The Accuracy Limit of Area Correlation Guidance

One of the inherent advantages of area correlation guidance over object tracking guidance is greater guidance system flexibility. Another advantage is significantly improved system accuracy, especially if tracking is to be terminated well ahead of vehicle impact. The accuracy inherent in the area co...

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Bibliographic Details
Published inIEEE transactions on aerospace and electronic systems Vol. AES-2; no. 4; pp. 719 - 724
Main Author Altman, G. G.
Format Journal Article
LanguageEnglish
Published IEEE 01.07.1966
Subjects
Autocorrelation
Correlators
Distortion
Error analysis
Frequency domain analysis
Image sensors
Navigation
Noise figure
Noise level
Vehicles
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ISSN0018-9251
DOI10.1109/TAES.1966.4501904

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Summary:One of the inherent advantages of area correlation guidance over object tracking guidance is greater guidance system flexibility. Another advantage is significantly improved system accuracy, especially if tracking is to be terminated well ahead of vehicle impact. The accuracy inherent in the area correlation process is the subject of this paper. It is unique because accuracy analysis is based upon the power spectral density function of the terrain/reference combination, rather than upon terrain autocorrelation function as are most other publications concerning this subject. For the purpose of this accuracy analysis, only error sources inherent to the correlation process are considered. The constituent error contributions are analyzed and combined and a correlation process error expression is derived. This is followed by a simplified parametric-numerical illustrative example.
ISSN:0018-9251
DOI:10.1109/TAES.1966.4501904