Re: [time-nuts] Expected behaviour from net4501, oncore and ntpns?
Thank you. I also had a reply off-list with some documentation so I will attempt the fix described therein. On Sun, Jan 13, 2019, 04:31 Anders Wallin, wrote: > from 1995-05-28 to 2019-01-11 is exactly 1024 weeks, do your receiver has a > GPS-week rollover problem... > > On Sat, Jan 12, 2019 at 12:16 AM Toby Riddell > wrote: > > > Hi all, > > > > I got my Soekris net4501 hooked up to an oncore module and antenna and > > ntpns has been talking nicely to the oncore. After a couple of hours it > > started to serve NTP to a client however the time shown for the net4501 > on > > the NTP client is approx. 600s slow (see last line): > > > > $ ntpq -p > > remote refid st t when poll reach delay offset > > jitter > > > > > == > > *reverb.baxterit 213.251.128.249 2 u 78 256 377 17.8590.575 > > 2.196 > > +k8s-w01.tblflp. 152.2.133.53 2 u 12 256 377 17.9922.945 > > 1.153 > > +ip225.ip-54-39- 213.251.128.249 2 u 260 256 377 18.229 -0.193 > > 1.611 > > x192.168.1.44.GPS.1 u 18 256 3770.830 -619315 > > 0.484 > > > > Also the time of day displayed in 'show oncore 0' is correct, but the > year > > is wrong (I've obfuscated the position data in the output, but it's > > essentially correct): > > > > show oncore 0 > > serial port = /dev/cuau1 > > state = 12 visible/track/lock = 13/2/0 dop = 0.0 [m] > > 1999-05-28 22:02:02.16953 > > Leap second info: 2017-01-01 00:00:00 NONE > > 555299878 seconds (6427 days) from now > > lat = xxx (xx.x), lon = xxx (xx.xxx), ht > > (xx.xx) > > http://maps.google.com/maps?ll=xx.xxx,xx.xxx=0.03,0.08=k > > rcv_status = 0x8 = AcqSat/PosHold > > utc_offset = 18 > > site_survey = 2 (~3073 sec left) > > Sat Dopler Elev Azi Health Mode SigStr IODE Status Offset > > 8 3828 12 180 00 841 0a2 0.134221487 > > 23969 62 279 00 3 0 020 0.385877161 > > 26 -2039 55 52 00 3 0 020 0.436211366 > > 27 3287 32 157 00 846 0a2 0.452988591 > > > > Output from 'show source' and 'show oncore 0 version' is: > > > > show source > > Source oncore_0: votes 3.00 flags los 0/15 update 1 SELECTED > > limit 1.28e-01 No leapsecond at end of today > > stratum 0 refid [GPS] > > delay 0.0 dispersion 0.00512 > > last_ts 927928914.00102last_delta 0.00103 > > > > show oncore 0 version > > @@Cj > > COPYRIGHT 1991-1997 MOTOROLA INC. > > SFTW P/N # 98-P36848P > > SOFTWARE VER # 3 > > SOFTWARE REV # 1 > > SOFTWARE DATE May 28 1999 > > MODEL #R5122U1154 > > HWDR P/N # 5 > > SERIAL # R0ANKH > > MANUFACTUR DATE 0M19 > > > > I see that the site_survey is still happening - will things correct > > themselves if I leave it long enough? > > > > Toby > > ___ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Expected behaviour from net4501, oncore and ntpns?
Hi all, I got my Soekris net4501 hooked up to an oncore module and antenna and ntpns has been talking nicely to the oncore. After a couple of hours it started to serve NTP to a client however the time shown for the net4501 on the NTP client is approx. 600s slow (see last line): $ ntpq -p remote refid st t when poll reach delay offset jitter == *reverb.baxterit 213.251.128.249 2 u 78 256 377 17.8590.575 2.196 +k8s-w01.tblflp. 152.2.133.53 2 u 12 256 377 17.9922.945 1.153 +ip225.ip-54-39- 213.251.128.249 2 u 260 256 377 18.229 -0.193 1.611 x192.168.1.44.GPS.1 u 18 256 3770.830 -619315 0.484 Also the time of day displayed in 'show oncore 0' is correct, but the year is wrong (I've obfuscated the position data in the output, but it's essentially correct): show oncore 0 serial port = /dev/cuau1 state = 12 visible/track/lock = 13/2/0 dop = 0.0 [m] 1999-05-28 22:02:02.16953 Leap second info: 2017-01-01 00:00:00 NONE 555299878 seconds (6427 days) from now lat = xxx (xx.x), lon = xxx (xx.xxx), ht (xx.xx) http://maps.google.com/maps?ll=xx.xxx,xx.xxx=0.03,0.08=k rcv_status = 0x8 = AcqSat/PosHold utc_offset = 18 site_survey = 2 (~3073 sec left) Sat Dopler Elev Azi Health Mode SigStr IODE Status Offset 8 3828 12 180 00 841 0a2 0.134221487 23969 62 279 00 3 0 020 0.385877161 26 -2039 55 52 00 3 0 020 0.436211366 27 3287 32 157 00 846 0a2 0.452988591 Output from 'show source' and 'show oncore 0 version' is: show source Source oncore_0: votes 3.00 flags los 0/15 update 1 SELECTED limit 1.28e-01 No leapsecond at end of today stratum 0 refid [GPS] delay 0.0 dispersion 0.00512 last_ts 927928914.00102last_delta 0.00103 show oncore 0 version @@Cj COPYRIGHT 1991-1997 MOTOROLA INC. SFTW P/N # 98-P36848P SOFTWARE VER # 3 SOFTWARE REV # 1 SOFTWARE DATE May 28 1999 MODEL #R5122U1154 HWDR P/N # 5 SERIAL # R0ANKH MANUFACTUR DATE 0M19 I see that the site_survey is still happening - will things correct themselves if I leave it long enough? Toby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Need recommendation for GPS antenna for Oncore GPS module
I spotted this on Ebay, the price is very attractive and I saw this model mentioned previously in the mailing list archives: https://www.ebay.ca/itm/Ericsson-KRE-1012082-1-GPS-Antenna-26dBi-For-HUBER-SUHNER-Bracket-84097323/272646019498?hash=item3f7af819aa:g:US8AAOSwRUhZAIhz:rk:3:pf:0=mtr Anyone have a manual or datasheet for it? I cannot seem to find one using Google. On Sun, 4 Nov 2018 at 12:41, Matthew D'Asaro wrote: > For what it is worth, I got a used HP/Symmetricom 58532a antenna off of > eBay for about $50. It needed a minor repair (broken internal coax) but > once that was done it has worked great for me. The other one I considered > was the 58504a but they were more expensive on the used market and didn't > seem as weather proof (a special weather proof cap was offered as an add-on > but most don't have it) so I went with the newer 58532a. > > -Matthew D'Asaro > > > On Nov 4, 2018, at 8:43 AM, Toby Riddell > wrote: > > > > Thanks Scott - I will look into getting one of those. And noted re. the > > roofline! > > > >> On Sun, 4 Nov 2018 at 07:26, Scott McGrath wrote: > >> > >> For timing use ideally it should be above the roofline by at least > several > >> feet otherwise satellites close to the horizon will be not be visible. > >> > >> The generally preferred antenna is the Agilent/Keysight/Symmetricom. > >> 58504A antenna also any outdoor antenna made by Trimble or TrueTime as > long > >> as antenna does not use a downconverter. > >> > >> > >> > >> On Nov 3, 2018, at 5:26 PM, Toby Riddell > wrote: > >> > >> Hi all, > >> > >> I want to fit a GPS antenna on our house (the attic is being renovated > and > >> it just occurred to me that if I move fast I can get it done before the > >> walls are closed up again!) > >> > >> I was planning on having it mounted on a south-facing wall but below the > >> roofline - does this sound okay for picking up satellites? It can poke > >> above the roofline if needed as long as the mounts are on the wall (not > the > >> top of the roof). > >> > >> Is there a recommended antenna? I am planning on feeding it into an > Oncore > >> GPS module which will then interface to a Soekris net4501 running > nanoBSD > >> and ntpns. > >> > >> Thanks! > >> > >> Toby > >> ___ > >> time-nuts mailing list -- time-nuts@lists.febo.com > >> To unsubscribe, go to > >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > >> and follow the instructions there. > >> > >> ___ > >> time-nuts mailing list -- time-nuts@lists.febo.com > >> To unsubscribe, go to > >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > >> and follow the instructions there. > >> > > ___ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Need recommendation for GPS antenna for Oncore GPS module
Thanks Scott - I will look into getting one of those. And noted re. the roofline! On Sun, 4 Nov 2018 at 07:26, Scott McGrath wrote: > For timing use ideally it should be above the roofline by at least several > feet otherwise satellites close to the horizon will be not be visible. > > The generally preferred antenna is the Agilent/Keysight/Symmetricom. > 58504A antenna also any outdoor antenna made by Trimble or TrueTime as long > as antenna does not use a downconverter. > > > > On Nov 3, 2018, at 5:26 PM, Toby Riddell wrote: > > Hi all, > > I want to fit a GPS antenna on our house (the attic is being renovated and > it just occurred to me that if I move fast I can get it done before the > walls are closed up again!) > > I was planning on having it mounted on a south-facing wall but below the > roofline - does this sound okay for picking up satellites? It can poke > above the roofline if needed as long as the mounts are on the wall (not the > top of the roof). > > Is there a recommended antenna? I am planning on feeding it into an Oncore > GPS module which will then interface to a Soekris net4501 running nanoBSD > and ntpns. > > Thanks! > > Toby > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Need recommendation for GPS antenna for Oncore GPS module
Hi all, I want to fit a GPS antenna on our house (the attic is being renovated and it just occurred to me that if I move fast I can get it done before the walls are closed up again!) I was planning on having it mounted on a south-facing wall but below the roofline - does this sound okay for picking up satellites? It can poke above the roofline if needed as long as the mounts are on the wall (not the top of the roof). Is there a recommended antenna? I am planning on feeding it into an Oncore GPS module which will then interface to a Soekris net4501 running nanoBSD and ntpns. Thanks! Toby ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
