Update on S2 data quality segment repository
- August 1, 2003
Version 2 segments released June 19
Issues & improvements reported at July 3 telecon:
-
Gaby's segment-indexed minute-trend plots reorganized (including
histograms) and now cover L1
and H1
-
Gaby is making lists of large AS_Q outliers for followup
investigations and for setting cuts on end-of-lock period
-
Doug Lormand discovered we had no working
magnetometers at the LLO end stations during S2 (see note
from Doug)
New Issues & Improvements since July 3 telecon to be
included in the Version 3 release:
-
John has nearly completed a tabulation of periods with unacceptably
high band-limited powers (see note from
John)
-
Gaby has completed a study of H1 AS_Q outliers and proposes
thresholds for vetoing data (see note
from Gaby)
-
Peter has created segment
manipulation utilities and posted to LIGOtools
(segwizard is especially useful)
-
Peter has tabulated a handful of missing 16-second RDS frame
files (prompted by query from Bruce Allen about missing data)
-
Veto of L1 data associated with bad GPS timing in end station
(see Brian's note)
-
Flagging of data for which no calibration drift corrections
are presently available (see
tables in PatrickS's SenseMon page)
-
Byte-swapping error in certain H1 channels (IOO PSL, SUS
coil readbacks, PEM) (see Daniel's note)
Additional goals/hopes for Version 3 release:
-
Cuts on calibration reliability (based on allowed range of
alpha - default suggestion from PatrickS: [0.25 to 2.0])
-
Violin mode ringdowns at starts of segments, any known mid-segment
excitations
-
AS_Q outliers in L1 and H2
More input welcome! (from other
S2 investigations or astrophysical search groups)