[time-nuts] Need advice for multilateration setup

Peter Reilley peter at reilley.com
Sat Mar 28 08:25:02 EDT 2015

Some crystal oscillators specify their sensitivity to G forces.
Here is one:

Available here:

Others specify shock and vibration limits but say nothing about 
frequency stability.


-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Chris
Sent: Friday, March 27, 2015 9:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Need advice for multilateration setup

On Fri, Mar 27, 2015 at 10:29 AM, Chuck Harris <cfharris at erols.com> wrote:

> The biggest problem I see is the crystal oscillator in the rocket is 
> going to notice the G forces during acceleration in a pretty big way.

But all of the ground stations will see the same frequency shift on the
rocket's transmitter.   I think this can be backed out in processing.

Someone needs to write the equations and post them here.

Chris Albertson
Redondo Beach, California
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