PINGER Sub-Bottom Profiling Demo21/07/2011
|Knudsen Engineering have put their new 15kHz Pinger sub-bottom profiling system through its paces on Lake Champlain Vermont with the support of Middlebury College on their research vessel R/V Baldwin. During the demonstration the Pinger was operated in water as shallow as 1.5 metres. Shallow water has always been a problem for conventional SBP's because of transmission pulse ringing. Data processing was performed with Chesapeake Technologies SonarWiz 5 software.|
The Pinger features chirp transmission and a large aperture receiver using the latest PVDF technology that provides higher directivity while remaining lightweight. The Pinger SBP's receive array also has a wide bandwidth. The same receive array can be used simultaneously for multiple frequencies. Designed to be very portable and lightweight, the Pinger is suited for small boats and shallow-water applications that have been problematic with traditional SBP's.
The results from the Pinger showed very high resolution mapping of the layers, and bedrock as well as depth of penetration. Two very experienced observers onboard during the demonstration, Tom Manley and Garry Kozak both agreed the data were very good and produced results that rivalled conventional large heavy SBP systems. The lightweight system will open up new possibilities in shallow water for surveyors.
Image: During a low stand in Lake Champlain some 9,000 years ago, sediments that were previously deposited during the last glacial retreat during the Lake Vermont stage (14,000 to 13,000yBP; dark area in the lower left-hand corner) as well as those deposited during a time when this region was an extension of the Atlantic Ocean and known as the Champlain Sea (13,000 to 9,600yBP; well-defined dipping laminated sediments) were truncated to form a well-defined sub-marine terrace (est. 8,700 yBP). As the connection to the Atlantic Ocean was terminated due to isostatic rebound, the lake soon returned to freshwater conditions and higher lake levels during the Lake Champlain phase (9,600yBP - present). As lake levels rose, recent Lake Champlain sediments were deposited as the uppermost sequence of layered sediments.
comments powered by Disqus
Read more about:
software data vessel mapping
Supplier: Knudsen Engineering Ltd
More news from this supplier:
Chilly Arctic Remains a Warm Niche
Booming 2007 for Knudsen Engineering
R/V Aranda Turns into Next Generation Marine Research
World ECDIS Day
HELCOM Contributes to Report on Oceans and the Law of the Sea
Oceans of Colour
SA Instrumentationís New Premises Include Specialist Test Facilities
Collaborative Seismic Acquisition Programme offshore Mexico
WHOI Names Mark Abbott as President and Director
Chilean Port Facilitates Oceanographic Data Reporting
ECDIS Kernel v5.20 Improving ECDIS Usability
XIXth International Hydrographic Conference Dates Proposed
How to Use QPS' Qimera to Validate Processed Point Files
QPS Qimera processing software has been released earlier this year. To demonstrate the capabilities, this video shows how to load processed point files into a Qimera Project. It explains what processed point files are; how to specify the coordinate system of the project and the source files; how to create a Dynamic Surface from processed point files and how to change the dynamic surface and adjust the colour map to aid data editing and validation.