[LMB] OT: Orbital Mechanics (WAS: Reading - what turns you off?)

James Nicoll jdnicoll at panix.com
Mon Jan 26 14:09:27 GMT 2009

On Mon, 26 Jan 2009, alayne at twobikes.ottawa.on.ca wrote:

> On Tue, 20 Jan 2009, James M. BRYANT G4CLF wrote:
>> Mitch Miller enquires:-
>> >So what do you do if you want to have
>> >a satellite constantly over the pole?
>> A lot of work.
>> You'll need antigravity or a reactionless
>> space drive - rockets won't do it for
>> very long at all at all..
> It's not nearly that complicated, as long as your definition of "over the
> pole" includes any part of the high arctic, and constantly means "within
> an hour or two".
> Look at how Canada aligned the elliptcal orbits of Radarasat and Radarsat 2
> to ensure that all parts of Canada's Arctic were covered every few hours
> (I think it was every 6 hours, but I'm woking from memory).

You can also use Robert Forward's idea of having a device use light 
pressure from the sun to remain in place wrt the poles, something he 
called a statite.

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