This page shows trends of SIM shifts (dy and dz) and twist (dtheta). All quantities are directly taken from pcaf*_asol1.fits files. The units are mm for dy and dz, and second for dtheta. We fit three lines separated before (Days of Mission)= 1400 (May 21, 2003), between 1400 and 2700 (Dec 11, 2006), and after 2700. The unit of slopes are mm per day or second per day.
These sudden shifts were due to fid light drift
(see a memo by Aldocroft fiducial light drfit).
For dtheta, data are further devided into smaller groups according to which instrument was used (
ACIS-I, ACIS-S,
HRC-I, and HRC-S)
Followings are similar plots for each year
Plots for year: 1999
Plots for year: 2000
Plots for year: 2001
Plots for year: 2002
Plots for year: 2003
Plots for year: 2004
Plots for year: 2005
Plots for year: 2006
Plots for year: 2007
Plots for year: 2008
Plots for year: 2009
Followings are ASCII data tables for the data plotted above. The entires are time in seconds from
Jan 1, 1998, dy, dz, and dtheta. All entires are 5 min avaerage.
ASCII Data for year: 1999
ASCII Data for year: 2000
ASCII Data for year: 2001
ASCII Data for year: 2002
ASCII Data for year: 2003
ASCII Data for year: 2004
ASCII Data for year: 2005
ASCII Data for year: 2006
ASCII Data for year: 2007
ASCII Data for year: 2008
ASCII Data for year: 2009
From the same fits files, we also collected sim_x,y, and z postions, pitch amps, and yaw amps of dithers
Followings are ASCII data tables for the data plotted above. The entries are Fits file name,
tstart, tstop, sim_x, sim_y, sim_z, pitchamp, and yawamp.
ASCII Data for year: 1999
ASCII Data for year: 2000
ASCII Data for year: 2001
ASCII Data for year: 2002
ASCII Data for year: 2003
ASCII Data for year: 2004
ASCII Data for year: 2005
ASCII Data for year: 2006
ASCII Data for year: 2007
ASCII Data for year: 2008
ASCII Data for year: 2009