Re: [time-nuts] Lecia L1 GPS chokering antenna voltage,
I contacted Leica Australia sales requesting help regarding the unknown Leica GPS L1 Choke Ring antenna Monday morning. The sales person duly referred me to support and I had a call back within 30 minutes. The support staff spent the entire morning assisting me to identify this antenna. The support started with phone calls and was followed by an amount of email. As you all know, getting information out of the big 3 in precision time and frequency has become a waste of time and frustrating. I am happy to report, the staff at Leica Australia were enthusiastic, courteous, dedicated, knowledgeable and just plain helpful. At one stage I had 5 different staff emailing me with updates. We all seemed to have a common interest in precision timing and measurement. I now have the data I need plus a whole lot more information I was not aware of before. For instance, a warning was given that some of the antenna heads are sealed with nitrogen so be careful when opening them. Please be mindful if opening a GPS antenna in future? The Leica staff even attempted to find calibration data for my serial number. This was all for a guy that walked in, off the street, The support service is fantastic and I now have great trust in Leica. In future, when I am asked for a recommendation for precision geosystems or timing, I will have no qualms in recommending Leica, based on this great experience. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of bg Sent: Tuesday, 16 July 2013 7:38 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Good! N is supposed to go to north, yes! But for this antenna it does not matter... longer story below. This is used when you do phase differential stuff. Which usually means L1/L2 stuff and specifically antenna calibration data for az/el. I cannot find any calibration data. http://www.ngs.noaa.gov/ANTCAL/Antennas.jsp?manu=AeroAntenna http://www.geopp.de/index.php?bereich=5kategorie=34artikel=62 However if you look at the AT antennas at NOAA with a spike radome - I think the base chokering is the same as ours. Just a different antenna element in say the AT2775-43. For that antenna it matters! I think the application for the AT575-90 was code differential dgps (marine DGPS) base stations. This service gives the users 1m:ish accuracy. Phase calibration is clearly 10cm and not needed for basic code DGPS. -- Björn Originalmeddelande Från: Mark C. Stephens ma...@non-stop.com.au Datum: 2013-07-15 12:13 (GMT+01:00) Till: Discussion of precise time and frequency measurement time-nuts@febo.com Rubrik: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Thank you, It is a AT575-90_G! Now, On the bottom, there is an arrow labelled N. I presume that is supposed to face north? I can't tell you how ideal this antenna is for my application, outstanding! Thank you again. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of b...@lysator.liu.se Sent: Monday, 15 July 2013 7:02 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Hi, Is the antenna identical to this? http://www.aeroantenna.com/PDF/AT575-90_G.pdf http://ebookbrowse.com/at575-90-g-pdf-d359926216 (alternate link) Do you have some pictures of the antenna? In particular the antenna element? Aeroantennas of this vintage is usually RG which according to the spec above 5-18VDC. I recall having seen 4.5V as lower level to. Modern antennas are usually good to 3.3 or lower. With vintage antennas this is much more uncertain. -- Björn I have been trying to find a datasheet for my Leica Antenna. All that is marked on the antenna is part number 10147. I want to find out what voltage range the preamp works off. Anybody have any idea? -marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
[time-nuts] eLoran announcement in the UK
Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestrautm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20membersutm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersutm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.cfmutm_contact=17085095 /A navigation system resilient to GPS jamming will be installed along the south and east coast of the UK, it was announced today./ /Following approval by the Department for Transport, seven differential eLoran stations will be installed to provide alternative position, navigation and timing (PNT) information to ensure that ships equipped with eLoran receivers can navigate safely in the event of GPS failure in one of the busiest shipping regions in the world./ /The GPS signals most ships rely on are vulnerable to both deliberate and accidental jamming, which is causing increasing concern because of the wide availability of GPS jammers online for as little as £30 that are capable of causing complete outages across all receivers currently on the market./ /The rollout, led by the General Lighthouse Authorities (GLAs) of the UK and Ireland, is the first in the world to deploy this technology for shipping companies operating both passenger and cargo services./ . etc Regards David (I've designed built off air standards for 60kHz MSF, 198kHz BBC radio4 and GPS so it looks another project just added to the DO list) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
Do you have any idea of the transmitter power/antenna gain? The relatively low power of the UK 60 kHz is strong enough to interfere w/ WWVB in MA, so I'm wondering if the UK eLORAN might be usably strong. -John === Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestrautm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20membersutm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersutm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.cfmutm_contact=17085095 /A navigation system resilient to GPS jamming will be installed along the south and east coast of the UK, it was announced today./ /Following approval by the Department for Transport, seven differential eLoran stations will be installed to provide alternative position, navigation and timing (PNT) information to ensure that ships equipped with eLoran receivers can navigate safely in the event of GPS failure in one of the busiest shipping regions in the world./ /The GPS signals most ships rely on are vulnerable to both deliberate and accidental jamming, which is causing increasing concern because of the wide availability of GPS jammers online for as little as £30 that are capable of causing complete outages across all receivers currently on the market./ /The rollout, led by the General Lighthouse Authorities (GLAs) of the UK and Ireland, is the first in the world to deploy this technology for shipping companies operating both passenger and cargo services./ . etc Regards David (I've designed built off air standards for 60kHz MSF, 198kHz BBC radio4 and GPS so it looks another project just added to the DO list) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
Hi There are multiple European chains running that can be picked up from the US. They all are in the skywave zone distance wise. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of J. Forster Sent: Wednesday, July 17, 2013 12:31 PM To: Discussion of precise time and frequency measurement@febo.com; time-nuts@febo.com@qkmail9.01trend.com Subject: Re: [time-nuts] eLoran announcement in the UK Do you have any idea of the transmitter power/antenna gain? The relatively low power of the UK 60 kHz is strong enough to interfere w/ WWVB in MA, so I'm wondering if the UK eLORAN might be usably strong. -John === Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestra; utm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20members utm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersu tm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.c fmutm_contact=17085095 /A navigation system resilient to GPS jamming will be installed along the south and east coast of the UK, it was announced today./ /Following approval by the Department for Transport, seven differential eLoran stations will be installed to provide alternative position, navigation and timing (PNT) information to ensure that ships equipped with eLoran receivers can navigate safely in the event of GPS failure in one of the busiest shipping regions in the world./ /The GPS signals most ships rely on are vulnerable to both deliberate and accidental jamming, which is causing increasing concern because of the wide availability of GPS jammers online for as little as £30 that are capable of causing complete outages across all receivers currently on the market./ /The rollout, led by the General Lighthouse Authorities (GLAs) of the UK and Ireland, is the first in the world to deploy this technology for shipping companies operating both passenger and cargo services./ . etc Regards David (I've designed built off air standards for 60kHz MSF, 198kHz BBC radio4 and GPS so it looks another project just added to the DO list) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
On 17/07/13 17:27, David wrote: Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestrautm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20membersutm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersutm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.cfmutm_contact=17085095 Now this will be interesting. My -understanding- is that eLORAN is backwards compatible with LORAN-C, (So an old LORAN receiver will still receive the eLORAN signals, you just wont get the extra features [low rate data transmissions, timing built in, rather than relying on TOC etc]) Now if only they'd stop playing with Anthorn during the day at the moment, I could do some more tests. Ah well, I'll get to it later, it'll be cooler then anyway! Iain ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
On 17/07/13 17:55, Bob Camp wrote: There are multiple European chains running that can be picked up from the US. They all are in the skywave zone distance wise. Checkout http://www.loran-europe.eu for details. Iain ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
I find this interesting. The military is also rekindling an interest in HF communications. It seems that they are worried that satellite communications are vulnerable. A story I heard was that one fellow (a ham and book reseller) spent 10 year buying up surplus Collins 5 kW transmitters from the government. He had the warehouse space and equipment to handle heavy stuff. Now there is a run on his stock by, guess who, the military. Brian On 7/17/2013 17:06, Iain Young wrote: On 17/07/13 17:27, David wrote: Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestrautm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20membersutm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersutm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.cfmutm_contact=17085095 Now this will be interesting. My -understanding- is that eLORAN is backwards compatible with LORAN-C, (So an old LORAN receiver will still receive the eLORAN signals, you just wont get the extra features [low rate data transmissions, timing built in, rather than relying on TOC etc]) Now if only they'd stop playing with Anthorn during the day at the moment, I could do some more tests. Ah well, I'll get to it later, it'll be cooler then anyway! Iain ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2242 / Virus Database: 3204/5998 - Release Date: 07/17/13 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2242 / Virus Database: 3204/5998 - Release Date: 07/17/13 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
On a smaller scale, my two Austron 2100Fs are sitting, patiently waiting Has anyone had success in the US locking a standard LORAN-C receiver/antenna onto the European stations lately? -John = I find this interesting. The military is also rekindling an interest in HF communications. It seems that they are worried that satellite communications are vulnerable. A story I heard was that one fellow (a ham and book reseller) spent 10 year buying up surplus Collins 5 kW transmitters from the government. He had the warehouse space and equipment to handle heavy stuff. Now there is a run on his stock by, guess who, the military. Brian On 7/17/2013 17:06, Iain Young wrote: On 17/07/13 17:27, David wrote: Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestrautm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20membersutm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersutm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.cfmutm_contact=17085095 Now this will be interesting. My -understanding- is that eLORAN is backwards compatible with LORAN-C, (So an old LORAN receiver will still receive the eLORAN signals, you just wont get the extra features [low rate data transmissions, timing built in, rather than relying on TOC etc]) Now if only they'd stop playing with Anthorn during the day at the moment, I could do some more tests. Ah well, I'll get to it later, it'll be cooler then anyway! Iain ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2242 / Virus Database: 3204/5998 - Release Date: 07/17/13 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2242 / Virus Database: 3204/5998 - Release Date: 07/17/13 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
Been quite. I have had a 3586 on listening to wwvb for testing and I jump up to 100KC every now and then. Granted if I don't here anything I go back. Pretty pot luck. Maybe they lost funding or since wwvb is now so good we won't do anything. Regards Paul. On Wed, Jul 17, 2013 at 1:31 PM, J. Forster j...@quikus.com wrote: On a smaller scale, my two Austron 2100Fs are sitting, patiently waiting Has anyone had success in the US locking a standard LORAN-C receiver/antenna onto the European stations lately? -John = I find this interesting. The military is also rekindling an interest in HF communications. It seems that they are worried that satellite communications are vulnerable. A story I heard was that one fellow (a ham and book reseller) spent 10 year buying up surplus Collins 5 kW transmitters from the government. He had the warehouse space and equipment to handle heavy stuff. Now there is a run on his stock by, guess who, the military. Brian On 7/17/2013 17:06, Iain Young wrote: On 17/07/13 17:27, David wrote: Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestrautm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20membersutm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersutm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.cfmutm_contact=17085095 Now this will be interesting. My -understanding- is that eLORAN is backwards compatible with LORAN-C, (So an old LORAN receiver will still receive the eLORAN signals, you just wont get the extra features [low rate data transmissions, timing built in, rather than relying on TOC etc]) Now if only they'd stop playing with Anthorn during the day at the moment, I could do some more tests. Ah well, I'll get to it later, it'll be cooler then anyway! Iain ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2242 / Virus Database: 3204/5998 - Release Date: 07/17/13 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2242 / Virus Database: 3204/5998 - Release Date: 07/17/13 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
If you Google Anthorn you get a page with data on quite a few VLF and other time stations. -- Chuck Forsberg WA7KGX c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] eLoran announcement in the UK
http://www.loran-europe.eu has details of european transmitters. Anthorn in the uk has a power of 250kW On 17 July 2013 17:31, J. Forster j...@quikus.com wrote: Do you have any idea of the transmitter power/antenna gain? The relatively low power of the UK 60 kHz is strong enough to interfere w/ WWVB in MA, so I'm wondering if the UK eLORAN might be usably strong. -John === Not the first time this has been mentioned but another confirmation of the GPS alternative and eLoran stations to be rolled out across UK http://eandt.theiet.org/news/2013/jul/eloran-rollout.cfm?utm_source=Adestrautm_campaign=E%26T%20News%20fortinightly%20-AUTOMATION%20VERSION-%20membersutm_medium=Newsletters-E%26T%20Newsutm_content=E%26T%20News%20-%20Membersutm_term=http%3A%2F%2Feandt.theiet.org%2Fnews%2F2013%2Fjul%2Feloran-rollout.cfmutm_contact=17085095 /A navigation system resilient to GPS jamming will be installed along the south and east coast of the UK, it was announced today./ /Following approval by the Department for Transport, seven differential eLoran stations will be installed to provide alternative position, navigation and timing (PNT) information to ensure that ships equipped with eLoran receivers can navigate safely in the event of GPS failure in one of the busiest shipping regions in the world./ /The GPS signals most ships rely on are vulnerable to both deliberate and accidental jamming, which is causing increasing concern because of the wide availability of GPS jammers online for as little as £30 that are capable of causing complete outages across all receivers currently on the market./ /The rollout, led by the General Lighthouse Authorities (GLAs) of the UK and Ireland, is the first in the world to deploy this technology for shipping companies operating both passenger and cargo services./ . etc Regards David (I've designed built off air standards for 60kHz MSF, 198kHz BBC radio4 and GPS so it looks another project just added to the DO list) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
