Hi
If there are no receivers using the service (WAAS as a full GPS sat), it's
either because:
1) Nobody knows about it
2) It does not work
Either way why spend the money to keep it running much better than needed for
WAAS simply for it to be there unused?
Bob
On Jul 10, 2013, at 8:14 PM,
Hi
I read the patent and understand how you can get timing off of a WAAS sat. The
carrier does not need to have fancy steering on it to enable that function. The
thing that it does not show is doing carrier phase off of a WAAS sat.
Bob
On Jul 10, 2013, at 9:54 PM, David I. Emery
Hi
The pseudo random spreading / looks like noise / buried signal thing is the
most common way people piggyback low level signals on a bent pipe.
Bob
On Jul 11, 2013, at 12:00 AM, David I. Emery d...@dieconsulting.com wrote:
On Wed, Jul 10, 2013 at 07:40:50PM -0400, David I. Emery wrote:
Hi Bob,
On 07/11/2013 12:32 PM, Bob Camp wrote:
Hi
If there are no receivers using the service (WAAS as a full GPS sat), it's
either because:
1) Nobody knows about it
2) It does not work
Either way why spend the money to keep it running much better than needed for
WAAS simply for it to be
On 7/11/13 3:36 AM, Bob Camp wrote:
Hi
The pseudo random spreading / looks like noise / buried signal thing is the
most common way people piggyback low level signals on a bent pipe.
Assuming that the bent pipe isn't running saturated, which I'm not sure
is a valid assumption. Running TWTAs
, July 11, 2013 10:56 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
On 7/11/13 3:36 AM, Bob Camp wrote:
Hi
The pseudo random spreading / looks like noise / buried signal thing is
the most common way people piggyback low level signals on a bent pipe.
Assuming
that produces pseudo range for WAAS (as opposed
to EGNOS).
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Magnus Danielson
Sent: Thursday, July 11, 2013 9:25 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops
Hi
From the US patent:
... and possibility of extending the operating range by allowing increased
separation of reference and base receivers by incorporating ionospheric
models provided by WAAS
To me that says - position data from WAAS, carrier from GPS.
===
I had
On 10 Jul, 2013, at 14:08 , David I. Emery d...@dieconsulting.com wrote:
It seems completely inconceivable to me that either the antenna
system (particularly feeds) or transponder RF hardware on any commercial
Ku or C or Ka or X band satellite could possibly be frequency agile
enough to tune
Taylor
Sent: Thursday, July 11, 2013 12:57 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
Hi
From the US patent:
... and possibility of extending the operating range by allowing increased
separation of reference and base
If you look at the pictures here
http://www.orbital.com/NewsInfo/Publications/Galaxy_Fact.pdf
the satellite on the right has things sticking out the bottom, in the
back corner, that are missing on the others and that look a lot like
the antennas on GPS satellites. The WAAS satellite is also
Hi
It could be 10 pounds of stuff and 340 pounds of shielding …
It also could be 10 pounds of WAAS and 340 pounds of something they don't want
to talk about.
Bob
On Jul 11, 2013, at 3:17 PM, David J Taylor david-tay...@blueyonder.co.uk
wrote:
If you look at the pictures here
On 07/09/2013 04:25 AM, Joseph Gwinn wrote:
Yes, of course, but I don't think I explained very well. The issue was
more economic than technical.
There isn't much spare space, weight, or power in the birds, technology
moves rapidly, and the satellite companies don't want to have expensive
On Wed, Jul 10, 2013 at 08:10:45PM +0200, Magnus Danielson wrote:
On 07/09/2013 04:25 AM, Joseph Gwinn wrote:
Yes, of course, but I don't think I explained very well. The issue was
more economic than technical.
There isn't much spare space, weight, or power in the birds, technology
moves
On 07/10/2013 11:08 PM, David I. Emery wrote:
On Wed, Jul 10, 2013 at 08:10:45PM +0200, Magnus Danielson wrote:
On 07/09/2013 04:25 AM, Joseph Gwinn wrote:
Yes, of course, but I don't think I explained very well. The issue was
more economic than technical.
There isn't much spare space,
David,
While I can easily see how you can do closed loop correctioin for Dopplar
from the transmission point for a 'bent pipe' repeater, at any other
location that correction would not be valid, because the paths are not
parallel.
-John
=
On Wed, Jul 10, 2013 at 08:10:45PM +0200,
Hi
On Jul 10, 2013, at 5:08 PM, David I. Emery d...@dieconsulting.com wrote:
On Wed, Jul 10, 2013 at 08:10:45PM +0200, Magnus Danielson wrote:
On 07/09/2013 04:25 AM, Joseph Gwinn wrote:
Yes, of course, but I don't think I explained very well. The issue was
more economic than technical.
On Wed, Jul 10, 2013 at 02:42:19PM -0700, J. Forster wrote:
David,
While I can easily see how you can do closed loop correctioin for Dopplar
from the transmission point for a 'bent pipe' repeater, at any other
location that correction would not be valid, because the paths are not
parallel.
Hi
If the WAAS birds are run in a fashion that gives a true GPS payload
performance, why not assign them a SN 32 or below and use them?
If the WAAS birds are not in the right numbers, why bother to set them up and
spend the bucks to make them behave like a nav sat? What's the payoff?
Bob
On 07/11/2013 01:45 AM, Bob Camp wrote:
Hi
If the WAAS birds are run in a fashion that gives a true GPS payload
performance, why not assign them a SN 32 or below and use them?
If the WAAS birds are not in the right numbers, why bother to set them up and
spend the bucks to make them behave
On Wed, Jul 10, 2013 at 07:45:39PM -0400, Bob Camp wrote:
Hi
If the WAAS birds are run in a fashion that gives a true GPS payload
performance, why not assign them a SN 32 or below and use them?
If the WAAS birds are not in the right numbers, why bother to set them up
and spend the
On Wed, Jul 10, 2013 at 07:40:50PM -0400, David I. Emery wrote:
But if the satellite radiates what a local GPS package would and
transmits ephmerides defining its position and motion it could be
included in a GPS solution and could be used for timing and frequency
purposes the same as
Re: time-nuts Digest, Vol 108, Issue 36
On Sat, 06 Jul 2013 13:59:26 -0400, time-nuts-requ...@febo.com wrote:
Message: 5
Date: Sat, 06 Jul 2013 18:57:05 +0200
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS
Jim, you are patialy correct but 99% only talk, never build any thing
Bert Kehren
Sent from Samsung tabletJim Lux jim...@earthlink.net wrote:On 7/6/13 7:23 PM,
Bob Camp wrote:
Hi
Ok, lets *assume* there is some uber secret gizmo in the sat that makes the
unsupervised signal absolutely
Hi everyone,
Have not seen a reference to either the Fenton patent nor the Fruehof
paper, which discuss using WAAS for timing with a dish antenna.
http://www.freqelec.com/gps_gnss/waas_for_telecom_wp_5-06.pdf
https://www.google.com/patents/US6445340
kind regards,
Björn
version.
John WA4WDL
--
From: Magnus Danielson mag...@rubidium.dyndns.org
Sent: Saturday, July 06, 2013 12:57 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
On 07/06/2013 06:29 PM, Joseph Gwinn wrote:
Code
Re: time-nuts Digest, Vol 108, Issue 29
On Fri, 05 Jul 2013 19:55:42 -0400, time-nuts-requ...@febo.com wrote:
Message: 6
Date: Sat, 06 Jul 2013 00:27:33 +0200
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops
@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
Re: time-nuts Digest, Vol 108, Issue 29
On Fri, 05 Jul 2013 19:55:42 -0400, time-nuts-requ...@febo.com wrote:
Message: 6
Date: Sat, 06 Jul 2013 00:27:33 +0200
From: Magnus Danielson mag...@rubidium.dyndns.org
To: time-nuts@febo.com
On 7/6/13 8:10 AM, jmfranke wrote:
http://www.navipedia.net/index.php/WAAS_Signal_Structure
Doppler Shift: The Doppler shift, as perceived by a stationary user, on
the signal broadcast by WAAS GEOs is less than 40 meters per second
(?210 Hz at L1) in the worst case (at the end of life of the
On 7/6/13 7:50 AM, Joseph Gwinn wrote:
Re: time-nuts Digest, Vol 108, Issue 29
On Fri, 05 Jul 2013 19:55:42 -0400, time-nuts-requ...@febo.com wrote:
OK. Given that the birds WAAS uses were built for communications
purposes, not timing purposes, I'g guess that their frequency reference
is a
Re: time-nuts Digest, Vol 108, Issue 35
On Sat, 06 Jul 2013 12:00:01 -0400, time-nuts-requ...@febo.com wrote:
Message: 5
Date: Sat, 06 Jul 2013 08:56:46 -0700
From: Jim Lux jim...@earthlink.net
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
Message-ID
On 07/06/2013 06:29 PM, Joseph Gwinn wrote:
Code/Carrier Frequency Coherence: The lack of coherence between the
broadcast carrier phase and the code phase shall be limited. The short
term (10sec) fractional frequency difference between the code phase
rate and the carrier frequency shall be less
...@rubidium.dyndns.org
Sent: Saturday, July 06, 2013 12:57 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
On 07/06/2013 06:29 PM, Joseph Gwinn wrote:
Code/Carrier Frequency Coherence: The lack of coherence between the
broadcast carrier phase and the code phase shall be limited
--
From: jmfranke jmfra...@cox.net
Sent: Saturday, July 06, 2013 2:09 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
A lot of the changes from bent pipe to the new system including C-band
uplink is explained
...@rubidium.dyndns.org
Sent: Saturday, July 06, 2013 12:57 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
On 07/06/2013 06:29 PM, Joseph Gwinn wrote:
Code/Carrier Frequency Coherence: The lack of coherence between the
broadcast carrier phase and the code phase shall be limited
Sorry about the duplicates, email issue.
John WA4WDL
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
On 7/6/13 9:29 AM, Joseph Gwinn wrote:
Code/Carrier Frequency Coherence: The lack of coherence between the
broadcast carrier phase and the code phase shall be limited. The short
term (10sec) fractional frequency difference between the code phase
rate and the carrier frequency shall be less than
--
From: Magnus Danielson mag...@rubidium.dyndns.org
Sent: Saturday, July 06, 2013 12:57 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)
On 07/06/2013 06:29 PM, Joseph Gwinn wrote:
Code/Carrier Frequency
On 7/6/13 7:23 PM, Bob Camp wrote:
Hi
Ok, lets *assume* there is some uber secret gizmo in the sat that makes the
unsupervised signal absolutely perfect when transmitted from the sat.
The sat still moves relative to the ground. It's speed is a vector in three
dimensions (up / down , north /
39 matches
Mail list logo
