Multi-Frequency Acoustic Water Column Profiler

ASL Environmental Sciences of Sidney (BC, Canada) is releasing the next generation of AWCP - the Multi-Frequency Acoustic Water Column Profiler. The MF-AWCP is capable of operating up to 4 frequencies while maintaining the same precision and low power capacity that the original AWCP had.     The first unit, a two-frequency version, has been delivered to Louisiana State University and a three-frequency version has just been delivered to Oregon State University. The Acoustic Water Column Profiler can monitor the presence and abundance of zooplankton within the water column by measuring acoustic backscatter returns with ultrasonic frequencies. Other sonar targets... (read more)
2009-04-16 09:26:10

L3 Klein CHIRP Sub-bottom Profiler

L-3 Klein has launched a CHIRP Sub Bottom Profiler (SBP) attachment for the 3000 Model Side-scan Sonar. The older SBP was a single transducer 3.5kHz "pinger" and delivered satisfactory performance for a lightweight SBP, but lacked penetration and resolution. The new SBP has a two transmit transducers and linear hydrophone Mills Cross configuration for optimum "sea bottom footprint", as well as a CHIRP transmit pulse.   Deliveries of the new K-CHIRP Model 3310 Sub Bottom Profiler are based on feedback from the demos; this SBP will raise the performance bar for Sub Bottom Profilers at a competitive price. (read more)
2007-08-20 04:04:15

Current Profiler Boost For Ports And Terminals

Many new oceanographic product developments have emerged from the Bergen base of Aanderaa Data Instruments (AADI) over the last two years. The expanding usage of the RDCP600 Doppler current profiler for ship berthing applications is notable. A surface tracking feature, whereby vertical measuring zones (bins) can always be referenced to height below the surface, makes the RDCP600 suited for port, terminal and dockyard type installations where reference to vessel draft is essential.   In support of the RDCP600, but also applicable to other AADI products such as the Seaguard RCM single point current meter, is new browser based, real-time Data... (read more)
2009-03-31 12:36:12

Ice Profiler at LNG Terminal Site

The port of Gros Cacouna on the St Lawrence River downstream of Quebec City is the proposed site of an LNG offloading terminal. Trow Engineering, on behalf of TransCanada and Petro-Canada, hired ASL to collect and process current, wave and ice data at the proposed terminal location. From October through November 2004 an ADCP was moored on site and provided high quality current and wave data. The current data were supplemented by drogued drifter tracks collected by ASL’s project partner, Procean Environment Inc. In November an ASL Ice Profiler was added to the mooring to collect ice draft data over... (read more)
2005-02-07 12:00:00

GMGS Buys Atlas Parasound Sub-bottom Profiler

Guangzhou Marine Geological Survey (GMGS) in China has awarded Atlas Hydrographic a contract to supply an Atlas Parasound hull-mounted sub-bottom profiler with full ocean depth range capability for its vessel Fen Dou 5. Delivery of the system is scheduled for February 2014. The system configuration consists of Atlas Parasound electronics, a pair of small-sized transducers, a transducer casing, Atlas Hydromap Control software for sensor steering and control, and Atlas Parastore software for data acquisition, storage and visualisation. The Parasound is a versatile sub-bottom profiler which is being operated by marine geologists on many research vessels around the globe. By making... (read more)
2013-11-19 02:42:22

2MHz Channel Added to Acoustic Zooplankton Fish Profiler

With its selection for inclusion in the US Ocean Observatories Initiative (OOI) in 2014, ASL’s Acoustic Zooplankton Fish Profiler (AZFP) is becoming the global standard for autonomous scientific multi-frequency echosounders. A 2MHz channel has been added to its product, which already includes 38, 70, 125, 200, 455 and 769kHz. This high-frequency, short-range channel is aimed at studies involving sediment and small zooplankton. The cabled single frequency 2MHz transducer (image) has a nominal beam angle of 7 degrees at -3dB matches the other high frequency AZFP channels, suited for multiple-frequency studies. The ASL AZFP is a tool for scientific research and... (read more)
2015-06-18 09:12:56

Raft-mounted Multifrequency Acoustic Zooplankton Fish Profiler with Cellular Modem

The National Research Institute of Fisheries Engineering (NRIFE, Kamisu) of the Japan Fisheries Research and Education Agency (FRA, Yokohama) has been deploying an ASL Environmental Sciences multifrequency Acoustic Zooplankton Fish Profiler (AZFP 125, 200, 455 and 769kHz) in Yamada Bay, 450km north of Tokyo, since 2013. The collected data is being used to understand seasonal variations of zooplankton in the water column. As the AZFP is battery powered and enclosed in a pressure case, periodic recovery has been necessary to access the data. To help the scheduling of the release of hatchery reared juvenile salmon and increase their survival in... (read more)
2018-03-06 08:50:58

Ageotec Launches New Mini Sound Velocity Probe and Profiler

Ageotec has extended its Sound Velocity Probes range with the introduction of IMSV, a new advanced system for real time velocity measurement of sound propagation in water. Very rugged, accurate, easy to calibrate cheap and lightweight; based on CTD measurement and conversion with Chen & Millero formula, IMSV is also more affordable and robust than other systems based on direct Sound Velocity Measure.   Ageotec offers both Titanium version for fixed probe used for beamforming on Multibeam echosounders and other acoustics devices, and AISI 316 version for 2000 metres depth profiler.   Available from September.  (read more)
2009-08-26 04:46:05

ASL Announces 2018 Acoustic Zooplankton Fish Profiler (AZFP) Award Winner

ASL Environmental Sciences has announced the winner of its third annual Acoustic Zooplankton Fish Profiler (AZFP) award. Dr Lilian Lieber, research fellow at Queen's University Belfast, has been selected to receive the use of one of ASL's four-frequency (38/125/200/455kHz) AZFPs for her proposal entitled 'Drivers of Predator-Prey Coherence in Energetic Environments'. As marine renewable energy projects have led to a rapid increase in the installation of tidal turbines in coastal channels, it is increasingly important to understand the bio-physical mechanisms driving predator–prey interactions in these highly dynamic environments. The award includes the free-of-charge use of a four-frequency AZFP including batteries... (read more)
2018-09-11 09:16:00

AML Moving Vessel Profiler to Augment NSCC’s Seafloor Mapping Work

A newly acquired AML Moving Vessel Profiler (MVP) will help Nova Scotia Community College (NSCC) develop improved methods of mapping the seafloor. With its ability to conduct real-time, vertical profiles continuously and automatically, the MVP200 is expected to improve the efficiency and quality of data collection. Looking to add ground-truthing to the process of multibeam data acquisition, AML and NSCC are working together to integrate lights and a high-resolution camera to the tow body that houses the underway profiling system’s sound velocity (SV), conductivity-temperature-depth (CTD), or multiparameter instrumentation. Ground-truthing is a critical step in validating the seafloor characteristics for interpretation of... (read more)
2019-08-08 09:19:02
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