[time-nuts] question about Thunderbolt geo acuracy

[David]

Not being able to receive signals from GPS satellites anywhere below
the horizon is an even larger problem for vertical accuracy.

On Thu, 10 May 2012 13:59:51 +0100, "Rob Kimberley"
<robkimberley at btinternet.com> wrote:

>How accurate do you need your height? 
>
>Remember that height is the least accurate of GPS parameters due to the fact
>that you rarely have a GPS satellite directly overhead.
>
>Rob Kimberley
>
>-----Original Message-----
>From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>Behalf Of swingbyte
>Sent: 10 May 2012 13:50
>To: Discussion of precise time and frequency measurement
>Subject: [time-nuts] question about Thunderbolt geo acuracy
>
>Hi all,
>Hope this isn't too chat roomy, however, I have need of a survey precise
>geolocation type gps.  I was wondering if the precise timing abilities
>extend to its precision in position output?  I have a thunderbolt and one of
>those conical white aerials from china and would like to know if this
>combination will give me accurate height data.
>
>Tim