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

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 <toby.riddell@prevtec.com> 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.

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 <scmcgrath@gmail.com> 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 <toby.riddell@prevtec.com> 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. >

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 <toby.riddell@prevtec.com> 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 <scmcgrath@gmail.com> 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 <toby.riddell@prevtec.com> 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.

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&vxp=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 <medasaro@mit.edu> 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 <toby.riddell@prevtec.com> > 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 <scmcgrath@gmail.com> 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 <toby.riddell@prevtec.com> > 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. >

		Attila Kinali

On Sat, 3 Nov 2018 17:26:51 -0400 Toby Riddell <toby.riddell@prevtec.com> wrote: > 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). Unless you have a European style roof, with lots of metal around, there will be no benefit of placing the antenna below the roofline, as it will be electrically the highest grounded object. Hence you will need some lightning arrestors (go for satellite receiver equipment) anyways. This also means that you can go above the roofline, to avoid multipath, which is the single biggest contributor to timing jitter in GPSDOs with non-ideal antenna positions. Recommended are 2-3m above any surrounding obstacle, but I guess anything from 1m upwards is ok. > 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. And brand antenna is good enough unless you want to go for below 10ns accuracy. Brand names include Symmetricom/Microsemi, Trimble, Novatel, Leica, .... Attila Kinali -- <JaberWorky> The bad part of Zurich is where the degenerates throw DARK chocolate at you.

Hi Appears to be an Italian clone of the generic timing antenna. That is only a guess and it could easily be something very different …. Since it’s a part made for Erickson by somebody else, you would need their part number to properly track it down. If it’s a custom part, even that might be impossible. Bob > On Nov 4, 2018, at 12:57 PM, Toby Riddell <toby.riddell@prevtec.com> wrote: > > 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&vxp=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 <medasaro@mit.edu> 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 <toby.riddell@prevtec.com> >> 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 <scmcgrath@gmail.com> 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 <toby.riddell@prevtec.com> >> 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.