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

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

Hernandez-Burgos, Sergi (Universitat Politecnica de Catalunya)
Gibert, Ferran (IsardSAT)
Broquetas, Antoni (Universitat Politecnica de Catalunya)
Kleinherenbrink, M. (TU Delft Mathematical Geodesy and Positioning)
De la Cruz, Adrian Flores (IsardSAT)
Gomez-Olive, Adria (IsardSAT)
Garcia-Mondejar, Albert (IsardSAT)
Aparici, Monica Roca i. (IsardSAT)

2024

The 2-D 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 article, we provide a closed-form description of a 2-D 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 the 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.

Altimetry
delay/Doppler altimetry
Earth
Fully-Focused SAR
omega-K
Program processors
Radar antennas
SAR altimetry
Satellites
Spaceborne radar
Synthetic aperture radar
synthetic aperture radar (SAR)

http://resolver.tudelft.nl/uuid:4386cd46-00c0-475a-bcfd-3e56380b9f3c

https://doi.org/10.1109/TGRS.2024.3367544

0196-2892

IEEE Transactions on Geoscience and Remote Sensing, 62, 1-16

Institutional Repository

journal article

© 2024 Sergi Hernandez-Burgos, Ferran Gibert, Antoni Broquetas, M. Kleinherenbrink, Adrian Flores De la Cruz, Adria Gomez-Olive, Albert Garcia-Mondejar, Monica Roca i. Aparici