Autofocus performance on multi channel SAS images in the presence of overlapping phase centers

Herter, Ulrich; Schmaljohann, Holger; Fickenscher, Thomas

doi:10.1109/oceans.2016.7761082

Search citation statements

Order By: Relevance

Paper Sections

Select...

B Approximate Bistatic Model1

Introduction1

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2017

Publication Types

Select...

Other1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Raw data referred to two subsequent pings of 16 tracks sharing 8 overlapped phase centers being 9 − 16 and 1 − 8 from ping 8 and 9 respectively. Motion errors (x (8,9) , y (8,9) , ϑ (8,9) ) = (−3.45, 2.17, 4.1) × 10 −3 are applied. The raw data with no motion errors are plotted in dotted lines.…”

Section: B Approximate Bistatic Modelmentioning

confidence: 99%

See 1 more Smart Citation

A New Framework for Synthetic Aperture Sonar Micronavigation

Caporale,

Petillot

2017

Preprint

View full text Add to dashboard Cite

Synthetic aperture imaging systems achieve constant azimuth resolution by coherently summating the observations acquired along the aperture path. At this aim, their locations have to be known with subwavelength accuracy. In underwater Synthetic Aperture Sonar (SAS), the nature of propagation and navigation in water makes the retrieval of this information challenging. Inertial sensors have to be employed in combination with signal processing techniques, which are usually referred to as micronavigation. In this paper we propose a novel micronavigation approach based on the minimization of an error function between two contiguous pings having some mutual information. This error is obtained by comparing the vector space intersections between the pings orthogonal projectors. The effectiveness and generality of the proposed approach is demonstrated by means of simulations and by means of an experiment performed in a controlled environment.

show abstract