IMAGING OF OBJECTS VIEWED THROUGH A TURBULENT ATMOSPHERE.
Abstract
This report is concerned with estimating the high-resolution amplitude and phase parameters of the spatial Fourier transform of an object illuminated with incoherent radiation and viewed through a turbulent atmosphere. The Cramer-Rao technique is employed to lower-bound the variance of any unbiased estimator, and receiver structures that approach these bounds are then exhibited. It is found that significant improvement over many existing systems is often possible, provided one is willing to pay for increased system complexity. The reduction of the processors to somewhat less efficient but more practically attractive forms is then considered. Some experimental results are presented which illustrate the effects of turbulence on wave-front coherence. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 03, 1969
- Accession Number
- AD0690837
Entities
People
- John C. Moldon
Organizations
- Massachusetts Institute of Technology