Re: [time-nuts] Link for T Mon

Thanks for all the replies off and on list. I did find Timekeeper for the Thunderbolt. It syncs up your PC time using the T-Bolt. No one seemed to know about that. I have it if any one is interested. Also found something called "TR Configurator" in the same folder with all the T-Bolt stuff.

Re: [time-nuts] Using GPS for space-based instrument

[EMAIL PROTECTED] skrev: > Hi Karl, > > commercial receivers are limited to 1000 knots by regulation. > > Considering that your space based vehicle will probably zomm about pretty > quickly (not geo-stationary) it sounds like you need a special "unlocked" > receiver, or a P-code military on

Re: [time-nuts] Using GPS for space-based instrument

On Mon, Nov 10, 2008 at 5:27 PM, Strauss, Karl F <[EMAIL PROTECTED]> wrote: > I've been tasked (or was it I was volunteered?) to do some basic design & > definition work on an ultra-stable master frequency system for a proposed > instrument that is currently planned to be in an Earth-trailing orb

Re: [time-nuts] Using GPS for space-based instrument

I'd suggest giving the GPS folks at JPL a call. They've probably looked into all the issues you're interested in, and can make suitable suggestions where to go for answers (subject to the usual export control restrictions).Jim Zumberge is the Section Manager of the Tracking Systems and Applicat

Re: [time-nuts] Using GPS for space-based instrument

Strauss, Karl F wrote: > I've been tasked (or was it I was volunteered?) to do some basic design & > definition work on an ultra-stable master frequency system for a proposed > instrument that is currently planned to be in an Earth-trailing orbit. > Given the first order accuracy requirement o

Re: [time-nuts] Using GPS for space-based instrument

Hi Karl: Tom Clark may be the person who can answer that question. I seem to remember that the very first GPS satellites had antennas only aimed at the Earth, but because many satellites now use GPS for a number of functions they also radiate some signal away from the Earth. In addition there'

Re: [time-nuts] Using GPS for space-based instrument

Hi Karl, commercial receivers are limited to 1000 knots by regulation. Considering that your space based vehicle will probably zomm about pretty quickly (not geo-stationary) it sounds like you need a special "unlocked" receiver, or a P-code military one. bye, Said In a message dated 1

Re: [time-nuts] Using GPS for space-based instrument

> I've been tasked (or was it I was volunteered?) to do some basic > design & definition work on an ultra-stable master frequency system > for a proposed instrument that is currently planned to be in an > Earth-trailing orbit. How far from Earth is "Earth-trailing"? This might help: http://www

[time-nuts] Using GPS for space-based instrument

I've been tasked (or was it I was volunteered?) to do some basic design & definition work on an ultra-stable master frequency system for a proposed instrument that is currently planned to be in an Earth-trailing orbit. Given the first order accuracy requirement of 1 part in 1E-10, my first tho

Re: [time-nuts] Link for T Mon

As well as Tboltmon, I found that DSPMon v1.53 also works (which is the current software for the Thunderbolt E). http://www.trimble.com/timing/thunderbolt-e.aspx?dtID=support There is also a program called TrimbleMon_V1-05-0, which is the software mentioned in the Thunderbolt E manual, but whic

Re: [time-nuts] Checking accuracy of Rubidium standards

Bruce Griffiths wrote: > Bill Hawkins wrote: > >> -Original Message- >> From: Bruce Griffiths >> Sent: Sunday, November 09, 2008 10:00 PM >> >> ---%< >> Thus >> VAR(1) = (VAR(1,2) + VAR(1,3) - VAR(2,3))/2 >> VAR(2) = (VAR(1,2) + VAR(2,3) - VAR(1,3))/2 >> VAR(3) = (VAR(1,3) +