[time-nuts] Suggest time-and-tech related locations in Switzerland

2018-03-19 Thread David Witten
Many thanks to everyone who provided suggestions regarding time-and-tech (and other) things to see in Switzerland! I am working through the suggestions. My wife (and mostly) I hope to pack in as many of them as possible. I also look forward to meeting any of you who plan to attend the

[time-nuts] Suggest time-and-tech related locations in Switzerland

2018-03-13 Thread David Witten
My wife and I are traveling to Switzerland for the last week in May. I have never been there before. I would appreciate suggestions for time / tech sites of interest to visit. We plan to fly to Zurich, but travel immediately to Geneva and then work our way back to Zurich by train, stopping (at

Re: [time-nuts] precision frequency/time/amplitude reference

2017-10-09 Thread David Witten
Jim, If I understand what you are attempting (I may well not), you might consider the approach taken here: https://github.com/tejeez/rtl_coherent and here: https://github.com/tejeez/rtl_coherent/blob/master/hardware/simple/README.md or order a noise-source and antenna switches from here:

Re: [time-nuts] u-blox NEO-M8T GPS initial tracking test

2017-02-12 Thread David Witten
This behavior is described in the document: u-blox 8/M8 Firmware v 3.01 for Standard Precision GNSS, Release Notes This document says, among other things,: "New multi-GNSS messages use UTC as

[time-nuts] u-blox NEO-M8T GPS initial tracking test

2017-02-09 Thread David Witten
I am doing similar tests, seeing similar results. I have 5 x NEO-M8T's, 3 M6T', 4 Skytrack Venus 838Lp-T's. Mostly have Toaglas triple band antennas on PCB groundplanes with LNA-SAW-LNA conditioning in line. I have built a three arm test rig (arm < =1.5 M) for testing RTK measurments, etc.

[time-nuts] Nuclear transition for time reference - Nature 5-May, 2016, vol 533

2016-05-23 Thread David Witten
My knowledge in this area is superficial. But I wondered if anyone in this group had a reaction to the 5-May issue of nature that includes a 'News and Views' piece and a formal article reporting the detection by Von der Wense et al. of the 229m Thorium nuclear transition that is hoped to have