That is something we'll all have to get use to. If it's above 30, just about no one is going to get it! But we need the impossible ones for scientific analysis reasons. Per Dr. Westphal: ""We want to measure the detection efficiency curve all the way down to zero. In previous phases, we were able to measure detection efficiency as a function of track size only down to about 2.5 microns in diameter,gebils wrote:http://stardustathome.ssl.berkeley.edu/ ... 6&theY=336
Absolutely nothing there - 53 point loss.
and even here dusters were amazingly good at finding tracks (better than 70%). We really want to know how small we can go and still find tracks, and that means going over the whole range of sizes, all the way down to (essentially) zero! We know that this can be frustrating, but the important thing is to do as well as you can, but don't expect to be able to get everything -- that is impossible! We can't find the smallest ones either."
Hope that clarifies why. But above all, don't get discouraged on those tracks. The HAT's are a different matter. See separate post on those (coming momentarily).
Dan