Phase-gradient stellar image reconstruction

Aitken, George J. M.; Johnson, Robert W.; Houtman, Reynold

doi:10.1016/0030-4018(86)90375-5

Cited by 14 publications

(12 citation statements)

References 4 publications

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“…Although this data model is defined in the phase- (3)(4) The shifting process is illustrated in Figure 3-l(a), (b) and (c). -42 -…”

Section: Input the Complex Imagementioning

confidence: 99%

“…Clutter is just a collection of scatters that are considered indistinguishable because their radar cross sections are statistically identical but independent. (1)(2)(3) that is, the greater the bandwidth the greater the resolution. While range resolution is achieved with a wide-bandwidth signal, azimuth or cross-range resolution is achieved with a narrow-beam antenna.…”

Section: Principles Of Sarmentioning

confidence: 99%

“…Substituting (2)(3)(4)(5)(6)(7)(8) into (2)(3)(4)(5)(6)(7) and replacing x(tm) with V(t) tm where V(t) is the instantaneous along-track platform velocity and noting that…”

Section: Azimuth Compressionmentioning

confidence: 99%

“…Substituting 2R/c for time delay, z, in (2)(3)(4)(5), where 2R is the round-trip range and c is the velocity of light, results in…”

Section: I--mentioning

confidence: 99%

“…The output of the mixer (which is synonymous with demodulator or deramper) for a single term of the discrete summation in equation (2)(3)(4) is…”

Section: I--mentioning

confidence: 99%

See 4 more Smart Citations

On the convergence of the phase gradient autofocus algorithm for synthetic aperture radar imaging

Hicks¹

1996

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“…Although this data model is defined in the phase- (3)(4) The shifting process is illustrated in Figure 3-l(a), (b) and (c). -42 -…”

Section: Input the Complex Imagementioning

confidence: 99%

Section: Principles Of Sarmentioning

confidence: 99%

“…Substituting (2)(3)(4)(5)(6)(7)(8) into (2)(3)(4)(5)(6)(7) and replacing x(tm) with V(t) tm where V(t) is the instantaneous along-track platform velocity and noting that…”

Section: Azimuth Compressionmentioning

confidence: 99%

“…Substituting 2R/c for time delay, z, in (2)(3)(4)(5), where 2R is the round-trip range and c is the velocity of light, results in…”

Section: I--mentioning

confidence: 99%

“…The output of the mixer (which is synonymous with demodulator or deramper) for a single term of the discrete summation in equation (2)(3)(4) is…”

Section: I--mentioning

confidence: 99%

See 3 more Smart Citations

On the convergence of the phase gradient autofocus algorithm for synthetic aperture radar imaging

Hicks¹

1996

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Notes on Noise Calibration of Speckle Imagery

Hege

1989

Diffraction-Limited Imaging With Very Large Telescopes

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Diffraction-limited imaging from the ground - Measurement of stellar spatial spectra

Aitken

1989

PASP

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Algorithms and computational developments in recent years have yielded suitable techniques for overcoming the resolution limits imposed on conventional astronomical observations by atmospheric turbulence. The Knox-Thompson, triple-correlation, and phase-gradient algorithms are capable of reconstructing the diffraction-limited, complex spatial spectrum of an object from a sequence of short-exposure images. The basic principles of these techniques are reviewed with emphasis on photon-limited operation at visible wavelengths. Practical considerations, magnitude limits, and examples of recent applications are presented.

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Phase-gradient stellar image reconstruction

Cited by 14 publications

References 4 publications

On the convergence of the phase gradient autofocus algorithm for synthetic aperture radar imaging

On the convergence of the phase gradient autofocus algorithm for synthetic aperture radar imaging

Notes on Noise Calibration of Speckle Imagery

Diffraction-limited imaging from the ground - Measurement of stellar spatial spectra

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