Sentences with phrase «acoustic backscatter»
The glider used optical and acoustic backscatter — techniques similar to radar in which sound or light is bounced off of surroundings and analyzed upon return — to survey the water for sediment particles of two different sizes (0.4 and 0.1 millimeter) commonly used in models.
https://eos.org/
When this value was multiplied by the mean layer thickness and aggregation area estimated from the ADCP backscatter data, we estimated a total biomass of 2.0 million tons with krill comprising an estimated 88.4 % of the total acoustic backscatter.
Not exact matches
Based on its extensive field programme, ECO2 recommends that overburden, seabed, and water column should be monitored with 3 - D seismic techniques, high - resolution bathymetry or backscatter mapping of the seabed, hydro - acoustic imaging of gas accumulations and outlets, video and photo imaging, chemical detection of dissolved CO2 in ambient bottom waters.
To quantify krill biomass and distribution we used: an integrated MOCNESS [17] for estimates of krill size and acoustic target strength; dual EK - 60 fisheries echosounders (38 and 120 kHz, Kongsberg - Simrad) calibrated according to [18] and mounted on a zodiac for fine scale (100 km) measurements of acoustic volume backscattering; and the ADCP echo intensity to define the meso - scale (101 km) geographic extent of the krill distributions.
She has a PhD in acoustics from the University of Bergen, where she investigated broad band backscatter from fish without swim bladder.
The radar wind profiler / radio acoustic sounding system (RWP / RASS), available in 915 - MHz (for U.S. deployments) and 1290 - MHz (for foreign deployments), measures wind profiles and backscattered signal strength between (nominally) 0.1 km and 5 km and virtual temperature profiles between 0.1 km and 2.5 km.
It transmits acoustic energy into the atmosphere in multiple directions and measures the strength and frequency of backscattered energy.