Moving Target Detection with Along-Track SAR Interferometry. A Theoretical Analysis

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Authors
  1. Gierull, C.H.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
This technical report analyses, theoretically, the capability of ground moving target detection based on the SAR along-track interferometric phase. The probability density function of the interferometric phase is derived for the general case that moving target signals are superimposed upon the stationary clutter. This theoretical analysis is an extension of the known statistics for the clutter-only case. Several target models are proposed that depend on one hand on the spatial dimension of the moving target compared to the multilook resolution cell size, and on the other hand on the backscattering type, i.e., deterministic or random target signal. The derived density functions provide the means to quantify the performance limits (by determining the receiver operating characteristics) for any set of system and target parameters, such as false alarm rate, signal-to-clutter ratios (SCR) and target velocities. Hence, deeper insight is provided into results expected from upcoming SAR/GMTI systems such as the Radarsat2 Modex experiment or the enhanced airborne Aurora CP-140 SpotSAR system.

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Keywords
ATI (Along-track interferometry);GMTI (Ground Moving Target Indicator);Clutter cancellation;Along-track interferometry;SAR processing;Along track resolution;RADARSAT
Report Number
DRDC-OTTAWA-TR-2002-084 — Technical Report
Date of publication
01 Aug 2002
Number of Pages
60
DSTKIM No
CA021346
CANDIS No
518105
Format(s):
Hardcopy;CD ROM

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