25 microns RMS
from 1997 measurements without any hardware installed on the dish.
16 microns RMS
in Sept 2002 - DSOS not activated.I credit good RMS to DSOS standoff assemblies installed on the back
of the dish with liquid heat exchangers circulating fluid and insulated from
the ambient environment.
13.4 microns
RMS in August 2003 - more calibrated and activated toothpick assemblies.