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A Fully-Focused SAR Omega-K Closed-Form Algorithm for the Sentinel-6 Radar Altimeter: Methodology and Applications

The two-dimensional frequency-based omega-K method is known to be a suitable algorithm for Fully-Focused SAR (FF-SAR) radar altimeter processors, as its computational efficiency is much higher than equivalent time-based alternatives without much performance degradation. In this paper we provide a cl...

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Published in:	IEEE transactions on geoscience and remote sensing 2024-01, Vol.62, p.1-1
Main Authors:	Hernandez-Burgos, Sergi, Gibert, Ferran, Broquetas, Antoni, Kleinherenbrink, Marcel, De la Cruz, Adrian Flores, Gomez-Olive, Adria, Garcia-Mondejar, Albert, Aparici, Monica Roca i
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Language:	English
Subjects:	Algorithms Altimeters Altimetry Closed form solutions delay/Doppler altimetry Earth Exact solutions Fully-Focused SAR Microprocessors omega-K Performance degradation Program processors Radar Radar altimeters Radar antennas Radio altimeters SAR (radar) SAR altimetry Satellites Spaceborne radar Swell Synthetic aperture radar synthetic aperture radar (SAR)
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container_title	IEEE transactions on geoscience and remote sensing
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creator	Hernandez-Burgos, Sergi Gibert, Ferran Broquetas, Antoni Kleinherenbrink, Marcel De la Cruz, Adrian Flores Gomez-Olive, Adria Garcia-Mondejar, Albert Aparici, Monica Roca i
description	The two-dimensional frequency-based omega-K method is known to be a suitable algorithm for Fully-Focused SAR (FF-SAR) radar altimeter processors, as its computational efficiency is much higher than equivalent time-based alternatives without much performance degradation. In this paper we provide a closed-form description of a two-dimensional frequency domain omega-K algorithm specific for instruments such as Poseidon-4 onboard Sentinel-6. The processor is validated with real data from point targets and over open ocean. Applications such as ocean swell retrieval and lead detection are demonstrated, showing the potentiality of the processor for future operational global-scale products.
doi_str_mv	10.1109/TGRS.2024.3367544
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subjects	Algorithms Altimeters Altimetry Closed form solutions delay/Doppler altimetry Earth Exact solutions Fully-Focused SAR Microprocessors omega-K Performance degradation Program processors Radar Radar altimeters Radar antennas Radio altimeters SAR (radar) SAR altimetry Satellites Spaceborne radar Swell Synthetic aperture radar synthetic aperture radar (SAR)
title	A Fully-Focused SAR Omega-K Closed-Form Algorithm for the Sentinel-6 Radar Altimeter: Methodology and Applications
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