Comparison of polar formatting and back-projection algorithms for spotlight-mode SAR image formation

Jakowatz, Charles V.; Doren, N.E.

doi:10.1117/12.673249

Cited by 12 publications

(12 citation statements)

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“…That is to say that MAMD is invalid if the wrong RCMC caused by the system calibration error and large APC error. Moreover, PGA and MD cannot be directly applied to squint SAR or WA-SAR [23]. Based on FBP and FFBP, F. D. Garber, et al, indicate that PGA is useful if the images were focused on virtual polar coordinates system [24].…”

Section: () Onmentioning

confidence: 99%

“…To solve the problem of (26), coordinate descent (CD) is an alternative solution [32]. In this paper, after PGA and registration, we rewrite (22) as 00 1 mm I I I   (27) The objective of (27) is to estimate err  , which has the similar optimal function of (23). It is also noted that the of q in 24 I  to estimate and calibrate the phase error.…”

Section: ) Phase Error Calibrationmentioning

confidence: 99%

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A Modified Factorized Geometrical Autofocus Method for Wide Angle SAR

Suo

Zheng

et al. 2021

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Section: () Onmentioning

confidence: 99%

Section: ) Phase Error Calibrationmentioning

confidence: 99%

A Modified Factorized Geometrical Autofocus Method for Wide Angle SAR

Suo

Zheng

et al. 2021

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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“…This method is a good trade-off between computational complexity and image quality [Jakowatz et al, 2004;Jakowatz and Doren, 2006].…”

Section: 1002/2013rs005192mentioning

confidence: 99%

High‐resolution vertical polarimetric imaging of pine forests

et al. 2014

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This paper describes a field campaign performed with a ground-based polarimetric tomographic imager designed to measure the vertical response of several forest plots in order to better understand the mechanisms contributing to the total radar response. The campaign took place in the Mende forest, an artificial forest of European black pines, in the south of France. The objective is to perform a sensitivity study on the radar observables based on biophysical parameters. This paper presents a description of the experiment hardware and procedure, the results obtained for all sites, and a discussion of the results in the light of the ground truth. The results show the vertical distribution of the backscattered intensity for several parameters like tree density, forest growth, presence of undergrowth, and ground slope. The evolution of the energy backscattered by the ground, the volume, and the whole forest structure is also displayed. These results have shown the interest of such a campaign to improve the understanding of the distribution of radar mechanisms along the vertical axis.

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“…This algorithm is based on the fact that spotlight SAR echo signals after demodulation are samples of the Fourier transform of scene reflectivity function on a polar grid in the wavenumber domain. It still prevails nowadays because of its advantages, such as simplicity of real time implementation and also sufficient flexibility regarding the choice of reconstructed image resolution, size and location, over other image formation algorithms [4, 5].…”

Section: Introductionmentioning

confidence: 99%