However, determining the basic properties of a single radar meteor
with high accuracy, such as its direction, brightness, and speed, is difficult, if not impossible.
Although radar is one potentially powerful tool for this work, radar meteor
data are more difficult to interpret than visual data.
Typically this takes about 1,500 years for the 0.1-gram meteoroids responsible for run-of-the-mill visual meteors, and about 500 years for the 0.001-gram particles responsible for most radar meteors