Computer Science – Performance
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5491..373n&link_type=abstract
New Frontiers in Stellar Interferometry, Proceedings of SPIE Volume 5491. Edited by Wesley A. Traub. Bellingham, WA: The Intern
Computer Science
Performance
Scientific paper
We present a study of how the TPF interferometer sensitivity relates to vibration level and control system performance. The error budgets for the TPF interferometer have two parts: the null floor, i.e. the suppression of starlight leakage due to instrument imperfections and performance limits; and null variation, i.e. planet-mimicking signal variations due to instrument errors and performance variations. The first impacts the statistical noise and thus the integration time; the second represents a planet sensitivity floor which limits further improvement with integration time. Oliver Lay (JPL) has developed an extensive analysis tool known as the Interferometer Performance Model (IPM) for managing both budgets. The budgets we use have many of the same features, but are less well-developed; the requirements are similar. Here we develop an example implementation of the TPF interferometer control system, analyze the system performance using an integrated model, and show that it meets the TPF planet sensitivity requirements using our performance budgets. We summarize key requirements and lessons arising from this exercise.
Lieber Mike
Noecker Charley
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