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[aprssig] Proximity detection

Andrew Rich vk4tec at people.net.au
Wed Aug 22 13:49:35 UTC 2007


If you get a micro, and you know from a GPS where you are, and then you pick
up another position, one would assume you can then apply a basic "is there
anyone in my box" calculation ?

For example

I am at

2734.44 15206.20 and another object is at
2734.45 15206.20 - does not match - outside the box

2734.44 15206.20 and another object is at
2734.44 15206.20 - match - inside the box

I spose the size of the area depends on how many significant digits of the
position you use ?

You could make it tighter by comparing more digits, and wider if you compare
less ?

Comments ?

Andrew Rich VK4TEC
vk4tec at people.net.au

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4:02 PM
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