[amsat-bb] Re: Earths Magnetic Field strength

Tony Langdon vk3jed at gmail.com
Wed Feb 21 12:12:15 PST 2007

At 03:00 AM 2/22/2007, lu7abf wrote:
>If the separation between poles of a small magnet defines strength 
>of force, then a small separation as in a magnetic compass needle 
>only 1 inch long placed at equator, over 6000 miles from poles will 
>not move. Instead it does.

But that is rotation, which is equivalent to magnetotorquing, and we 
all agree this works well.  However, your compass for a rare earth 
speaker magnet doesn't actually move across the table top in Earth's 
magnetic field, does it?  THAT would be equivalent to trying to move 
the satellite into a new orbit.

73 de VK3JED

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