An excellent introduction to the need for ASSA asteroid observations was given by Henry Throop at Scopex 2014.

Henry’s talk at ScopeX 2014 : “Observations of Near-Earth Asteroids and the Impact Hazard to Earth” by Dr Henry Throop, Univ of Pretoria &PSI, Tucson” can be downloaded from the ScopeX website, specifically under Videos tab http://scopex.co.za/videos.html

To view Henry’s follow-up slides as a pdf file – click here ScopeX Asteroids Followup Throop Oct14