Detecting multiple slow-moving targets in SAR images

2005 ◽  
Author(s):  
R. Linnehan ◽  
L. Perlovsky ◽  
I.L.T.C. Mutz ◽  
M. Rangaswamy ◽  
J. Schindler
Keyword(s):  
Moving Targets ◽  
Sar Images ◽  
Slow Moving

Detecting slow moving targets in SAR images

2004 ◽  
Author(s):  
Robert Linnehan ◽  
Leonid Perlovsky ◽  
Chris W. Mutz ◽  
John Schindler
Keyword(s):  
Moving Targets ◽  
Sar Images ◽  
Slow Moving

scholarly journals Extended GLRT Detection of Moving Targets for Multichannel SAR Based on Generalized Steering Vector

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1478
Author(s):  
Chong Song ◽  
Bingnan Wang ◽  
Maosheng Xiang ◽  
Wei Li
Keyword(s):  
Likelihood Ratio ◽  
Likelihood Ratio Test ◽  
Moving Target ◽  
Ratio Test ◽  
Constant False Alarm Rate ◽  
Moving Targets ◽  
Sar Images ◽  
Steering Vector ◽  
Current Cell ◽  
Data Vector

A generalized likelihood ratio test (GLRT) with the constant false alarm rate (CFAR) property was recently developed for adaptive detection of moving targets in focusing synthetic aperture radar (SAR) images. However, in the multichannel SAR-ground moving-target indication (SAR-GMTI) system, image defocus is inevitable, which will remarkably degrade the performance of the GLRT detector, especially for the lower radar cross-section (RCS) and slower radial velocity moving targets. To address this issue, based on the generalized steering vector (GSV), an extended GLRT detector is proposed and its performance is evaluated by the optimum likelihood ratio test (LRT) in the Neyman-Pearson (NP) criterion. The joint data vector formulated by the current cell and its adjacent cells is used to obtain the GSV, and then the extended GLRT is derived, which coherently integrates signal and accomplishes moving-target detection and parameter estimation. Theoretical analysis and simulated SAR data demonstrate the effectiveness and robustness of the proposed detector in the defocusing SAR images.

scholarly journals Iterative minimum entropy algorithm for refocusing of moving targets in SAR images

2019 ◽  
Vol 13 (8) ◽  
pp. 1279-1286 ◽  
Author(s):  
Yichang Chen ◽  
Gang Li ◽  
Qun Zhang
Keyword(s):  
Minimum Entropy ◽  
Moving Targets ◽  
Sar Images

Dynamic Auditory Preview for Visually Guided Target Aiming

1995 ◽  
Vol 39 (21) ◽  
pp. 1415-1419 ◽  
Author(s):  
Bartholomew Elias
Keyword(s):  
Sound Source ◽  
Visual Target ◽  
Visual Display ◽  
Sound Stimulus ◽  
Auditory Display ◽  
Visually Guided ◽  
Moving Targets ◽  
Slow Moving ◽  
Target Performance ◽  
Velocity Mismatch

The effects of a dynamic auditory preview display were examined in a visual target aiming task. A moving sound stimulus aligned with a visual target was presented over various distances beyond the bounds of a visual display. Results indicated reduced error magnitudes in aimed responses to visual targets with increasing auditory preview distance. In subsequent testing, the effects of position and velocity misalignments between the sound source and the visual target were assessed. In position misalignment conditions where the sound source lagged behind the visual target, higher error magnitudes were observed. However, when the auditory display preceded the visual target, performance improved. In velocity mismatch conditions, responses toward fast moving targets improved when a relatively faster sound source was previewed but were disrupted when a slower sound source was previewed. On the contrary, responses toward slow moving targets improved when a relatively slower sound source was previewed and were disrupted when a faster sound source was previewed.

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