ASTEX LES data

Hello,

Can someone comment on the "stats" attribute?  The LES output produces profile data at three snapshots (8, 19, and 36).  It's not clear what "stats" is though.  The 3D output has dimensions of (3,3,120)  which translates to (stats,snapshot,height).  Similarly, the 2D time series also contains stats with dimensions (3,40) or (stats,time).  