Bibliographic Citation
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Title | A self-cohering technique for linear arrays using the Phase Gradient Autofocus Algorithm |
Creator/Author | Wahl, D.E. |
Publication Date | 1991 Feb 01 |
OSTI Identifier | OSTI ID: 6253031; DE91009099 |
Report Number(s) | SAND-90-2519 |
DOE Contract Number | AC04-76DP00789 |
Resource Type | Technical Report |
Resource Relation | DOE Project |
Research Org | Sandia National Labs., Albuquerque, NM (USA) |
Sponsoring Org | DOE;USDOE, Washington, DC (USA) |
Subject | 440800 -- Miscellaneous Instrumentation-- (1990-) ;990200 -- Mathematics & Computers; SONAR-- ALGORITHMS;SONAR-- FOCUSING; CORRECTIONS;DATA ANALYSIS;P CODES;PHASE SHIFT;SOUND WAVES |
Related Subject | COMPUTER CODES;MATHEMATICAL LOGIC;MEASURING INSTRUMENTS;RANGE FINDERS |
Description/Abstract | A towed linear hydrophone array is subject to snakelike bending.^If the array were processed as if it were truly linear, poor array gain coupled with a degraded source bearing estimate would result.^The signal phase errors produced by sensor position uncertainty in passive sonar arrays are similar to those observed in Synthetic Aperture Radar (SAR) imagery.^The Phase Gradient Autofocus (PGA) Algorithm has been shown to be a robust and effective method used to extract degrading phase errors prevalent in SAR imagery.^This report shows that with slight modifications, the PGA algorithm can be applied to correct phase errors resulting from sensor position uncertainty introduced into linear-passive arrays.^The results of the technique applied to simulated linear array data is also presented.^9 refs., 8 figs. |
Country of Publication | United States |
Language | English |
Format | Pages: (18 p) |
Availability | OSTI; NTIS; GPO Dep. |
System Entry Date | 2001 May 13 |
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