[time-nuts] GPS tick all over the place. Suspect aurora effects

lists at lazygranch.com lists at lazygranch.com
Thu Jan 26 18:25:38 EST 2012


Is there something you could record to document this? Odd SNR on a bird?
 
-----Original Message-----
From: paul swed <paulswedb at gmail.com>
Sender: time-nuts-bounces at febo.com
Date: Thu, 26 Jan 2012 18:15:27 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] GPS tick all over the place. Suspect aurora effects

Yup just the first time I have seen the pps this crazy
But as we speak its settling down. So it was an effect for about an hour.
Regards
Paul.

On Thu, Jan 26, 2012 at 5:59 PM, Jim Lux <jimlux at earthlink.net> wrote:

> On 1/26/12 2:08 PM, paul swed wrote:
>
>> We are talking parts in the -9th but I am using a hp3801 and the general
>> software that lets you see the 1 sec variation.
>> I had never seen this behavior before and thought the oscillator must be
>> in
>> trouble. Measured it against a local RB and it was stable.
>> Then it hit me, could this actually be the effects of the aurora?
>> I am thinking it just might be.
>> Regards
>> Paul
>> _
>>
>
> google for "Space Weather Effects on GPS"
>
> there's a presentaton by Thomas Bogdan at the Space Weather Prediction
> Center that gives you some numbers to work with.
>
> 10s of meters effects aren't unusual.
>
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