Search

Your search keyword '"Iannini, Lorenzo"' showing total 34 results
Start Over Author "Iannini, Lorenzo"
34 results on '"Iannini, Lorenzo"'

2. A Conceptual Performance Study on a Two-Look ScanSAR Mode Configuration for the Forthcoming ROSE-L Mission

Author

Perna, Stefano, Longo, Francesco, Zoffoli, Simona, Davidson, Malcolm, Iannini, Lorenzo, and Lanari, Riccardo

Abstract

This work shows that additional ScanSAR capabilities, with respect to those achievable through the current synthetic aperture radar (SAR) system of the forthcoming Radar Observation System for Europe at L-band (ROSE-L) mission, may be easily enabled through a proper shaping of the azimuth pattern of the TX radar antenna. In particular, we show that by properly acting only on the distribution of the input excitations of the elements of the currently designed TX antenna array, we can move from a single azimuth-look ScanSAR configuration to a more attractive two-look one. This result is achieved without upsetting the current system architecture and without changing the current mission parameters [such as azimuth resolution, range swath, and pulse repetition frequency (PRF)], all tailored to a one-look ScanSAR configuration. On the other hand, the proposed two-look mode requires to double the azimuth beamwidth with respect to the one-look mode, thus leading to an unavoidable antenna gain decrease, whose amount is approximately 3 dB. The presented analysis also shows that, by still acting on the distribution of the input excitations of the TX antenna array, the scalloping effect can be significantly mitigated with respect to that of the current system design, in both scenarios relevant to the original one-look ScanSAR configuration and the proposed two-look one.

Published
2024
Full Text
View/download PDF

19. PRF Sampling Strategies for Swarmsar Systems

Author

Iannini, Lorenzo, primary, Mancinelli, Alessandro, additional, Lopez-Dekker, Paco, additional, Hoogeboom, Peter, additional, Li, Yuanhao, additional, Uysal, Faruk, additional, and Yarovoy, Alexander, additional

Published
2019
Full Text
View/download PDF

34. Remotely sensed monitoring of small reservoir dynamics: A Bayesian approach

Author

Eilander, Dirk, Annor, Frank O., Iannini, Lorenzo, van de Giesen, Nick, Spatial analysis & Decision Support, and Water and Climate Risk

Abstract

Multipurpose small reservoirs are important for livelihoods in rural semi-arid regions. To manage and plan these reservoirs and to assess their hydrological impact at a river basin scale, it is important to monitor their water storage dynamics. This paper introduces a Bayesian approach for monitoring small reservoirs with radar satellite images. The newly developed growing Bayesian classifier has a high degree of automation, can readily be extended with auxiliary information and reduces the confusion error to the land-water boundary pixels. A case study has been performed in the Upper East Region of Ghana, based on Radarsat-2 data from November 2012 until April 2013. Results show that the growing Bayesian classifier can deal with the spatial and temporal variability in synthetic aperture radar (SAR) backscatter intensities from small reservoirs. Due to its ability to incorporate auxiliary information, the algorithm is able to delineate open water from SAR imagery with a low land-water contrast in the case of wind-induced Bragg scattering or limited vegetation on the land surrounding a small reservoir.

Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results