EP 2065731 A1 20090603 - Method for radiometric calibration of SAR sensors
Method for radiometric calibration of SAR sensors
Methode zur radiometrischen Kalibrierung von SAR Sensoren
Méthode pour l'étalonnage radiométrique des capteurs SAR
IT MO20070363 A 20071127
A method for radiometric calibration of SAR radar sensors comprises the following steps: - selecting from a plurality of images co-recorded by said sensors pixels corresponding to resolution cells on earth comprising targets that maintain the radiometric features unaltered over time, said selecting occurring on a portion of image common to said N images and on the basis of the calculation of a stability index of said radiometric features; - estimating calibrating constants, one for each image; - using said calibrating constants to compensate each of said images, obtaining compensated images; - repeating said estimating by using said compensated images until a convergence is reached, said convergence being defined as a stage of said repeating in which a further repeating does not involve significant variations in the estimation of said calibrating constants.
G01S 13/90 (2006.01); G01S 7/40 (2006.01); G01S 7/41 (2006.01)
G01S 7/40 (2013.01 - EP); G01S 7/41 (2013.01 - EP); G01S 13/90 (2013.01 - EP US); G01S 2007/4082 (2013.01 - EP)
[XY] BIANCA CASSEE: "Selection of Permanent Scatterer Candidates for Deformation Monitoring; Amplitude Calibration of ERS SLC SAR images", 1 September 2004, FACULTY OF CIVIL ENGINEERING AND GEOSCIENCES, DELFT UNIVERSITY OF TECHNOLOGY, DELFT, XP009113783
[Y] LUKOWSKI T I ET AL: "RADARSAT elevation antenna pattern determination", GEOSCIENCE AND REMOTE SENSING, 1997. IGARSS '97. REMOTE SENSING - A SC IENTIFIC VISION FOR SUSTAINABLE DEVELOPMENT., 1997 IEEE INTERNATIONAL SINGAPORE 3-8 AUG. 1997, NEW YORK, NY, USA,IEEE, US, vol. 3, 3 August 1997 (1997-08-03), pages 1382 - 1384, XP010234460, ISBN: 978-0-7803-3836-4
[A] NOFERINI L. ET AL: "Permanent Scatterers Analysis for Atmospheric Correction in Ground-Based SAR Interferometry", IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 43, no. 7, 1 July 2005 (2005-07-01), pages 1459 - 1471, XP011135475, ISSN: 0196-2892
[A] FERRETTI A. ET AL: "Permanent Scatterers in SAR Interferometry", IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 39, no. 1, 1 January 2001 (2001-01-01), XP011021652, ISSN: 0196-2892
EP 2065731 A1 20090603; IT MO20070363 A1 20090528
EP 08170042 A 20081127; IT MO20070363 A 20071127