Automatic compensation of antenna beam roll-off in SAR images.

Doerry, Armin Walter

Sandia National Laboratories

关键词: Calibration;    Image Processing Resolution (Optics);    Brightness;    Antenna Arrays.;    Synthetic Aperture Radar.;   

DOI  :  10.2172/923537
RP-ID  :  SAND2006-2632
RP-ID  :  AC04-94AL85000
RP-ID  :  923537

美国|英语

来源: UNT Digital Library

【 摘 要 】

The effects of a non-uniform antenna beam are sometimes visible in Synthetic Aperture Radar (SAR) images. This might be due to near-range operation, wide scenes, or inadequate antenna pointing accuracy. The effects can be mitigated in the SAR image by fitting very a simple model to the illumination profile and compensating the pixel brightness accordingly, in an automated fashion. This is accomplished without a detailed antenna pattern calibration, and allows for drift in the antenna beam alignments.