The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 2006
Filed:
Aug. 17, 2004
Charles T. Hansen, Palos Verdes Estates, CA (US);
Michael E. Lawrence, San Pedro, CA (US);
Charles T. Hansen, Palos Verdes Estates, CA (US);
Michael E. Lawrence, San Pedro, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
Motion compensation for coherent combination of pulses facilitates a SAR image of a scene on earth's surface. A great circle () is centered with respect to the earth's center, The great circle () has an axis () perpendicular to a first plane. Axis () passes through the earth's center. The first plane contains great circle () and includes the earth's center. Great circle () has a first center defined by an intersection of the first plane and axis (). The scene has one or more radar scatterers and is located on a surface (). The radar system is mounted on a moving platform () moving with a component of motion in a direction along great circle (). The radar comprises a radar receiver for digitizing the radar returns having a phase from scatterers on surface (), and a computer for focusing the phase of said radar returns from the scatterers on surface (). The surface () is located on a local scene centerline circle (), the local scene centerline circle () defining a second plane. This second plane is parallel to the first plane. The local scene centerline circle () is centered on the axis at a second center, where the second center is displaced with respect to the first center along the axis by a distance (). The phase of the radar returns received from the scene is compensated for the motion of the moving platform () using a cylindrical coordinate system referenced with respect to the second center to yield a SAR image.