Parallel-Computing Architecture for JWST Wavefront-Sensing Algorithms

Abstract

The James Webb Space Telescope (JWST) is the successor to the Hubble Space Telescope and will be NASA's premier observatory of the next decade. Image-based wavefront sensing (phase retrieval) is the primary method for ground testing and on-orbit commissioning. For ground tests at NASA's Goddard Space Flight Center (GSFC) and Johnson Space Center (JSC), near-real-time analysis is critical for ensuring that pass/fail criteria are met before completion of a specific test. To address this need we have developed a computational architecture for image processing and phase retrieval. Using commercially available off-the-shelf hardware and software, we have designed, implemented, and tested a solution for high-speed parallel computing. The architecture is a hybrid solution utilizing both CPUs and GPUs and exploiting the unique advantages of each. Discussions are presented of the architecture, performance, and current limitations.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2011
Accession Number
ADA550727

Entities

People

  • Alexander Rilee
  • Bruce H. Dean
  • J. S. Smith
  • Thomas P. Zielinski

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Broadband
  • Computational Complexity
  • Computer Architecture
  • Computing System Architectures
  • Data Sets
  • Detectors
  • Flight
  • Infrared Telescopes
  • Measurement
  • Monitoring
  • Parallel Computing
  • Recovery
  • Space Flight
  • Spacecraft
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerospace Engineering.
  • Parallel and Distributed Computing.
  • Systems Analysis and Design

Technology Areas

  • Space
  • Space - Satellites