Re: [time-nuts] high (spacial) precision GPS in Kickstarter

2014-01-25 Thread Anders Wallin
AFAIK 'normal' RTK does not provide a clock solution. There's something called 4D RTK which does: http://saegnss1.curtin.edu.au/Publications/2010/Feng2010Four.pdf apparently the results can be very good - but I think the errors quoted are for time-transfer between two RTK receivers (?). If there

[time-nuts] Z3815 receiver transplant now fixed

2014-01-25 Thread Morris Odell
Hi all, Well I've got it working absolutely perfectly now. My thanks to Dave Brown of this list who sent me a manual for the GT-74! The problem wasn't the receiver output message but the unusual antenna feed situation in the Z3815 that baffled me for a while. Briefly, GPS receivers feed the

Re: [time-nuts] high (spacial) precision GPS in Kickstarter

2014-01-25 Thread Magnus Danielson
On 25/01/14 11:42, Anders Wallin wrote: AFAIK 'normal' RTK does not provide a clock solution. There's something called 4D RTK which does: http://saegnss1.curtin.edu.au/Publications/2010/Feng2010Four.pdf apparently the results can be very good - but I think the errors quoted are for time-transfer

Re: [time-nuts] Morion MV89A position

2014-01-25 Thread Magnus Danielson
On 24/01/14 09:12, Azelio Boriani wrote: This issue has been discussed at length several times. Too much insulation is not necessarily desirable since the oscillator power has to be dissipated and the oven design of the MV89 wasn't meant to be put in a dewar. Better reduce the temperature

Re: [time-nuts] Z3815A date problem fixed?

2014-01-25 Thread Magnus Danielson
On 24/01/14 11:59, Morris Odell wrote: Hi all, There was some consternation here 5 months ago when Z3815A GPSDOs began reporting a date 1024 weeks in the past. This was due to a storage overflow condition in the Furuno GPS receiver in the Z3915A. The designers probably never anticipated that

[time-nuts] Help OCXO ID

2014-01-25 Thread Francesco Messineo
Hello all, does anyone know what's the OCXO (or else) in this picture? http://www.electronicsurplus.it/open2b/var/catalog/images/1354/0-c26b2bc0-800.jpg I'm trying to understand if it's something worth buying, but I can't find any information on the site other than 5 MHz oven quartz oscillator

Re: [time-nuts] high (spacial) precision GPS in Kickstarter

2014-01-25 Thread Henry Hallam
I know the Swift Nav guys and they are working on adding various forms of customizable timing inputs and outputs to the Piksi. It's also an open-source project, so it's pretty flexible in that regard. Henry On Sat, Jan 25, 2014 at 4:56 AM, Magnus Danielson mag...@rubidium.dyndns.org wrote: On

Re: [time-nuts] high (spacial) precision GPS in Kickstarter

2014-01-25 Thread Magnus Danielson
On 25/01/14 22:32, Henry Hallam wrote: I know the Swift Nav guys and they are working on adding various forms of customizable timing inputs and outputs to the Piksi. It's also an open-source project, so it's pretty flexible in that regard. When I looked at it, it was obviously missing. The

Re: [time-nuts] Z3815A date problem fixed?

2014-01-25 Thread Morris Odell
Thanks for the reply Magnus. I know the frequency control function is unaffected by the date problem but I'm far too obsessional to ignore it :-) I contemplated the AVR solution to correct the code but once I looked at the output of the receiver with a MAX232 as suggested here, I found there were