Oops - wrong URL for tvb plot!
OK. I'll see what I can do. I beleive I already have something, but I think I
will have to massage it to do anything but ascii-tables.
The phase and frequency offsets will naturally be canceled out by ADEV and
MDEV. It is interesting to plot compensated and non-compensated data alongside
each other with the drift there too.
What do you use for generating the plots? GnuPlot?
Magnus,
In some cases, given raw phase data, I compute plain adev
and overlapping adev using my free adev.exe tool; see
http://www.leapsecond.com/tools/adev1.htm
For more elaborate calculations I use Stable32.
http://www.wriley.com/
You can plot or save tau/adev files form this.
For plotting quickly I screen capture plots from Stable32.
Some GIF's in http://www.leapsecond.com/pages/3gps/
were done that way.
For fancier plotting I extract tau/adev pairs from either
adev1 or Stable32 and make pretty log/log plots using
Excel; MRTG, gnuplot, grace are alternatives.
If anyone has other favorite plotting methods, please let
us know.
/tvb
Tom Van Baak wrote:
For fancier plotting I extract tau/adev pairs from either
adev1 or Stable32 and make pretty log/log plots using
Excel; MRTG, gnuplot, grace are alternatives.
For those working in the *nix world, let me put in a plug for grace
(plasma-gate.weizmann.ac.il/Grace/ ).
It's a quite capable plotting tool, and what's really nice is that with
the appropriate incantations it can operate in either interactive
WYSIWYG mode or in batch mode from the command line (or a script).
I've also figured out a way (with the help of an external perl script)
to modify the basic plot parameters on the fly, so I can automagically
generate customized plots without having to manually edit the grace
configuation (that's my stable-stats program -- a bit of info is at
http://www.febo.com/time-freq/tools).
What's cool is that I can use the interactive mode to design a pretty
chart, and then use the batch mode to automatically update it with new data.
As a famously obnoxious computer columnist used to say, "highly
recommended."
John
John,
I need your advise on the Gibraltar project. Is there a good time that we
could speak on the phone?
Rick
W2GPS
AMSAT LM2232
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of John Ackermann N8UR
Sent: Wednesday, April 11, 2007 8:39 AM
To: Tom Van Baak; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Oops - wrong URL for tvb plot!
Tom Van Baak wrote:
For fancier plotting I extract tau/adev pairs from either
adev1 or Stable32 and make pretty log/log plots using
Excel; MRTG, gnuplot, grace are alternatives.
For those working in the *nix world, let me put in a plug for grace
(plasma-gate.weizmann.ac.il/Grace/ ).
It's a quite capable plotting tool, and what's really nice is that with
the appropriate incantations it can operate in either interactive
WYSIWYG mode or in batch mode from the command line (or a script).
I've also figured out a way (with the help of an external perl script)
to modify the basic plot parameters on the fly, so I can automagically
generate customized plots without having to manually edit the grace
configuation (that's my stable-stats program -- a bit of info is at
http://www.febo.com/time-freq/tools).
What's cool is that I can use the interactive mode to design a pretty
chart, and then use the batch mode to automatically update it with new data.
As a famously obnoxious computer columnist used to say, "highly
recommended."
John
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