Method to generate a three-dimensional image of a ground area using a SAR radar
US6384766B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/904
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method for generating a three-dimensional image of a ground area by means of a radar with a synthetic aperture, a SAR radar, which is supported by a platform moving in an essentially rectilinear manner. The method is characterized by the following steps.Advancing the platform such that at least two images of the ground are created with great difference in the angle of illumination.Transmitting radar pulses with a fractional bandwidth which is larger than or equal to 0.1, and using in the computations an aperture angle which is larger than or equal to 0.1 radians.Detecting the reflected radar pulses with amplitude and phase.For each pulse, measuring and storing the position of the antenna that transmits and the antenna that receives the pulse.Computing a two-dimensional SAR signal per synthetic aperture.Starting from the amplitude and phase of the two SAR signals as well as position data for the antennae, reconstructing a three-dimensional position description of the area relative to antenna position data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.