Date: July 31st, 2002

Attendees: Sany Yoshida, Raghu, Stephanie (LLO), Luca, Virginio (LHO), Matt, Erika, Hiro, Biplab (Caltech)

We discussed about measurement of angular motion of mirrors. First, Virginio explained measurements of transfer functions from Ground noise to stack and mirrors done by Fred Raab in April-May. Sany Yoshida gave a talk on "Can't we monitor HAM table motion by OSEM sensors?" and presented the work on this by him and his students at LLO.

Sany's viewgraphs ,

Virginio's viewgraphs on Fred's elog entries ,

Fred's email,

(The following files are also contained in Virginio's viewgraphs)

Fred's Elog entry Apr26'02: Spectrum of LVEA Seismometers & Stack position ,

Fred's Elog entry May03'02: TF (stack pos/seis) ,

Betsy's entry May03'02:

TF (stack pos/seis) & coherence (LVEA Seis -> ITMX) ,

TF (stack pos/seis) & coherence (LVEA Seis -> ITMY) ,

TF (stack pos/seis) & coherence (EX Seis -> ETMX) ,

TF (stack pos/seis) & coherence (EY Seis -> ETMY)

Any comments? write to bbhawal@ligo.caltech.edu