I've got a raw wideband GPS capture, dual frequency L1/L2, on this
page about my GPS/GNSS front-end board project:
http://pmonta.com/blog/2012/06/04/gnss-firehose/
I plan to do a new spin of this board with some minor improvements as
soon as I have the time. (For those who want to build the
and frequency measurement
Subject: Re: [time-nuts] Raw GPS signal samples
I've got a raw wideband GPS capture, dual frequency L1/L2, on this page about
my GPS/GNSS front-end board project:
http://pmonta.com/blog/2012/06/04/gnss-firehose/
I plan to do a new spin of this board with some minor
...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Collins, Graham
Sent: Friday, 6 September 2013 10:10 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Raw GPS signal samples
I stumbled across a web site which provides details on the use of GPS
On 9/2/13 7:21 PM, John Seamons wrote:
Somewhat off-topic but it might help someone out: I've had a tough time finding, and
using, files on the net containing raw GPS signal samples to be used with the various
software-only (or software-mostly) GPS receivers out there. I finally got a file of
Hi John,
It's not off-topic at all. Thanks for posting. Someday it would be cool if an
amateur precise time project emerged from this effort.
What is not clear from your link is the accuracy or stability of the LO that
was used. It seems to me, for timing purposes, that one would want to have
Tom, John,
Wouldn't the software be able to remove any LO instability by simple cross
correlation error cancellation by all the carrier phases? After all carrier
phase measurements are concerned with relative phase delays, not absolute
offsets?
In other words the LO and ADC phase errors
For our timing niche, SDGPS (Software-Defined GPS) doesn't even need to be
real-time. It's the after-the-fact corrections to the LO that are of interest.
Can you elaborate the after-the-fact corrections to the LO point? I
understand that: I can correct the LO after a sample cycle, then use
the
On 09/04/2013 11:25 PM, Said Jackson wrote:
Tom, John,
Wouldn't the software be able to remove any LO instability by simple cross
correlation error cancellation by all the carrier phases? After all carrier
phase measurements are concerned with relative phase delays, not absolute
offsets?
Tom,
On 09/04/2013 11:05 PM, Tom Van Baak wrote:
Hi John,
It's not off-topic at all. Thanks for posting. Someday it would be cool if an
amateur precise time project emerged from this effort.
What is not clear from your link is the accuracy or stability of the LO that
was used. It seems
On Sep 5, 2013, at 9:05 AM, Tom Van Baak wrote:
Hi John,
It's not off-topic at all. Thanks for posting. Someday it would be cool if an
amateur precise time project emerged from this effort.
What is not clear from your link is the accuracy or stability of the LO that
was used. It seems
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