Improved Imaging of Near Earth Objects Using Better Telescope Specifications Hazel Butler CfAO Akamai Internship Institute for Astronomy Advisors: Stuart Jefferies and Doug Hope
Feb 25, 2016
Improved Imaging of Near Earth Objects Using Better
Telescope SpecificationsHazel Butler
CfAO Akamai InternshipInstitute for Astronomy
Advisors: Stuart Jefferies and Doug Hope
Imaging of Near Earth Objects (NEO) Asteroids, satellites, space debris
Monitor Satellite Health Cost millions Track orbits
Motivation
Telescope Limitations
Diffraction Limit Telescope Aperture Resolution
Atmospheric Distortion R0
Atmospheric Distortion
Planer Light Waves
Atmosphere
Distorted Light Waves
Overcoming this Problem
Adaptive Optics Image Restoration
Prior Information Point Spread Function (PSF)
Uses multiple frames to estimate the PSF and the object
Multi-Frame Blind Deconvolution
Telescope Pupil Function Specify radius of the telescope pupil
My Project
Wrong pupil size Intensity differences error
High IntensityMedium Intensity
Low Intensity
object Point Spread Function
Methodology
Build Pupil
Program
Run Simulations
Build Error Program
Calculate Errors
Analyze Results
Build Intensity
Difference Program
Calculate Errors
Analyze Results Conclusions
)Computing the Error
2
(Estimated Image Truth Image
Truth Image 2
Simulation Parameters
The atmospheric distortion (D/r0) was 5.Intensity Levels
High Threshold (0.05) Low Threshold (0.005)
3 Pupil Radii16 Frames
Total Error Results
0.00E+00
2.00E+13
4.00E+13
6.00E+13
8.00E+13
1.00E+14
1.20E+14
radius 28 radius 30 radius 32
est. psf 25
est. psf 500
Intensity Error Results
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
Radius 28 Radius 30 Radius 32
High
Medium
Low
Conclusions
Pupil Radius SignificanceHigh and Low IntensityImage ImprovementOdd Phase Results
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
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