Sensitivity of the Deconvolution of Acoustic Transients to Green's Function Mismatch
Abstract
In this paper various measurements of acoustic time series recorded in the Atlantic over source-to-receiver ranges of 600 to 12,900 m are analyzed. The transmitted source signature with a monitor hydrophone mounted on the source array was also recorded. The signature distortion introduced by propagation effects was treated by the use of single-channel deconvolution. In situations where the Green's function structure is simple (e.g., direct arrival and surface reflection), single-channel deconvolution gave satisfactory results. When multipath effects (due to interaction with layered bottom sediments) were present, it was difficult to get a good source estimate. A way was developed of perturbing the Green's functions such that the source estimates were guaranteed to improve. In most cases it was found that very small changes could produce significant improvement in the source estimates. This sensitivity was quantified by using the correlation coefficient. This sensitivity is not to be confused with the wellknown fact that the single channel deconvolution problem is ill- posed. That issue was treated separately. Transients, Distributed sensors coherence, Detection, Classification.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1993
- Accession Number
- ADA269709
Entities
People
- James H. Leciere
- Michael K. Broadband
- Robert L. Field
Organizations
- United States Naval Research Laboratory