It is more a matter about that the involved technology could be ITAR
classified or with other export restrictions. Ask Hughes and Boeing
about the fine for export control violations in Intelsat 708 :)
http://en.wikipedia.org/wiki/Intelsat_708
I think most people who work with rockets with
El 10/03/2011 15:35, jimlux escribió:
Heck, every time I buy parts at home, it seems the packing slip always
has some sort of generic these parts may be subject to export
controls notice on it. Yep.. those 10Meg resistors just might be a
vital piece of an armament...
This remembers me
On 3/8/11 9:57 AM, Kevin Watson wrote:
Hi Jim,
As part of my research into keeping time on rockets and spacecraft, I
joined
this list to see what I could learn from the masters. Of course I'm a
knuckle-head for not assuming that you'd be one of the resident masters
grin. Anyway, as my accuracy
On 3/8/11 11:41 AM, Chris Albertson wrote:
On Tue, Mar 8, 2011 at 9:57 AM, Kevin Watsontime-n...@enuuf.com wrote:
Hi Jim,
As part of my research into keeping time on rockets and spacecraft, I joined
this list to see what I could learn from the masters. Of course I'm a
knuckle-head for not
On 3/8/11 1:45 PM, Magnus Danielson wrote:
Kevin,
On 03/08/2011 06:57 PM, Kevin Watson wrote:
Hi Jim,
snip
Do you, or anyone else, have a recomendation for the GPSDO? Jackson Labs'
(http://jackson-labs.com/) DROR seems like it might work, but I wonder if
there might be better alternatives.
On 3/8/11 11:05 PM, Magnus Danielson wrote:
On 03/09/2011 06:08 AM, Kevin Watson wrote:
Hi All. Thanks for responding. There are quite a few GPS receivers that
will work outside of the usual commercial-grade GPS limitations, but I'm
not too sure I need such a receiver. As my application is to
. For this, I need the time source on the
rocket. Using a GPSDO in holdover mode seems like a good solution.
-Kevin
- Original Message -
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Sent: Tuesday, March 08, 2011 11:05 PM
Subject: Re: [time-nuts] Spacecraft
Sent: Wednesday, March 09, 2011 6:15 AM
Subject: Re: [time-nuts] Spacecraft Timekeeping
On 3/8/11 11:05 PM, Magnus Danielson wrote:
On 03/09/2011 06:08 AM, Kevin Watson wrote:
Hi All. Thanks for responding. There are quite a few GPS receivers that
will work outside of the usual commercial-grade
On 03/09/2011 03:09 PM, jimlux wrote:
On 3/8/11 1:45 PM, Magnus Danielson wrote:
Kevin,
On 03/08/2011 06:57 PM, Kevin Watson wrote:
Hi Jim,
snip
Do you, or anyone else, have a recomendation for the GPSDO? Jackson
Labs'
(http://jackson-labs.com/) DROR seems like it might work, but I
wonder
On 03/09/2011 03:15 PM, jimlux wrote:
On 3/8/11 11:05 PM, Magnus Danielson wrote:
On 03/09/2011 06:08 AM, Kevin Watson wrote:
Hi All. Thanks for responding. There are quite a few GPS receivers that
will work outside of the usual commercial-grade GPS limitations, but I'm
not too sure I need
Kevin,
On 03/09/2011 06:39 PM, Kevin Watson wrote:
Magnus,
Drop the receiver and antenna out of the equation and
just provide a timing signal on launch pad...
I need to keep computers time synchronized from launch through at least
arrival on orbit so that time-tagged network messages can be
...@rubidium.dyndns.org
To: time-nuts@febo.com
Sent: Wednesday, March 09, 2011 10:25 AM
Subject: Re: [time-nuts] Spacecraft Timekeeping
Kevin,
On 03/09/2011 06:39 PM, Kevin Watson wrote:
Magnus,
Drop the receiver and antenna out of the equation and
just provide a timing signal on launch pad...
I need
On 03/09/2011 07:58 PM, Kevin Watson wrote:
Hi Magnus,
As I said in an earlier message, this is an experiment that I want to
run and would rather not touch mission and safety-critical GNC
components, like our navigation GPS receivers. Mass is not an issue.
In that case, take a Thunderbolt,
On 3/9/11 10:58 AM, Kevin Watson wrote:
Hi Magnus,
As I said in an earlier message, this is an experiment that I want to
run and would rather not touch mission and safety-critical GNC
components, like our navigation GPS receivers. Mass is not an issue.
-Kevin
So this makes it pretty simple..
Hello,
El 09/03/2011 19:58, Kevin Watson escribió:
As I said in an earlier message, this is an experiment that I want to
run and would rather not touch mission and safety-critical GNC
components, like our navigation GPS receivers. Mass is not an issue.
So I understand that timing is not
If there are already other GPS units onboard,
also be careful of interference. On some of our
balloon work we have had COTS GPS receivers that
would jam each other if placed to closely together.
It'd be a shame if your $50 cheapie jammed the
space-rated unit and sank the whole mission.
Magnus,
Drop the receiver and antenna out of the equation and
just provide a timing signal on launch pad...
I need to keep computers time synchronized from launch through at least
arrival on orbit so that time-tagged network messages can be played back
with some degree of fidelity. For
Hi Tom, Kevin,
the JLT DROR GPSDO mentioned by Kevin in the original email may be
overkill for this application, as it is designed to provide very low phase
noise
under extreme vibration conditions, and it is state-of-the-art technology
and priced accordingly. It is designed to interface
On Wed, Mar 9, 2011 at 22:09, jimlux jim...@earthlink.net wrote:
OTOH, if you're building a rocket that's big enough to need something like
this, you can likely get the needed export licenses, or at least, comply
with the export control laws.
Wait, he _is_ exporting the whole rocket, anyway,
On Wed, Mar 9, 2011 at 5:43 PM, Sanjeev Gupta gha...@gmail.com wrote:
Can you claim a rocket launch as an Export Credit? Yes, Officer, we
will report to the Customs Department if this equipment re-enters US
Territory. We will keep track of it, thank you. And believe me, I
will know
On 3/9/11 5:43 PM, Sanjeev Gupta wrote:
On Wed, Mar 9, 2011 at 22:09, jimluxjim...@earthlink.net wrote:
OTOH, if you're building a rocket that's big enough to need something like
this, you can likely get the needed export licenses, or at least, comply
with the export control laws.
Wait, he
El 10/03/2011 02:43, Sanjeev Gupta escribió:
On Wed, Mar 9, 2011 at 22:09, jimluxjim...@earthlink.net wrote:
OTOH, if you're building a rocket that's big enough to need something like
this, you can likely get the needed export licenses, or at least, comply
with the export control laws.
Hi Jim,
As part of my research into keeping time on rockets and spacecraft, I joined
this list to see what I could learn from the masters. Of course I'm a
knuckle-head for not assuming that you'd be one of the resident masters
grin. Anyway, as my accuracy needs are modest (~10uS across many
On Tue, Mar 8, 2011 at 9:57 AM, Kevin Watson time-n...@enuuf.com wrote:
Hi Jim,
As part of my research into keeping time on rockets and spacecraft, I joined
this list to see what I could learn from the masters. Of course I'm a
knuckle-head for not assuming that you'd be one of the resident
-
From: ehydra ehy...@arcor.de
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday, March 08, 2011 3:02 PM
Subject: Re: [time-nuts] Spacecraft Timekeeping
There are is a list on a ballooner website with GPS devices working beyond
export rules.
- Henry
On 03/09/2011 06:08 AM, Kevin Watson wrote:
Hi All. Thanks for responding. There are quite a few GPS receivers that
will work outside of the usual commercial-grade GPS limitations, but I'm
not too sure I need such a receiver. As my application is to just
accuratly time-tag messages for a data
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