One needs to know the carrier frequency. Must be a high quality reference
for the Cassini transmitter.
On 04/03/2014 08:17 PM, Chris Albertson wrote:
I just read about a discovery of a liquid water ocean on Saturn's moon
Enceladus. The method used was to measure the velocity of a
spacecraft
Hi
Back when they were designing this stuff, they were very interested in getting
into the parts in 10 to the 15th. They didn’t get there, but that was the
desire.
Bob
On Apr 4, 2014, at 2:17 AM, Chuck Forsberg WA7KGX c...@omen.com wrote:
One needs to know the carrier frequency. Must be a
On 4/3/14 8:17 PM, Chris Albertson wrote:
I just read about a discovery of a liquid water ocean on Saturn's moon
Enceladus. The method used was to measure the velocity of a
spacecraft as it makes a close fly-by. Gravitational anomalies will
cause the spacecraft to speed up or slow down as it
On 4/3/14 11:17 PM, Chuck Forsberg WA7KGX wrote:
One needs to know the carrier frequency. Must be a high quality reference
for the Cassini transmitter.
Two way measurements are most likely here (although Cassini does carry a
USO). So the downlink is locked to the uplink which comes from a
Original Message
Subject: [BARC-List] [Flea@MIT] New England Ham - Electronic Flea Market
Dates * April * update
From:New England Area Ham - Electronic Flea Market f...@mit.edu
Date:Thu, April 3, 2014 3:05 pm
To: f...@mit.edu
On 4/4/14 4:30 AM, Bob Camp wrote:
Hi
Back when they were designing this stuff, they were very interested in getting
into the parts in 10 to the 15th. They didn’t get there, but that was the
desire.
Roughly that...
http://lasp.colorado.edu/~horanyi/graduate_seminar/RSS.pdf is a good
Jim,
Thanks for sharing the details and preventing this subject from turning
into shared ignorance.
Bill Hawkins
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On 4 Apr 2014 08:55, Tom Knox act...@hotmail.com wrote:
90 microns is approx a freq res of about 1 x 3.66 -12
Thomas Knox
Since the Doppler shift is prortional to the frequency, I can't see how
one can determine the absolute frequency.
But given light travels at 3e8 m/s and they can
On 4/4/14 7:39 AM, Bill Hawkins wrote:
Jim,
Thanks for sharing the details and preventing this subject from turning
into shared ignorance.
It was working on this kind of thing that led me to time-nuts in the
first place..
Deep Space nav is probably one of the most precise measurements made
You are correct. I did most in my head late last night and kind of lost my
focus as I was finishing. I was attempting to see roughly what timing accuracy
was needed. I meant to end the sentence with a question mark.
Thomas Knox
Date: Fri, 4 Apr 2014 13:01:12 +0100
From: drkir...@gmail.com
On 4/4/14 5:01 AM, Dr. David Kirkby wrote:
On 4 Apr 2014 08:55, Tom Knox act...@hotmail.com wrote:
90 microns is approx a freq res of about 1 x 3.66 -12
Thomas Knox
Since the Doppler shift is prortional to the frequency, I can't see how
one can determine the absolute frequency.
But
On Fri, Apr 4, 2014 at 6:19 AM, Jim Lux jim...@earthlink.net wrote:
Radio science and navigation measurements are quite impressive in their
accuracy and attention to detail. measuring range to cm (out of a billion
km, i.e 1 part in 1E14) and velocity to mm/s is sort of standard.
Looks to be
On 4/4/14 9:34 AM, Chris Albertson wrote:
On Fri, Apr 4, 2014 at 6:19 AM, Jim Lux jim...@earthlink.net wrote:
Radio science and navigation measurements are quite impressive in their
accuracy and attention to detail. measuring range to cm (out of a billion
km, i.e 1 part in 1E14) and velocity
gravitation measurement, particularly gravitation measurement in space
is based on the Eotvos -effect see here:
http://en.wikipedia.org/wiki/E%C3%B6tv%C3%B6s_effect and here:
http://en.wikipedia.org/wiki/Lor%C3%A1nd_E%C3%B6tv%C3%B6sand from
the begin of the space exploration many space
On 4/4/14 9:58 AM, Alex Pummer wrote:
gravitation measurement, particularly gravitation measurement in space
is based on the Eotvos -effect see here:
http://en.wikipedia.org/wiki/E%C3%B6tv%C3%B6s_effect and here:
http://en.wikipedia.org/wiki/Lor%C3%A1nd_E%C3%B6tv%C3%B6sand from
the begin
Hi,
With all the recent talk of interpolators, I started looking at the
acam TDC chips again - the GP22 is pretty cheap now for anyone who's
up for playing with the tiny QFN package.
I was wondering if anyone here has tried them or properly evaluated
them as a TIC - especially the
Angus
An interesting chip. I had never heard of it before and suspect this may be
the gizmo used in closed system water leak detection. Won't go into why I
know about that.
I did find comments from 2007 about the chip and atmega but nothing since.
When I went looking for distributors or pricing to
Hello everyone,
sorry for the plug, but we just announced a new $568 complete GPSDO
reference kit.
This unit is a tiny desktop unit with 10m antenna, power supply, cables,
CD, and other accessories. It is a low cost addition to our Fury GPSDO line,
and contains a really good TCXO, a
If you are going to plug the unit re time nuts, how about a price break for
said group?
Michael
On Fri, Apr 4, 2014 at 3:39 PM, saidj...@aol.com wrote:
Hello everyone,
sorry for the plug, but we just announced a new $568 complete GPSDO
reference kit.
This unit is a tiny desktop unit with
Michael,
I was able to get a $50 Time-Nuts discount from the marketing guys..
Just mention $50 time nuts discount..
Bye,
Said
Sent From iPhone
On Apr 4, 2014, at 15:58, Michael Perrett mkperr...@gmail.com wrote:
If you are going to plug the unit re time nuts, how about a price break for
Hi Said:
Can you say more about what this means?
It generates a low-noise 10MHz signal with typically better than 1E-010 precision
and accuracy (0.1ppb) on average
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
saidj...@aol.com wrote:
Hello
On 4 Apr 2014 23:39, saidj...@aol.com wrote:
Hello everyone,
sorry for the plug, but we just announced a new $568 complete GPSDO
reference kit.
Given the low power consumption I assume that this doesn't use an oven.
That means if it does lose GPS lock, the frequency is going to drift much
Received my M12+T and would like to gather parts to get it running and
tested.
I've looked through the manual for a battery type description and couldn't
find one. Anyone know of a part number for the onboard battery I could
reference?
Also looking for a mating cable/connector for the 10pin
Wow. Seriously I was just going to post about my $35 GPSDO. I've used
some discipline to not say for just a little more I can get... and gone
the lowest cost route at each decision point. Just to see what happens.
Price does not include GPS receiver, plug-in power cube and case and I'm
not
I mean no disrespect to anyone here. Jacksonlabs makes some very fine
components. Brookes comment was spot on. What happens etc. I did run out to
the site and take a quick read. The short piece I read did not have a lot
of specifics or I simply missed them. It is low power and thats quite a
plus,
Check out the semi-Arduino + OLED LCD that Sparkfun will be selling soon...
it's tiny, fairly cheap, and can run on 3.3 to 18 volts. Looks like it will
be very useful for a lot of small projects. Unfortunately, the OLED does not
appear to have a touch screen.
Jim,
Can't help you with the on-board battery as my M12+T's were the optional
external battery types. But as for the connector, I got both PCB-mount and
IDC-type cable assemblies as free samples from Samtec. Can't seem to find the
part numbers at the moment but can dig for them if you need.
Hi guys,
Let me try to answer the questions.
This unit is placed to fill a need for lower cost plug-and-play units than what
our Fury offers. The Fury desktop DOCXO sells for around $1700 if I am not
mistaken, and literally 100's of them are sold every year. This is not trying
to address a
Paul,
Forgot to mention, there is a spec sheet on the website on the LC-XO-Plus
product page with additional technical details.
Bye,
Said
Sent from my iPad
On Apr 4, 2014, at 17:45, paul swed paulsw...@gmail.com wrote:
I mean no disrespect to anyone here. Jacksonlabs makes some very fine
The data connector is a standard 0.05 inch double row of male headers.
These are common but not nearly so common as the 0.1 type. I used a 2032
coin cell battery and holder I un-soldered from an dead PC motherboard.
Even a coin cell will last its shelf life at least.
You will need to level shift
Said,
I looked through the literature on your website, but didn't see any pictures of
the inside of the unit. I'm curious to see the board and component compliment.
Regards,
Brent
On Apr 4, 2014, at 20:19, Said Jackson saidj...@aol.com wrote:
Paul,
Forgot to mention, there is a spec
What will these cost? They will be great for lots and lots of uses but the
price determine how that are used.
I can buy a 84x48 pixel graphic display for $2.80 shipped. (see ebay
201039107368)
and it is very easy to add one of these to a project.
I'm kind of stuck on an input device, a 12 key
Hi Brent,
I guess thats a trade secret until you buy one :)
Bye,
Said
Sent From iPhone
On Apr 4, 2014, at 18:50, KD0GLS kd0...@mninter.net wrote:
Said,
I looked through the literature on your website, but didn't see any pictures
of the inside of the unit. I'm curious to see the board and
On 4/4/14 6:51 PM, Chris Albertson wrote:
The data connector is a standard 0.05 inch double row of male headers.
These are common but not nearly so common as the 0.1 type. I used a 2032
coin cell battery and holder I un-soldered from an dead PC motherboard.
Even a coin cell will last its shelf
On 4/4/14 5:45 PM, paul swed wrote:
I mean no disrespect to anyone here. Jacksonlabs makes some very fine
components. Brookes comment was spot on. What happens etc. I did run out to
the site and take a quick read. The short piece I read did not have a lot
of specifics or I simply missed them. It
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