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(11)

EP 2 652 521 A1

(12)

(43) Date of publication: 23.10.2013 Bulletin 2013/43 (21) Application number: 11807655.3 (22) Date of filing: 13.12.2011

(51) International Patent Classification (IPC):  G01S 19/11(2010.01) G01S 5/02(2010.01) G01S 5/14(2006.01) G01S 19/48(2010.01) (86) International application number: PCT/EP2011/072658 (87) International publication number: WO 2012/080281 (21.06.2012 Gazette 2012/25)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 16.12.2010 EP 10275130 (71) Applicant: Astrium Limited Stevenage, Hertfordshire, SG1 2AS (GB)	(72) Inventors: MORRISON, Russell Portsmouth, Hampshire PO3 5PU (GB) DIXON, Charles Portsmouth, Hampshire PO3 5PU (GB) DUMVILLE, Mark Nottingham, Nottinghamshire NG2 1RT (GB) ROBERTS, William Nottingham, Nottinghamshire NG2 1RT (GB) (74) Representative: Cork, Robert et al Venner Shipley LLP 200 Aldersgate London EC1A 4HD London EC1A 4HD (GB)