The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community
Issue link: http://sea-technology.epubxp.com/i/477967
14 st / March 2015 www.sea-technology.com numerous safety protocols, including clamping systems, break-away mounts and a shear-pin, weak link, which will release the system in the event of a hang-up. The system is constructed out of fberglass components, with pods designed to house each magnetic sensor and a large tail section for aerodynamic stability. These pods each contain an adjustable gimbal and removable covers for easy access and realignment of the sensors. The gradi- ometer can house up to 10 potassium vapor magnetom- eters mounted in pairs within the Y-Z plane at the front of the frame. Each sensor pair is vertically separated by 5 feet and laterally by 7.5 feet, with an effective swath width of 30 feet. The gradiometer is uniquely designed to keep a large separation between the equipment electronics and the magnetic sensors. This allows for cleaner data collection unaffected by electronic noise. By design, the sensor po- sitions not only allow for the measurement of a vertical gradient (difference between the vertical sensor pairs), but also the cross-line gradient (difference between lateral Our airborne technology is also ideal for the detection of single UXO targets, in both marine and terrestrial envi- ronments. Depending on the level of detail required, our airborne platform can be modifed with twice as many sen- sors to achieve tighter sensor spacing and fy at half the speed for improved sample density. This surveying tech- nique is ideal in situations where it is not safe to set foot on the ground; in swampy areas where land-based meth- ods are too diffcult to achieve; where wide-open areas can be covered in search of target areas or large muni- tions types; and in shallow-water environments, especially where boats cannot navigate or environmental protection is an issue. Magnetic Gradiometer System This technology is a custom-designed, multisensor po- tassium magnetic gradiometer. The system is towed by a helicopter on a 100-foot-long tow cable that completely isolates the sensors from helicopter noise. The tow cable is designed to hold the weight of the system and integrates (Top) Airborne survey comparison over a high- target density coastline. (Bottom) Waterborne survey comparison over a high-target density coast- line.