[ntp:questions] Google and leap seconds

David Woolley david at ex.djwhome.demon.invalid
Fri Sep 23 07:32:58 UTC 2011

Chris Albertson wrote:

> If you just start thinking of random orbits you will have the problem
> that something bad happens, like one a month all of then are on one
> side of the Earth or something dumb like that.    Quickly you find the
> orbits must be an integer fraction or multiple of the Earth's rotation
> period.  a factor of "1" is is very high and takes a lot of energy to

I suspect one reason for having them come back to the same place each 
day within a few minutes is that you tweak the orbits to optimised the 
constellation in a war zone and then not have to spend fuel maintaining the

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