Re: Private baby GPS
- From: Mark Borgerson <mborgerson@xxxxxxxxxxx>
- Date: Mon, 30 Oct 2006 20:33:08 -0800
In article <1162258612.938716.24110@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
giorgis.3erolas@xxxxxxxxx says...
If you are really intent on duplicating the GPS concept, where you
Martin Maurer wrote:
Hello,
Then I would like to have a box that would indicate it's position with
relative high accuracy
with respect to the transmitters.
perhaps a completely different idea: how about a camera high above, which
extracts motion / changes against background ?
Regards,
Martin
The setting is just an example. I simply would like to duplicate the
consept of a GPS but on land and over radius say ... 30m
have several transmitters at known locations and a receiver at
an unknown position you will have the following characteristics:
1. The distance from transmitters to receivers varies by only
a factor of 2 to 3 (a guess based on satellite orbits and
ground distances). That means that you will have to locate
your transmitters a few hundred meters outside the sensed area.
2. Timing of the pulses from the transmitters will need to
be pretty well regulated (1 nanosecond timing error ~= 1 foot
distance error). That means very good clocks or hard wiring
to the transmitters from a single source.
3. The receiving unit can figure out it's position, but that
is of no help unless you can either log the position or
transmit it to the interested party.
Mark Borgerson
.
- References:
- Private baby GPS
- From: Giorgis
- Re: Private baby GPS
- From: Martin Maurer
- Re: Private baby GPS
- From: Giorgis
- Private baby GPS
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