COSMO-SkyMed second generation SAR image focusing of spotlight data for civilian users

Rino Lorusso; Luca Fasano; Claudia Facchinetti; Giancarlo Natale Varacalli; Paolo Inversi; Francesco Tataranni; Antonella Gallipoli

doi:10.1117/12.2324332

9 October 2018 COSMO-SkyMed di Secunda Generazione SAR image focusing of spotlight data for civilian users

Rino Lorusso, Luca Fasano, Claudia Facchinetti, Giancarlo Natale Varacalli, Paolo Inversi, Francesco Tataranni, Antonella Gallipoli

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Proceedings Volume 10789, Image and Signal Processing for Remote Sensing XXIV; 1078917 (2018) https://doi.org/10.1117/12.2324332
Event: SPIE Remote Sensing, 2018, Berlin, Germany

Abstract

COSMO-SkyMed di Seconda Generazione (CSG) will ensure operational continuity to the currently operating "first generation" CSK constellation. The CSG constellation will consist of two satellites in Low Earth Orbit equipped with an X-band Synthetic Aperture Radar (SAR). The CSG program is managed and co-financed by the Italian Space Agency (ASI) and the Italian Ministry of Defence. A wider portfolio of Spotlight imaging modes is offered with respect to CSK, among which there are new Spotlight civilian sub-metric modes. Furthermore, products acquired with squinted attitude (i.e. mean pitch angle during the acquisition different by zero) or with multi-swath approach could be used to serve more requests in a defined area, that otherwise could not be served because of conflict for time gap violation. Upgraded Spotlight focusing algorithms have been developed in order to correctly manage side-effects on the SAR Impulse Response Function (IRF) image quality depending on the long integration time and squinted geometry. The paper presents the new Spotlight processing algorithm enhancements providing details about design, implementation and verification results. Image quality and processor time performances have been assessed by simulated data representative of the various operational Spotlight CSG acquisition modes.

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Rino Lorusso, Luca Fasano, Claudia Facchinetti, Giancarlo Natale Varacalli, Paolo Inversi, Francesco Tataranni, and Antonella Gallipoli "COSMO-SkyMed di Secunda Generazione SAR image focusing of spotlight data for civilian users", Proc. SPIE 10789, Image and Signal Processing for Remote Sensing XXIV, 1078917 (9 October 2018); https://doi.org/10.1117/12.2324332

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KEYWORDS

Doppler effect

Detection and tracking algorithms

Image processing

Satellites

Synthetic aperture radar

Algorithm development

Target acquisition

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