WB6BNQ skrev:
> GEEZ,
>
> After all this discussion, it sounds like he should consider 2 Cs space
> devices,
> one main and a secondary.
Actually, I would pick rubidium sources unless extreme stability and
offset is needed. The longer lifetime and less weight compared to Cs
devices would be a
Poul-Henning Kamp skrev:
> In message <[EMAIL PROTECTED]>, Magnus Danielson writes:
>
>> Once doppler bin and phase has been achieved for each PRN, [...]
>
> Just a footnote to say that as soon as you start receiving ephemerides
> from the first sat, the search-space can be significantly reduced
GEEZ,
After all this discussion, it sounds like he should consider 2 Cs space devices,
one main and a secondary.
BillWB6BNQ
Poul-Henning Kamp wrote:
> In message <[EMAIL PROTECTED]>, Magnus Danielson writes:
>
> > Once doppler bin and phase has been achieved for each PRN, [...]
>
> Just a
In message <[EMAIL PROTECTED]>, Magnus Danielson writes:
> Once doppler bin and phase has been achieved for each PRN, [...]
Just a footnote to say that as soon as you start receiving ephemerides
from the first sat, the search-space can be significantly reduced
if you care to do the, rather longha
Björn Gabrielsson skrev:
> On Tue, 2008-11-11 at 10:28 -0800, Lux, James P wrote:
>> A GPS receiver actually solves for the state vector of the receiver
>> (including the local clock error) using the raw observables from the
>> tracking loop (code phase). The nav equations calculate (apparent) r
Hi Bruce:
It's my understanding that if you look at the signal from a common GPS antenna
and feed it into a spectrum analyzer you will not see the signal. My guess is
that when developed by the military it was designed to be a stealth system.
GPS is what's called a Spread spectrum signal.
Als
On Tue, 2008-11-11 at 10:28 -0800, Lux, James P wrote:
>
> A GPS receiver actually solves for the state vector of the receiver
> (including the local clock error) using the raw observables from the tracking
> loop (code phase). The nav equations calculate (apparent) range and range
> rate fro
On Tue, 2008-11-11 at 10:10 -0800, Hal Murray wrote:
> > All the satellites are at the same frequency, and they are CDMA (each
> > satellite has a different PN sequence on its signal)
>
> What's the bandwidth of an individual satellite?
As said before. The carrier is chopped by a 1.023MHz PRN s
Hi Hal,
> What's the bandwidth of an individual satellite?
the bandwidth is defined by the ~ 1 MHz "chipping" rate that
phase-modulates the carrier, so it's roughly 1 MHz to both sides of the
carrier (for the civilian signal). Search google images for "gps
spectrum" to see plots... :-)
Chri
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Hal Murray
> Sent: Tuesday, November 11, 2008 10:10 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Checking the Frequency of a Rubidium
> Oscillator
>
>
> > All
> All the satellites are at the same frequency, and they are CDMA (each
> satellite has a different PN sequence on its signal)
What's the bandwidth of an individual satellite?
It may have been a different thread, but the Doppler shift is up to 2 KHz.
Even if you could tune to an individual sa
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
> Sent: Tuesday, November 11, 2008 9:28 AM
> To: time-nuts@febo.com
> Subject: [time-nuts] Checking the Frequency of a Rubidium Oscillator
>
>
> I have an EIP Model 548 counter with a
I have an EIP Model 548 counter with a YIG-tuned front end that can be
programmed to scan over narrow frequency ranges. By feeding the rubidium
oscillator under test into the 10 MHz clock input of the counter, is there any
reasonably simple way to directly measure the frequency of a GPS s
I have this and other Trimble software and documentation on my web site:
http://www.ko4bb.com/cgi-bin/manuals.pl
Search for Trimble
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
> Sent: Sunday, November 09, 2008 8:
On 11/11/08 2:55 AM, "Brian Kirby" <[EMAIL PROTECTED]> wrote:
> Somewhere out there is the specs that GPS was designed to. It list some
> of what they had to do, to make the rubidiums and cesiums work in the
> environment they put them in. Believe they are called ICD-GPS-200 or
> something li
I have just received a Trimble NTPX26AB-06, to add to the TBolt which performs
perfectly. I am aware that some exchanges have taken place in the past with
reference to this unit which it would seem was a Trimble design to offer a less
expensive alternative to the HP- Z3801A.
The obvious differen
Somewhere out there is the specs that GPS was designed to. It list some
of what they had to do, to make the rubidiums and cesiums work in the
environment they put them in. Believe they are called ICD-GPS-200 or
something like that
Marco IK1ODO -2 wrote:
> At 09.37 11/11/2008, you wrote:
>> Bo
At 09.37 11/11/2008, you wrote:
>Both Symmetricom and Frequency Electronics provide specialist space
>qualified products. It's not just a case of ruggedisation, but radiation
>hardening, g sensitivity which need to be designed in.
>
>Rob Kimberley
Also, space qualified GPS must handle the larger d
Both Symmetricom and Frequency Electronics provide specialist space
qualified products. It's not just a case of ruggedisation, but radiation
hardening, g sensitivity which need to be designed in.
Rob Kimberley
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf
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