Over the last 40 years or so, the near Earth dust flux has been characterised by a combination of data from space-flight dust experiments, lunar rock microcraters, meteor observations, and more recently, retrieved space-flown surfaces. Many new datasets have been obtained since the publication in 1985 of the derived mean annual dust flux at 1 AU by Grün et al. . In particular, the expansive LDEF data that covers a large size regime in a consistent manner. However, the 'Grun flux' appears wholly consistent with the more recent data when applied with care within a geometric meteoroid model. Furthermore, the definition of the level of debris 'contamination' in low Earth orbit, has now been reasonably well identified.
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