http://www.kids-und-co.de/spaceclub/loecher.htm (BrokenLink 2004-09-23)
(Archived at http://web.archive.org/web/20040212145516/http://www.kids-und-co.de/spaceclub/loecher.htm.)
I found the article very informative. I just don't think I'm the right one to translate it.
If you want to know what it is (auf Englisch), try http://casa.colorado.edu/~ajsh/hawk.html