Magazine Article

General Tool for Evaluating High-Contrast Coronagraphic Telescope Performance Error Budgets

TBMG-9713

04/01/2011

Abstract
Content

The Coronagraph Performance Error Budget (CPEB) tool automates many of the key steps required to evaluate the scattered starlight contrast in the dark hole of a space-based coronagraph. The tool uses a Code V prescription of the optical train, and uses MATLAB programs to call ray-trace code that generates linear beam-walk and aberration sensitivity matrices for motions of the optical elements and line-of-sight pointing, with and without controlled fine-steering mirrors (FSMs). The sensitivity matrices are imported by macros into Excel 2007, where the error budget is evaluated. The user specifies the particular optics of interest, and chooses the quality of each optic from a predefined set of PSDs. The spreadsheet creates a nominal set of thermal and jitter motions, and combines that with the sensitivity matrices to generate an error budget for the system.

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Citation
"General Tool for Evaluating High-Contrast Coronagraphic Telescope Performance Error Budgets," Mobility Engineering, April 1, 2011.
Additional Details
Publisher
Published
Apr 1, 2011
Product Code
TBMG-9713
Content Type
Magazine Article
Language
English