Observer Anomaly(?): Recent Jitter and PSF Variations

Details Observer Anomaly(?): Recent Jitter and PSF Variations Observer Anomaly(?): Recent Jitter and PSF Variations

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tel..rept....1g&link_type=abstract

Instrument Science Report TEL 2005-01, 12 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute

Scientific paper

An anomaly in the HST Pointing Control System (PCS) has been noticed since June 2004 which results in an increased level of gyro bias in V3, generally at the time HST enters orbital day. This ISR documents Point Spread Function (PSF) and pointing drifts from a recent 5-orbit program with the HRC of ACS. These Grism observations of a bright star were taken in a time-series mode of 95 second integrations, without dithering, for five consecutive orbits on a bright target allowing for unusually high precision measurement of changes in PSF or pointing. Near the time orbital night starts there is a spike in the V3 rms guiding as reported in associated jitter files, at the same time the PSF as measured from the spectrum width shows a transition to larger widths. The correlation between jitter as reported by the PCS, and that measured from the data is only moderately good. The jitter as derived from the data stays high for extended periods while the jitter files report transition back to standard levels.

Affiliated with

Also associated with

No associations

Rating

Observer Anomaly(?): Recent Jitter and PSF Variations 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 Observer Anomaly(?): Recent Jitter and PSF Variations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observer Anomaly(?): Recent Jitter and PSF Variations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-833369