger doesn't have is due to the robust chassis.
It makes a good wheel chock.
Jim


At least the Volksloggers put out actual IGC files. The Models 10, 20,
and 25 should have been relegated to wheel chock duty long before the
Volksloggers.

On 2/9/19 8:33 AM, Tim Newport-Peace wrote:
At 03:16 09 February 2019, kinsell wrote:
On 2/6/19 7:57 PM, Bruce Hoult wrote:
On Wednesday, February 6, 2019 at 9:00:44 AM UTC-8, Jonathan Foster
wrote:
I just came across this interesting page:
https://www.orolia.com/resources/blo...gps-2019-week-
rollover-what-you-need-know

On April 6th of this year the GPS week will roll over and on some
older
instruments it could mess up the date. How many of our soaring
instruments
might have this problem?

I'm guessing that will be the final end of my 1994 Cambridge Model 10.
(It's already had the battery replaced, of course)


I've got a 1996 era Garmin backpacker gps still holding the correct
date. Internal battery was replaced under warranty about 22 years ago.

I'd be surprised if it suddenly got the wrong date on April 6, but
really doesn't matter anyway. Lots of old Volksloggers got hit with the
date problem, maybe they'd be more subject to failure if any of them are
still in use.

Most of the Volksloggers were made with the Garmin GPS25 Engine, same as
legacy Cambridge.



But not all GPS25's were the same, depends on what firmware was loaded.
Here's a more comprehensive article, at the very end it talks about some
1999 related failures that got kicked down the road many years based on
firmware.

https://www.gps.gov/governance/advis...-11/powers.pdf

In the unlikely event you're able to update firmware in a GPS engine,
that should be done prior to April.

-Dave