Transcript BigCuts_Claire_Don.ppt

Some (wild?) ideas for big cuts
Consider cost savings, performance hits, science losses if:
1. We only have one fixed constellation of laser guide stars
(both for science and TT).
2. We only have one LGS WFS plate scale.
3. We don’t have natural guide star mode at all. Two cases:
1. Science proposed for NGS with NGAO
2. Backup science with NGS when NGAO lasers can’t be used.
• Both could be met to some extent by current NGS AO system,
given sufficient scheduling flexibility.
4. We didn’t have a truth wavefront sensor at all.
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