[amsat-bb] Re: XW-1 == YAOGAN 8 ?

Nigel Gunn G8IFF/W8IFF nigel at ngunn.net
Wed Dec 16 11:58:23 PST 2009

I don't know but something is causing the two satellites to drift apart.
Knowing the rules helps to sort out the keplerian elements of the two.

Alexandru Csete wrote:
> The influence of the drag force also depends on the mass since F=m*a,
> so the same drag force will cause less deceleration on a heavier
> satellite. You have to put this together with F=pressure*surface_area
> to take both the size and the mass of the satellite into account.
> By the way, is there any significant atmospheric drag at 1200 km
> altitude?
> 73
> Alex OZ9AEC

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