Re: [time-nuts] WTB: HP/Agilent/Symmetricom 58517A Distribution Amplifier

Just a heads up, in case you’re not concious of the fact; at least my HP splitter (can’t recall model# off hand) is strictly L1 - many others are wide band and will allow L2 and whatever else you might later want. Ole > 18. mai 2018 kl. 16:35 skrev Clay Autery : > >

Re: [time-nuts] nuts about position (Michael Wouters)

Here is a pretty good paper (as far as I can tell) from 2017 looking at ways to improve single frequency results: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5492347/ > 28. apr. 2018 kl. 06:20 skrev Jerome Blaha : > > Real-time GPS <0.3m accuracy is quite possible

Re: [time-nuts] RINEX for Android

I think teqc.exe can read ubx-files directly Ole > 12. apr. 2018 kl. 12:46 skrev jimlux : > > It turns out that some of the newer Android phones support an API which > returns raw GNSS data and that can be logged to a file in RINEX format. > There's a few apps out there

Re: [time-nuts] Rinex Data Stream

Depending on the receiver, the manufacturer usually provides a conversion utility. No such thing as a RINEX «stream» though, as far as I know. The observations are usually collected in a vendor specific (or sometimes neutral, like BINEX) format, and then converted to RINEX in batch. Ole >

Re: [time-nuts] Next upgrade

I guess everyone has seen this, but Linear has a nice appnote «A Standards Lab Grade 20-Bit DAC with 0.1ppm/°C Drift» http://cds.linear.com/docs/en/application-note/an86f.pdf Ole > 26. nov. 2017 kl. 13:50 skrev Magnus Danielson : > > Hi > >> On 11/26/2017 02:26

Re: [time-nuts] H-Maser drift (was: Why discipline Rubidium oscillator?)

Hi, Dana. > What does 'EFOS' mean? I hadn't heard the term before. EFOS was a series of masers made by Oscilloquartz in Switzerland, there is a little information on my website www.efos3.com under «about». The manuals for those masers are also available, lots of good info for the interested:

Re: [time-nuts] Time and frequency practical exercise 2018 late quarter; precision measure of 432mhz band Sat in Lunar Orbit

Pat, I am not a ham, but would be interested in participating if there is someone in my neck of the woods that needs access to timing gear. I am in western norway, near stavanger. I have a hydrogen maser and many other precision oscillators. Ole > 17. nov. 2017 kl. 22:26 skrev Patrick

Re: [time-nuts] a link to a explanation of Rb vs Cs?

A little of the thinking, and a bit of the history of the rb v cs is in "CESIUM AND RUBIDIUM FREQUENCY STANDARDS STATUS AND PERFORMANCE ON THE GPS PROGRAM" http://www.stanson.ch/files/GPS/Vol%2027_14.pdf Ole > Den 12. apr. 2017 kl. 08.41 skrev Hal Murray : > > >

Re: [time-nuts] Thermal effects on cables --> ADEV

That IS interesting.. It reads to me that the advice is to keep a "moving 300 pt ADEV" when continously monitoring a (pair of) frequency source in e.g a VLBI site - the reason for limiting it to 300 pts being that much more than that is likely to average out potential issues.. Does that make

Re: [time-nuts] hm H Maser

"The European Commission and the European Space Agency have approved the Galileo GNSS programme. Two experimental satellites will be launched in late 2005 or early 2006. Atomic clocks are critical for satellite navigation. After more than ten years of development and an overall budget of € 30M,

Re: [time-nuts] hm H Maser

... having said that, I for one think I'm with Bob on this one. The thing about masers are that they are big. At least active masers. And they require a substantial volume be kept at ultra high vacuum - which is not trivial, especially not in a homeshop. The cavity needs to be kept at a

Re: [time-nuts] NCOCXO anyone?

SpectraDynamics HROG 5/10 http://www.spectradynamics.com/products/hrog-10-high-resolution-phase-and-frequency-offset-generator/ On 22. jul. 2016, at 09.49, Anders Wallin wrote: >> rich...@karlquist.com said: >>> Also in 1996, phase microsteppers were already legacy

Re: [time-nuts] MicroPulse L1/L2 Surveying Antenna

I recently also searched for details on a Micro Pulse antenna - I finally got a datasheet from PCTEL support, who (presumably) took over the Micro Pulse range at some point. > On 30. jan. 2016, at 19.17, Dan Rae wrote: > > Does anyone have any details on the above