(19)

(11)

EP 1 281 042 A1

(12)

(43) Date of publication: 05.02.2003 Bulletin 2003/06 (21) Application number: 01970507.8 (22) Date of filing: 13.04.2001

(51) International Patent Classification (IPC)7: G01C 3/08, H04J 14/02, H01S 3/00 (86) International application number: PCT/US0112/025 (87) International publication number: WO 0109/0691 (29.11.2001 Gazette 2001/48)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 14.04.2000 US 549497 14.04.2000 US 197777 P (71) Applicant: Optical Air Data Systems, LP Manassass, VA 20111 (US)	(72) Inventor: ROGERS, Philip, L.c/o Optical Air Data Manassass, VA 20111 (US) (74) Representative: Jacquard, Philippe Jean-Luc et al CABINET ORES,6, Avenue de Messine 75008 Paris 75008 Paris (FR)