Hi
Pulsars are an interesting clock. That by no means equates to them being a
better clock than an ion standard or possibly a neutron standard. If you look
at ADEV numbers, there's pretty much no way a pulsar will be anywhere near the
level a good atomic clock can deliver over useful time
The same issue we have for rotating clocks on board of GPSes and
differently rotating clocks on the Earth's surface?
On Fri, Mar 30, 2012 at 12:02 AM, Bob Camp li...@rtty.us wrote:
Hi
Pulsars are an interesting clock. That by no means equates to them being
a better clock than an ion standard
El 30/03/2012 05:02, Jim Lux escribió:
and orientation. Sort of like a super star tracker all in one! (You
can see why NASA is interested..)
And ESA. Last year they published an invitation to tender called Deep
Space Navigation with Pulsars, with the following description excerpt:
The
act...@hotmail.com said:
Forth: The problems I foresee are can an practical algorithm accounting for
the complex motion of all these bodies be built ...
Radio astronomers are pretty good at that sort of calculation. Google for
VLBI.
The key step for VLBI is modeling the exact location of
On Wed, 28 Mar 2012 16:20:49 -0700
Hal Murray hmur...@megapathdsl.net wrote:
All that is of course correct. But ultimately the pulsars are a better
source, I see it as an application question, could it be utilized? Perhaps
building an algorithm and basing corrections on multiple pulsars
On 03/29/2012 01:50 AM, Jim Palfreyman wrote:
Folks, I'm currently writing my thesis on pulsars, but I need to spend time
on it rather than here. :-) But since a lot of this discussion is right at
the front of my brain, here's a summary.
Some pulsars glitch or speed up. The Vela pulsar (PSR
On 3/29/12 3:17 PM, Magnus Danielson wrote:
just so we can re-transmit it, is probably not sensible. However,
studies of these remarkable pulsars is ongoing.
Hmm, wouldn't the space-located antenna have a good chance of better S/N
as the antenna sees cold space and could be kept cold itself?
:33 +0200
From: mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Subject: Re: [time-nuts] Pulsar Source?
On 03/29/2012 01:50 AM, Jim Palfreyman wrote:
Folks, I'm currently writing my thesis on pulsars, but I need to spend time
on it rather than here. :-) But since a lot of this discussion
On 3/28/2012 4:50 PM, Jim Palfreyman wrote:
Folks, I'm currently writing my thesis on pulsars, but I need to spend time
on it rather than here
I'd love to hear more about your thesis (offline question most likely).
I thought I'd add in the detail that I found on another site about one
time source.
That's the hard part.
I have really enjoyed all the topics lately
thanks all for the contributions. Clearly Time Nuts; Thomas Knox
Date: Fri, 30 Mar 2012 00:17:33 +0200 From:
mag...@rubidium.dyndns.org To: time-nuts@febo.com Subject: Re:
[time-nuts] Pulsar Source?
On 03/29
Jim,
If you look at some atomic clocks, they really do look like they were
built in somebody's basement... out of WW II RADAR parts and Home Depot
plumbing fittings.
-John
On 3/29/12 6:19 PM, Tom Knox wrote:
I thought I might apologize because I didn't explain my idea very
If pulsars are natures best clocks, I wonder how practical it would be to use
satellites to receive and rebroadcast a highly accurate timing signal based on
their signals?
Thomas Knox
___
time-nuts mailing
On Wed, Mar 28, 2012 at 11:29 AM, Tom Knox act...@hotmail.com wrote:
If pulsars are natures best clocks, I wonder how practical it would be to use
satellites to receive and rebroadcast a highly accurate timing signal based
on their signals?
The problem is in the rebroadcasting which will
What would it take (how big a dish) to receive a pulsar directly, such
as the millisecond one in the Crab Nebula? DBTV, TVRO?
David
On 3/28/12 2:29 PM, Tom Knox wrote:
If pulsars are natures best clocks, I wonder how practical it would be to use
satellites to receive and rebroadcast a
Subject: Re: [time-nuts] Pulsar Source?
What would it take (how big a dish) to receive a pulsar directly, such
as the millisecond one in the Crab Nebula? DBTV, TVRO?
David
On 3/28/12 2:29 PM, Tom Knox wrote:
If pulsars are natures best clocks, I wonder how practical it would be to use
satellites
On Wed, Mar 28, 2012 at 12:16 PM, David McGaw n1...@alum.dartmouth.org wrote:
What would it take (how big a dish) to receive a pulsar directly, such as
the millisecond one in the Crab Nebula? DBTV, TVRO?
Amateurs have observed it using Yagi type antenna. You'd need at
least a pair of them
of conventional GPS.
Thomas Knox
From: albertson.ch...@gmail.com
Date: Wed, 28 Mar 2012 12:13:24 -0700
To: time-nuts@febo.com
Subject: Re: [time-nuts] Pulsar Source?
On Wed, Mar 28, 2012 at 11:29 AM, Tom Knox act...@hotmail.com wrote:
If pulsars are natures best clocks, I wonder how practical
measurement
time-nuts@febo.com
Sent: Wed, March 28, 2012 3:16:03 PM
Subject: Re: [time-nuts] Pulsar Source?
What would it take (how big a dish) to receive a pulsar directly, such
as the millisecond one in the Crab Nebula? DBTV, TVRO?
David
On 3/28/12 2:29 PM, Tom Knox wrote:
If pulsars
measurment.
-Brian, WA1ZMS
- Original Message
From: David McGaw n1...@alum.dartmouth.org
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Wed, March 28, 2012 3:16:03 PM
Subject: Re: [time-nuts] Pulsar Source?
What would it take (how big
To: n1...@alum.dartmouth.org; time-nuts@febo.com
Subject: Re: [time-nuts] Pulsar Source?
On Wed, Mar 28, 2012 at 12:16 PM, David McGaw n1...@alum.dartmouth.org
wrote:
What would it take (how big a dish) to receive a pulsar directly, such as
the millisecond one in the Crab Nebula? DBTV
All that is of course correct. But ultimately the pulsars are a better
source, I see it as an application question, could it be utilized? Perhaps
building an algorithm and basing corrections on multiple pulsars x-ray
pulses like a GPS constellation for the next generation of conventional GPS.
Ultimately all pulsars slow down. Pulsars are rotating neutron stars.
We see the pulse whenever the beam from one of the poles points in our
direction. A pulsar emits a massive amount of energy and there is drag
from the rotating magnetic field in its stellar environment. There is
also
Folks, I'm currently writing my thesis on pulsars, but I need to spend time
on it rather than here. :-) But since a lot of this discussion is right at
the front of my brain, here's a summary.
Some pulsars glitch or speed up. The Vela pulsar (PSR J0835-4510) does
this (this is the pulsar I've been
On 3/28/12 1:11 PM, Tom Knox wrote:
My thought was to rec it in space before it is degraded and perhaps rec it in
the x-ray region. A few Geo Sync Sats doing a correction algorithm for earth
position vs the pulsars would not be that complex.
Thomas Knox
What you're talking about is
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