Obtaining Images in a Multiposition System of Synthetic Aperture Radars in the Case of Insufficient Accuracy of Navigation Data

Obtaining Images in a Multiposition System of Synthetic Aperture Radars in the Case of Insufficient Accuracy of Navigation Data

We consider the influence of the navigation data on the radar-image quality in a multiposition synthetic aperture radar system. We propose algorithms for adaptive synthesis with additional focusing, which provide both refinement of the navigation data using the primary radar information and the synt...

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Bibliographic Details
Published in:Radiophysics and quantum electronics Vol. 65; no. 7; pp. 526 - 538
Main Authors: M.Alekseeva, A., Lepekhina, T. A., Likhansky, S. G., I.Nikolaev, V.
Format: Journal Article
Language:English
Published: New York Springer US 01-12-2022
Springer
Springer Nature B.V
Subjects:
Adaptive algorithms
Airborne radar
Algorithms
Astronomy
Astrophysics and Astroparticles
Hadrons
Heavy Ions
Image quality
Lasers
Mathematical and Computational Physics
Navigation
Nuclear Physics
Observations and Techniques
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Quantum Optics
Radar data
Radar equipment
Radar imaging
Remote sensing
Surveys
Synthesis
Synthetic aperture radar
Theoretical
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Summary:We consider the influence of the navigation data on the radar-image quality in a multiposition synthetic aperture radar system. We propose algorithms for adaptive synthesis with additional focusing, which provide both refinement of the navigation data using the primary radar information and the synthesis of images with improved quality. The proposed algorithms are efficient for processing the radar information obtained as a result of both the multiposition and monostatic survey. Using an example of processing the radio holograms, which were obtained from an airborne synthetic aperture radar with inaccurate navigation information, we show the efficiency of the method of a posteriori focusing, determine its efficiency conditions, and conclude on the necessity of adaptation ( a priori focusing) in the case of insufficient accuracy of the navigation data. We take into account that the laws of motion of a couple of carriers can formally be reduced to the law of motion of an equivalent monostatic carrier.
ISSN:0033-8443
1573-9120
DOI:10.1007/s11141-023-10233-3