[time-nuts] nuts about position (cheap receiver)

Bob kb8tq kb8tq at n1k.org
Thu May 3 17:32:09 EDT 2018


Hi

…… and the quoted errors are in the 10’s of cm range. Thus you need a few years,
even if you are moving an inch per year. 

Bob

> On May 3, 2018, at 2:19 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
> 
> 
> kb8tq at n1k.org said:
>> If you have a very good survey grade receiver and take a long enough data
>> set, yes you can  watch your location drift in some parts of the world. In
>> most locations, fixes a few years apart would be a better bet. 
> 
> I'm in Silicon Valley.  The San Andreas fault is a few miles from here.  A 
> map of the bay area will show a dozen major faults.  A neighborhood map may 
> have several smaller lines.
>  https://earthquake.usgs.gov/earthquakes/events/1906calif/virtualtour/bayarea
> .php
> 
> The USGS has good GPS receivers sprinkled around the area.  You can see 
> occasional
> antenna domes on a post alongside the highway.
>  http://www.quake.geo.berkeley.edu/usgs-gps/
> (Time sink warning.)
> 
> The fault moves about as fast as your fingernails grow, an inch per year.  
> That's one side relative to the other.  I don't know how fast the pair is 
> moving.
> 
> 
> 
> -- 
> These are my opinions.  I hate spam.
> 
> 
> 
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