L4, L5 Gravity Wells

<them with radar ?

There is one practical problem with that approach which will make the
collected tracking data rather difficult to analyze....>>

I know very little about astronautics so I don't mind revealing my
igonrance -- I'm a theoretical neuroscientist and I deal a lot with chaotic
dynamics. I don't know very much about orbital mechanics or the dynamics
associated with them but I'll take a guess that the small amount of momentum
imparted by the "tossing" process would swamp any effect due to
gravitational gradient at that distance, and the trajectory which was
followed by each piece of chaff would be determined far more by the
variations in initial momentum than by gravitational gradient.

Ok I did say I was only guessing. It's back to you serious guys now.

Kathryn