J. Kissel

In light of the recent problems with VEA temperature causing sag in the L1 QUADs -- to the point of rubbing earthquake stops (see LLO aLOG 12633) -- I've gathered a similar 1-year long collection of hour trends of each VEA's temperature vs. vertical displacement of each QUAD. Our temperature appears to be rock solid (certainly within 1 [deg C], and at the end stations, better than +/- 0.2 [deg C]). After installation, the vertical position of QUADs also remains pretty darn stationary, staying within a few 10s of [um] (a more precise assessment would require a better tool than dataviewer).