> >2. The lack of correlation between 1 and 0.3 micron dust implies that >our shut downs appear to be completely ineffective at avoiding small >dust particles. However, I do not advocate shutting down based on >counts for 0.3 micron particles, not knowing which particles settle >down most and are most damaging. But this does illustrate that we may >not know what we are doing. > The .3 micron counts are ignored by the staff. A memo from walt siegmund received last year stated that the offending particle size regarding scattered light is 5 micron and above. It was at this time we modified the particle counter to report the 1 micron and larger particle counts (the counter does not have a 5 micron threshold) Mark Klaene APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 182 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO