Le 02/08/2011 04:35, Michael Sokolov a écrit :
snip
Henry Hallamhe...@pericynthion.org wrote:
The parameters you'll want for conversion between MCAT and mean solar
time are given daily in the IERS bulletins:
http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletins.html
Yes, I know.
By
Hello again,
Thank you all for your recommendations. It looks like I will go with a
ThunderBolt: I have found Trimble's manual online, read all of it, and
it looks like the unit will do exactly what I am after.
I will feed all 3 outputs from the TBolt (10 MHz, 1 PPS, EIA-232) to a
custom
On Tue, Aug 2, 2011 at 9:12 AM, Michael Sokolov
msoko...@ivan.harhan.org wrote:
Hello again,
Thank you all for your recommendations. It looks like I will go with a
ThunderBolt: I have found Trimble's manual online, read all of it, and
it looks like the unit will do exactly what I am after.
Chris Albertson albertson.ch...@gmail.com wrote:
Why such complex a system when you don't need it?An FPGA???
Fixing a logic mistake in an FPGA involves editing a Verilog source file
and recompiling; fixing a logic mistake in discrete logic involves a
board respin. I much prefer editing
As someone who is currently tinkering with a design in an fpga I had to smile
at that statement. :-)
If you want the edit + compile, then you may want to rethink that part. There
are plenty of microcontrollers
out there that are significantly easier to get going. And yes, you can do
things
On 08/01/2011 10:58 PM, b...@lysator.liu.se wrote:
I did find Pope's site earlier after looking for Dewar flasks on eBay.
They don't have one that's close enough in size to be worth the cost
premium over a standard Thermos bottle. Same with a Google search for
other Dewar
On Tue, Aug 2, 2011 at 9:52 AM, Michael Sokolov
msoko...@ivan.harhan.org wrote:
Fixing a logic mistake in an FPGA involves editing a Verilog source file
and recompiling; fixing a logic mistake in discrete logic involves a
board respin. I much prefer editing ASCII text source files and
Chris Albertson albertson.ch...@gmail.com wrote:
NTP software can keep system time within a few milliseconds of UTC.
No custom hardware, no FPGA or PCB.
But I _*REFUSE*_ to do it that way. You've mentioned UTC: that's one
thing I'm taking great care to avoid in my solution. I want my system
If you live your life on a timescale that is anchored to mean solar time,
what happens on February 29th?
Chris
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Michael Sokolov
Sent: 02 August 2011 20:33
To: time-nuts@febo.com
At 05:33 PM 8/2/2011, Chris Stake wrote...
If you live your life on a timescale that is anchored to mean solar
time,
what happens on February 29th?
Nothing. From the OP:
I want MJD numbers instead of Gregorian dates, or GPS week numbers /
day-of-week / time-of-day.
I don't get it.
Does that mean that leap days are OK but leap seconds are unacceptable?
Chris
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mike S
Sent: 02 August 2011 23:02
To: Discussion of precise time and frequency
On Tue, Aug 2, 2011 at 3:49 PM, Chris Stake st...@btinternet.com wrote:
I don't get it.
Does that mean that leap days are OK but leap seconds are unacceptable?
It's even less logical than that. With rubber seconds tied to the
Earth's rotation. You ultra stable cesium clock is no longer
Le 03/08/2011 00:49, Chris Stake a écrit :
I don't get it.
Does that mean that leap days are OK but leap seconds are unacceptable?
Chris
For the moment yes, as they are animals from two different species. Leap
seconds form part of the current definition of UTC which is a time
scale, even
Yep, Lady Heather does several versions of the Mayan, Aztek, and Druid
calendars you can specify the correlation constant to suit your
interpretation of the reference date.
That said of all the systems I like the Mayan one best. They defined the year
as 360 days.
Michael,
You are entitled to your opinions, but opinions that cannot be expressed with
civility like those in the message below have no place on this list.
You are welcome to keep them for yourself.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original
Here's the latest plot from my TEC test rigs. Y-axis is phase error
(in 60 Hz cycles), X-axis is time in MJD. The plot starts at 7AM local time.
http://n5tnl.com/tec/tec_test_01.png
Same serial connected embedded hardware, timestamped on the receipt
of first character. One machine (red
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