While conducting hydrographic survey operations in the Florida Keys, NOAA Ship Thomas Jefferson served as a test platform for the initial operational implementation of an L-3 Klein HydroChart 5000 Swath Bathymetry Sonar System1 , a hull-mounted phase measuring bathymetric sonar (PMBS). During the project it became apparent that the traditional patch test typically utilized for multibeam echosounder (MBES) systems was poorly suited to the HydroChart – and perhaps other PMBS systems as well. These systems have several inherent characteristics that make it difficult to isolate and subsequently solve for biases under the traditional patch test paradigm: presence of a nadir gap, wide swaths (typically greater than 6 times water depth), and relatively poor object-detection capability in the outer swath. After “rethinking” the patch test to account for these characteristics, the authors propose a new patch test paradigm that is better suited to the HydroChart and other PMBS systems.
Center for Coastal and Ocean Mapping
Journal or Conference Title
US Hydrographic Conference
Apr 25 - Apr 28, 2011
Tampa Bay, FL, USA
Hydrographic Society of America
Eisenberg, Janice; Davidson, Michael; Beaudoin, Jonathan; and Brodet, Steve, "Rethinking the Patch Test for Phase Measuring Bathymetric Sonars" (2011). US Hydrographic Conference. 809.