31 March 1982 Jitter-Induced Clutter In Staring Sensors Arising From Background Spatial Radiance Gradients
Author Affiliations +
Abstract
Jitter induced clutter leakage in a staring sensor depends on the spatial gradients of background radiance, the detector footprint, and the line-of-sight-jitter frequency characteristics. The clutter problem is very severe when there are sharp radiance gradients or edges in the scene. Clutter leakage models which describe the background by a spatial power spectrum underestimate clutter leakage because they lose the edge information. The model developed in this paper relates clutter leakage to background radiance gradients and the sensor characteristics. The distribution of clutter amplitudes is not Gaussian (even for Gaussian jitter and spatially Gaussian backgrounds); extreme values occur much more often than predicted by PSD analyses. These extreme values affect sensor threshold levels and the associated system data rates. An effective "jitter equivalent angle" is derived for the sensor which is independent of the background. Analysis of Skylab photos in the visible and near IR spectral regions indicates radiance gradients are approximately exponentially distributed and the RMS jitter clutter leakage is proportional to the footprint size raised to the 1.5 power.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul K. Mazaika, "Jitter-Induced Clutter In Staring Sensors Arising From Background Spatial Radiance Gradients", Proc. SPIE 0304, Modern Utilization of Infrared Technology VII, (31 March 1982); doi: 10.1117/12.932664; https://doi.org/10.1117/12.932664
PROCEEDINGS
14 PAGES


SHARE
RELATED CONTENT

Image Registration By A Statistical Method
Proceedings of SPIE (January 09 1984)
Statistical Modeling Of Scene Variability
Proceedings of SPIE (March 31 1982)
Utility Of Infrared Measurements Programs
Proceedings of SPIE (March 31 1982)
Performance Evaluation Of Image Correlation Techniques
Proceedings of SPIE (September 04 1979)

Back to Top