Mitigation of angle tracking errors due to color dependent centroid shifts in SIM Lite

Details Mitigation of angle tracking errors due to color dependent centroid shifts in SIM Lite Mitigation of angle tracking errors due to color dependent centroid shifts in SIM Lite

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7734e.144n&link_type=abstract

Optical and Infrared Interferometry II. Edited by Danchi, William C.; Delplancke, Françoise; Rajagopal, Jayadev K. Proceeding

Physics

Optics

Scientific paper

The SIM-Lite astrometric interferometer will search for Earth-size planets in the habitable zones of nearby stars. In this search the interferometer will monitor the astrometric position of candidate stars relative to nearby reference stars over the course of a 5 year mission. The elemental measurement is the angle between a target star and a reference star. This is a two-step process, in which the interferometer will each time need to use its controllable optics to align the starlight in the two arms with each other and with the metrology beams. The sensor for this alignment is an angle tracking CCD camera. Various constraints in the design of the camera subject it to systematic alignment errors when observing a star of one spectrum compared with a start of a different spectrum. This effect is called a Color Dependent Centroid Shift (CDCS) and has been studied extensively with SIM-Lite's SCDU testbed. Here we describe results from the simulation and testing of this error in the SCDU testbed, as well as effective ways that it can be reduced to acceptable levels.

Affiliated with

Also associated with

No associations

Rating

Mitigation of angle tracking errors due to color dependent centroid shifts in SIM Lite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Mitigation of angle tracking errors due to color dependent centroid shifts in SIM Lite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mitigation of angle tracking errors due to color dependent centroid shifts in SIM Lite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1378966