Astrometric Stability of SIM Guide Stars

Details Astrometric Stability of SIM Guide Stars Astrometric Stability of SIM Guide Stars

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20115102c&link_type=abstract

American Astronomical Society Meeting 201, #151.02; Bulletin of the American Astronomical Society, Vol. 35, p.576

Astronomy and Astrophysics

Astronomy

Scientific paper

SIM measures positions of target stars within a `tile' of 7.5 degree radius, over a period of about an hour. During these measurements, SIM must continuously monitor a pair of 7th magnitude guide stars with its guide interferometers, to determine 'feed-forward' corrections to its pointing direction.
These SIM guide stars must themselves be astrometrically stable; the requirement is driven by SIM's narrow-angle accuracy requirement of 1 uas in ten chops. Since the narrow angle measurement takes about 20 minutes, we set a nominal guide star stability requirement of 0.3 uas in 20 minutes, or about 1 uas in an hour.
In this paper we investigate the astrometric stability of SIM guide star candidates (selected from the Hipparcos catalog) over a one-hour tile measurement.
This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.

Affiliated with

Also associated with

No associations

Rating

Astrometric Stability of SIM Guide Stars 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 Astrometric Stability of SIM Guide Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Astrometric Stability of SIM Guide Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1891656