[TML] Jump variation

[Kirk Bailey]

shadow at shadowgard.com wrote:
> On 5 Sep 2007 at 3:08, Jerry W Barrington wrote:
> 
>> I would say at least 4 sensors, well separated, combining signal strength &
>> timing with their own positions.  Hmm.  If the events are rare enough, they
>> could be omni-directional and still give you accurate fixes.
>>
>> The reason I say 4 instead of 3 like Greg is their is always the possibility
>> of up or down entry.  3 sensors can only fix to a point in their mutual
>> plane, with height above or below that plane unknown.  4 sensors not in the
>> same plane fixes that.
> 
> 3 sensors not on the same line can generate a "point" for a source in 
> their plane. And a "line" for a source not in their plane. 
> 
3 sensors are ALWAYS on a plane. Think about it. Minimum to 'not be on a 
plane' is 4. 3 can not be on a line, but will be on a plane, always.
> That not in the same line is important. 
> 
> And in the real world, you have to worry about blind spots for each 
> sensor cause by various bodies. So you'll actually need more than 4.
> 
> --
> Leonard Erickson (aka shadow)
> shadow at shadowgard dot com
> 
> 
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-- 
Salute!
	-Kirk Bailey
           Think
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