The grating carrousel mechanism of the Goddard High Resolution Spectrograph for the Hubble Space Telescope

Details The grating carrousel mechanism of the Goddard High Resolution Spectrograph for the Hubble Space Telescope The grating carrousel mechanism of the Goddard High Resolution Spectrograph for the Hubble Space Telescope

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1111...58e&link_type=abstract

IN: Acquisition, tracking, and pointing III; Proceedings of the Meeting, Orlando, FL, Mar. 27-29, 1989 (A90-39001 17-17). Bellin

Mathematics

Logic

Control Systems Design, Hubble Space Telescope, Pointing Control Systems, Ultraviolet Spectrometers, Echelle Gratings, Gratings (Spectra), Mirrors, Onboard Data Processing, Servocontrol

Scientific paper

The active optical elements of the Goddard High Resolution Spectrograph (GHRS) consist of five plane diffraction gratings, one echelle and four nondispersive mirrors. The instrument has eleven modes for ultraviolet spectroscopy and target acquistion. The gratings and mirrors are mounted on a precision mechanism which rotates to position the desired element in the optical path. The requirements for precise image location, high spectral resolution and efficient autonomous operations place stringent demands on its performance. The carrousel is rotated by a brushless dc torque motor, which produces a slew rate of six deg/sec. The 16-bit position encoder provides a granularity of approximately 20 arcsec encoder step. The active electronic control system maintains pointing stability with an rms jitter of 0.13 arcsec, which corresponds to 0.033 pixels of image motion at the detector. The repeatability is such that the image returns to within + or - 0.10 pixels of the same position over 90 percent of the time. This paper describes the mechanical and electronic design, the hardware logic and flight software algorithms which control operation.

Affiliated with

Also associated with

No associations

Rating

The grating carrousel mechanism of the Goddard High Resolution Spectrograph for the Hubble Space Telescope 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 The grating carrousel mechanism of the Goddard High Resolution Spectrograph for the Hubble Space Telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The grating carrousel mechanism of the Goddard High Resolution Spectrograph for the Hubble Space Telescope will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1827653