Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread David Taylor
On 14/08/2013 21:20, Rob wrote: [] The raspberry pi already does that. It regularly (and on shutdown) saves the date/time in a file and loads that on boot. No need to handle this in ntpd. it is done in the /etc/init.d scripts. Thanks, Rib, I didn't know that. Do you happen to know which

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread David Taylor
On 14/08/2013 22:07, Harlan Stenn wrote: David Malone writes: Indeed - you need to have a timestamp within about ten years of correct before you start up, otherwise the problem will be worse. Ntp has the same problem in figuring out the ntp epoch, though we've yet to see an ntp timestamp wrap

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread David Taylor
On 14/08/2013 17:44, Rob wrote: [] How does a good receiver know the correct time? Does it rely on local (backed-up) storage, or is there some way of receiving it via the almanac? Or are good receivers hardwired as well, only with a different valid span? I would not be surprised when good

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread Rob
David Taylor david-tay...@blueyonder.co.uk.invalid wrote: On 14/08/2013 17:44, Rob wrote: [] How does a good receiver know the correct time? Does it rely on local (backed-up) storage, or is there some way of receiving it via the almanac? Or are good receivers hardwired as well, only with a

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread Rob
David Taylor david-tay...@blueyonder.co.uk.invalid wrote: On 14/08/2013 21:20, Rob wrote: [] The raspberry pi already does that. It regularly (and on shutdown) saves the date/time in a file and loads that on boot. No need to handle this in ntpd. it is done in the /etc/init.d scripts.

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread David Taylor
On 15/08/2013 08:27, Rob wrote: The file is /etc/fake-hwclock.data It is set by the command fake-hwclock save which is in /etc/cron.hourly/fake-hwclock and in /etc/init.d/fake-hwclock which is called in the startup and shutdown sequence. Thanks, Rob, and my apologies for a finger slip

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread David Taylor
On 15/08/2013 08:34, Rob wrote: David Taylor david-tay...@blueyonder.co.uk.invalid wrote: On 14/08/2013 17:44, Rob wrote: [] How does a good receiver know the correct time? Does it rely on local (backed-up) storage, or is there some way of receiving it via the almanac? Or are good receivers

Re: [ntp:questions] Acutime Gold

2013-08-15 Thread Mark C. Stephens
I am trying to get this right, remote refid st t when poll reach delay offset jitter == oPPS(0) .PPS.0 l4 16 3770.000 -0.003 0.005 *GPS_PALISADE(0) .GPS.

Re: [ntp:questions] Order of servers in ntp.conf

2013-08-15 Thread Steve Kostecke
On 2013-08-15, unruh un...@invalid.ca wrote: On 2013-08-14, Steve Kostecke koste...@ntp.org wrote: The time server specified in each of those lines is the one which is currently selected as the sys_peer. But as I understand it, it is simply one of the systems which is not a false ticker,

Re: [ntp:questions] Order of servers in ntp.conf

2013-08-15 Thread unruh
On 2013-08-15, Steve Kostecke koste...@ntp.org wrote: On 2013-08-15, unruh un...@invalid.ca wrote: On 2013-08-14, Steve Kostecke koste...@ntp.org wrote: The time server specified in each of those lines is the one which is currently selected as the sys_peer. But as I understand it, it is

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread Magnus Danielson
On 08/15/2013 07:55 AM, David Taylor wrote: On 14/08/2013 22:07, Harlan Stenn wrote: David Malone writes: Indeed - you need to have a timestamp within about ten years of correct before you start up, otherwise the problem will be worse. Ntp has the same problem in figuring out the ntp epoch,

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread Magnus Danielson
On 08/15/2013 10:22 AM, David Taylor wrote: On 15/08/2013 08:34, Rob wrote: David Taylor david-tay...@blueyonder.co.uk.invalid wrote: On 14/08/2013 17:44, Rob wrote: [] How does a good receiver know the correct time? Does it rely on local (backed-up) storage, or is there some way of

Re: [ntp:questions] Acutime Gold

2013-08-15 Thread E-Mail Sent to this address will be added to the BlackLists
Mark C. Stephens wrote: remote refid st t when poll reach delay offset jitter oPPS(0) .PPS. 0 l4 16 377 0.000 -0.003 0.005 *GPS_PALISADE(0) .GPS. 0 l4 16 377 0.0000.014

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread unruh
On 2013-08-15, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 08/15/2013 10:22 AM, David Taylor wrote: On 15/08/2013 08:34, Rob wrote: David Taylor david-tay...@blueyonder.co.uk.invalid wrote: On 14/08/2013 17:44, Rob wrote: [] How does a good receiver know the correct time? Does it

Re: [ntp:questions] Order of servers in ntp.conf

2013-08-15 Thread David Woolley
On 14/08/13 16:03, Nils Brubaker wrote: all of whose error intervals overlap and uses the average of those times as the time to send on the the ntp engine. The others are false tickers. It estimates the error by looking at the round trip time and the other machine's estimate of its own max

Re: [ntp:questions] Order of servers in ntp.conf

2013-08-15 Thread Steve Kostecke
On 2013-08-15, unruh un...@invalid.ca wrote: On 2013-08-15, Steve Kostecke koste...@ntp.org wrote: [---=| Quote block shrinked by t-prot: 42 lines snipped |=---] The mitigation algorithm proceeds in three steps in turn. 1. If there are no survivors, the modem driver becomes the only

Re: [ntp:questions] Acutime Gold

2013-08-15 Thread Mark C. Stephens
If I have palisade prefer PPS comes up fine within a minute or so. When I tried making pps prefer it got an x beside the PPS. I waited for an hour or 2 but it was still marked bad. Not sure what's going on there.. this is the relevant part of the config: # PPS server 127.127.22.0 minpoll 4

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread David Taylor
On 15/08/2013 20:18, Magnus Danielson wrote: [] I do not mention a 500 week period. I mention a 1024 week period with various phases, 500, 512 and obviously 729 (wrapped this Sunday as we went into week 1753). OK, swap period with phase. Judging by some reports here, people may be using NTP

Re: [ntp:questions] Acutime Gold

2013-08-15 Thread E-Mail Sent to this address will be added to the BlackLists
Mark C. Stephens wrote: If I have palisade prefer PPS comes up fine within a minute or so. When I tried making pps prefer it got an x beside the PPS. I waited for an hour or 2 but it was still marked bad. Not sure what's going on there.. this is the relevant part of the config: # PPS

Re: [ntp:questions] Start of new GPS 1024 week epoch

2013-08-15 Thread David Taylor
On 15/08/2013 21:33, Magnus Danielson wrote: [] They completely avoid it by not numbering it that way. They have their own numbering scheme that fit's the system, and the conversion over to UTC is an added feature. It's all in ICD-GPS-200 for the current set of details, and in the ION red book