RBR thermistors array for AOB2

SiPLAB Report 04/06, FCT, University of Algarve,2006.This report describes an electronic circuit board for interfacing the RBR thermistor chain manufactured by Richard Bracker Research, Ontario (Canada), with the Acoustic Oceanographic Buoy (version 2) - AOB2. The interface consists on a set of bridge amplifiers and associated electronics for converting the NTC thermistor signals into temperature related values in the data acquisition CPU control of the AOB2. With this board the temperature measured along the RBR thermistor chain array can be monitored on real time together with the acoustic data via the wireless lan network to which the AOB2 is associated.This work was partially supported by projects RADAR (POCTI/CTA/47719/2002), UAB (POCI/MAR/59008/2004) and NUACE (POSI/CPS/47824/2002) from FCT, Portugal

Acoustic oceanographic buoy (version 2)

SiPLAB Report 05/05, FCT, University of Algarve,2005.This report describes an underwater acoustic data acquisition system, which uses a surface buoy and an underwater array of acoustic and non-acoustic sensors. The surface buoy includes a digital storage unit for the acquired data, a communications system for remote monitoring and data transmission, a digital processing unit for pre-processing of acquired data and a battery power supply. A user manual is included as an installation, setup and maintenance guide for the system and its practical applications. The developed hardware and software is described in detail. Detailed schematics and designs can be found in the final section of this document, these can be used to develop the system, perform maintenance, purchase spare parts or perform any type of modifications.Project RADAR (POCTI/CTA/47719/2002), funded by FCT, Portugal

UAN - Fixed sub-surface notes (projects plan)

This document describes requirements for the Fixed Sub-Surface Nodes (FNO) two of which are to be developed for the Underwater Acoustic Network (UAN) project. The fixed nodes serve as sensor platforms which are to be deployed and work autonomously and cable-less on the sea floor. Communication with these nodes is to be acomplished by using underwater acoustic modems. A description of hardware and software is included in this document. Mechanical drawings can be found in the appendix.This work was supported by project UAN Underwater Acoustic Network) from the European Community's Seventh Framework Programme (FP7/2007-2013) under Grant Agreement # 225669

UAN subsurface telemetry unit. Laboratory tests

SiPLAB Report 07/09, FCT, University of Algarve,2009.This document describes the laboratory tests performed on the Subsurface Telemetry Unit (STU) which was developped for the Underwater Acoustic Network EU-FP7 Project. The tests are separated into mechanical, energy, cable, electronics, acoustic acquisition, STU computer and the base station.This work was supported by project UAN (Underwater Acoustic Network) from the European Community's Seventh Framework Programme (FP7/2007-2013) under Grant Agreement # 225669

Seagrass workshop sea trial data report

Rep 04/11 - SiPLAB October/2011The Seagrass Workshop sea trial took place in a very shallow water area in front of STARESO (Station the recherchessous-marines et oceanographiques), Punta la Revellata, Gulf of Calvi, Corsica from 10 to 19 October 2011, in the frameworkof the Action ES0906 (Seagrass productivity: from genes to ecosystem management) supported by the FP7 Programme COST (European Cooperation in the Field of Scienti c and Technical Research). During this multidisciplinary workshop the participating groups have sampled the Posidonia oceanica eld using di erent methods in order to characterize the seagras individuals and the whole community. This report describes the data gathered by the SiPLAB/Marsensing team, which objective is to characterize the in uence of seagrass oxygen production in acoustic propagation and develop techniques to estimate oxygen production by acoustic means

UAN. Subsurface telemetry unit (STU)

SiPLAB Report 03/10, FCT, University of Algarve,2010.This document describes an underwater acoustic data acquisition system, made of a subsurface telemetry unit (STU), an underwater array of acoustic and non acoustic sensors and a cable connected base station (BS). The telemetry unit includes a digital storage unit for the acquired data, a communications system through a fibre optic data and a power link to a nearby vessel or shore. Acquired data can be streamed in real time to the base station where storage and/or processing can occur. A user manual is included as well as installation, setup and maintenance guide for the system and its practical applications. The developed hardware and software is described in detail. Detailed schematics and drawings can be found in the final section of this document, which can be used to develop the system, perform maintenance, purchase spare parts or perform any type of modifications.This work was supported by project UAN (Underwater Acoustic Network) from the European Community's Seventh Framework Programme (FP7/2007-2013) under Grant Agreement # 225669

Analog 16-hydrophone vertical line array for the acoustic - oceanographic buoy - AOB

SiPLAB Report 03/06, FCT, University of Algarve,2006.This report contains the user guide and the system reference for the analog 16-hydrophone AOB vertical line array. The array is a 67.5m long cable with 16 4m-spaced hydrophones and 17 digital thermistor sensors, distributed along its length. Each module has a dedicated preamplifier to increase signal strength at the hydrophone output and drive a balanced line to transmit the signal to the surface buoy's electronics. The thermistor sensors are digital devices that transmit the temperatures values through a 1-wire digital serial bus. This report presents the system user guide and the system reference guide. The user guide has instructions for system deployment, everyday usage and maintenance. The system reference guide is intended for specialized technicians for system repairing and/or upgrade.This work was partially supported by projects RADAR (POCTI/CTA/47719/2002) and UAB (POCI/MAR/59008/2004) from FCT, Portugal

The acoustic oceanographic buoy telemetry system: an advanced sonobuoy that meets acoustic rapid environmental assessment requirements

In the past few years Rapid Environmental Assessment (REA), applied to shallow waters, has become one of the most challenging topics in ocean acoustics. The REA concept evolved after the cold war when the outset of regional conflicts shifted the potential operational areas from open ocean towards littoral areas, and has been identified by NATO as a new warfare requirement