TerraSond's knowledge and ability to manage new technologies enables us to play a key role in the surveying and mapping industry.
We own and maintain a large suite of complex software and equipment that is necessary for executing accurate land and hydrographic surveying and mapping. The technology includes specialized tools for obtaining measurements and performing calculations on land and water that are essential for creating, editing and analyzing spatial and attribute data.
We support our staff's ability to manage new technologies by providing additional education and training. We also encourage hands-on experience to increase the conceptual understanding of geographic information systems (GIS) and their practical application for our projects.
Side Scan Sonar Systems
TerraSond has considerable experience with side scan sonar technology; owning and operating a series of side scan systems since 1994. The latest systems purchased are two Edgetech 4200S systems. These are digital chirp systems that are software configurable for either high speed (multi-ping)or high definition modes.
Side scan sonar systems are commonly used by marine researchers to search for and detect objects on the sea floor.
A side scan sonar system requires three components-a towfish that sends and receives acoustic pulses, a transmission cable attached to the towfish that sends data to the ship, and the ship's processing computer. In a side scan the transmitted energy is formed into the shape of a fan that sweeps the sea floor from directly under the towfish to either side, typically to a distance of 100 meters. The computer plots the data points so that scientists can visualize the found object or sea floor feature. While the shape of the sea floor and objects on it can be well-depicted, most side scan systems can not provide any depth information.
EdgeTech DF1000 The Edgetech DF1000 sidescan system provides digital, high resolution sonar images of the seafloor. Key performance features include Data Fusion (low and high frequency data blended on record), Saf-T-link recovery system, magnetic heading sensor and acoustic responder. Both low and high frequency data is simultaneous…
Imagenex 872 "YellowFin" The Imagenex 872 "YellowFin" is a full-featured dual channel, high resolution, sidescan sonar. Data is displayed in real-time, with or without speed correction, in 9 user selectable colour tables.