[amsat-bb] Bob Farquhar SK

[James R. La Frieda]

https://en.wikipedia.org/wiki/Robert_W._Farquhar

https://en.wikipedia.org/wiki/Halo_orbit


On 10/19/2015 1:58 PM, Peter Guelzow wrote:
> Robert W. Farquhar, PhD (1932-2015)
>
> It is with great sadness to inform you that Robert W. Farquhar, former
> flight director of the ISEE-3 mission passed away on Sept 18th, 2015.
>
> Bob’s dissertation was key to halo orbits around libration points, which
> are now used by many science missions. After redirecting the ISEE-3
> mission to comet Giacobini-Ziner in 1985 he developed the trajectory
> with eventually returned ISEE-3 to earth’s vicinity in 2014, where with
> his assistance an international team successfully regained control of
> the aging spacecraft.
>
> Our heart goes out to his family and friends and all those who were
> close to him.
>
> Peter Guelzow, DB2OS
> AMSAT-DL
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