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Improved Imaging of Near Earth Objects Using Better Telescope Specifications

Improved Imaging of Near Earth Objects Using Better Telescope Specifications. Hazel Butler CfAO Akamai Internship Institute for Astronomy Advisors: Stuart Jefferies and Doug Hope. Motivation. Imaging of Near Earth Objects (NEO) Asteroids, satellites, space debris Monitor Satellite Health

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Improved Imaging of Near Earth Objects Using Better Telescope Specifications

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  1. Improved Imaging of Near Earth Objects Using Better Telescope Specifications Hazel Butler CfAO Akamai Internship Institute for Astronomy Advisors: Stuart Jefferies and Doug Hope

  2. Motivation • Imaging of Near Earth Objects (NEO) • Asteroids, satellites, space debris • Monitor Satellite Health • Cost millions • Track orbits

  3. Telescope Limitations • Diffraction Limit • Telescope Aperture • Resolution • Atmospheric Distortion • R0

  4. Atmospheric Distortion Planer Light Waves Atmosphere Distorted Light Waves

  5. Overcoming this Problem • Adaptive Optics • Image Restoration • Prior Information • Point Spread Function (PSF)

  6. Uses multiple frames to estimate the PSF and the object Multi-Frame Blind Deconvolution

  7. Telescope Pupil Function • Specify radius of the telescope pupil

  8. My Project • Wrong pupil size • Intensity differences error Medium Intensity Low Intensity High Intensity object Point Spread Function

  9. Methodology Build Pupil Program Build Error Program Run Simulations Build Intensity Difference Program Analyze Results Calculate Errors Calculate Errors Analyze Results Conclusions

  10. Computing the Error ( ) 2 Truth Image Estimated Image 2 Truth Image

  11. Simulation Parameters • The atmospheric distortion (D/r0) was 5. • Intensity Levels • High Threshold (0.05) • Low Threshold (0.005) • 3 Pupil Radii • 16 Frames

  12. Total Error Results

  13. Intensity Error Results

  14. Conclusions • Pupil Radius Significance • High and Low Intensity • Image Improvement • Odd Phase Results

  15. References and Sources • Astronomy Picture of the Day images http://antwrp.gsfc.nasa.gov/apod/astropix.html • Bracewell, R. The Fourier Transform and its Applications. 2000. McGraw-Hill Higher Education, Boston • Nocedal, J. and Wright, S. Numerical Optimization. 1999. Springer-Verlag New York, Inc., New York • Roggemann, M and Welsh, B. Imaging through turbulance. 1996 CRC press LLC, Boca Raton

  16. Acknowledgements • Institute for Astronomy • Doug Hope • Stuart Jefferies • Cindy Geibink • Center for Adaptive Optics • Malika Bell • Lisa Hunter • Hilary O’Bryan • Maui Economic Development Board • Isla Yap • Maui Community College • Mark Hoffman • Funding provided through the Center for Adaptive Optics, a National Science Foundation Science and Technology Center (STC), AST-987683

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