- Original Message -
From: Andrea Baldoni erm1ea...@ermione.com
To: time-nuts@febo.com
Sent: Monday, January 12, 2015 2:59 AM
Subject: [time-nuts] GPS 1PPS ultimate accuracy
Hello all.
I am planning to do some experiments to evaluate the aging of oscillators
(this one of the reasons I'm
On Mon, Jan 12, 2015 at 06:16:01PM -0500, Bob Camp wrote:
Actually it’s a bit worse than you might expect.
The uncorrected sawtooth will give you about 20 ns of wander. At the one day
level, GPS without some sort of ionosphere help (like a dual frequency
receiver) will add another 10 ns or
On Mon, Jan 12, 2015 at 03:10:39PM +0100, Attila Kinali wrote:
The GNSS Timing AppNote for the LEA6-T receiver[1] will give you an idea
what jitter you get with GPS. Please be aware that these measurements
were done with an antenna located at a _good_ position (ontop of a 4 story
building
Hi
On Jan 15, 2015, at 4:56 AM, Andrea Baldoni erm1ea...@ermione.com wrote:
On Mon, Jan 12, 2015 at 06:16:01PM -0500, Bob Camp wrote:
Actually it’s a bit worse than you might expect.
The uncorrected sawtooth will give you about 20 ns of wander. At the one day
level, GPS without some sort
Hello all.
I am planning to do some experiments to evaluate the aging of oscillators
(this one of the reasons I'm willing to buy the Milleren without EFC).
What I would like to do exactly is to sample the total of a counter (of
suitable number of bits, taking in account the fact that it will
Hi
Actually it’s a bit worse than you might expect.
The uncorrected sawtooth will give you about 20 ns of wander. At the one day
level, GPS without some sort of ionosphere help (like a dual frequency
receiver) will add another 10 ns or so to that. Net, your pps is spread over a
30 ns range.
Ciao Andrea,
On Mon, 12 Jan 2015 11:59:26 +0100
Andrea Baldoni erm1ea...@ermione.com wrote:
The sampling interval could come from a (long time based on a) sawtooth
uncorrected PPS from a cheap GPS, a sawtooth corrected from a good one
(perhaps
the Lucent GPSDO), or a computer using NTP.
