May 18, 2008 NGS Engineering

Goals

While basic checkout and calibration of the NGS-AO system were successfully accomplished on April 9, 2008, performance tests were not possible due to clouds and poor seeing. The primary goal of this additional NGS engineering night is to complete the performance characterization of the NGS-AO system after the winter 07/08 optical bench relayout. A secondary goal is the testing of a new iterative reconstructor by L. Lessard and D. MacMynowski.

Personnel schedule

Planning to be present on 5/18/08: Bouchez, Lessard, Roberts, MacMynowski.

Procedures and test plans

Please post your test plans on the Test Plan Library page, and add a link below.

• Daytime tests
  • AO bench setup and checkout (1 hrs) - J. Roberts
    • Tune image on PHARO
  • Test iterative reconstructor with AO stimulus - L. Lessard
• Nighttime tests
  • PHARO vignetting: In twilight, verify even illumination of PHARO wide field.
  • NGS performance (3 hr; stable) - A. Bouchez
  • Throughput (1 hr; clear) - A. Bouchez
    • Use Faint IR standards from Persson et al. 1998
  • Iterative reconstructor - L. Lessard
  • Titan science (ephermeris) - A. Bouchez
  • Platescale (PHARO, ACAM, LOWFS) (1 hr) - A. Bouchez
    • Target list (WDS Calibration Candidates, 2-15" sep., epoch 2008.3815)
  • SSM motion and pupil registration (1 hr) - J. Roberts.
  • Field distortion (30 min - low priority) - A. Bouchez
  • Predictive AO data (10-15 min per data collection, multiple times per night (3-4) if possible - low priority) - J. Roberts

Results