Re: Pulsar Nav accuracy

--- Hal <hal@buffnet.net> wrote:
....
> Also, how accurate does one's position have to be
> known to establish where you are precisely?  In
other >words, if I for what ever reason, jump to some 
> unknown location in space, and I find at least 2
> known pulsars - wouldn't that establish the rough
ball >park of where I was to the extent that I at
least know >which direction to jump bACK.

Hal,
      A roundabout and overly simplistic answer is;
1 point establishes a sphere that you are on the 
surface of, I presume the radius can be determined.
2 points establish a line, and therefor you are on the

'surface' of a circle defined by the intersection of 
the two angles to the two ends of the line.
3 points determine a plain, and only two locations
can satisify the requirements for the required angles
to the determined locations. (I.E. plus or minus
angles)
4 points are needed to determine the plain and
determine
if you are above or below the level of the plain.
5+ points are better.

Bye for now,
John L.

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