StreamPro ADCP Operation Manual - global site

StreamPro ADCP Operation Manual6. Temperature: generally, the colder the water, the longer therange.7. Salinity: generally, the fresher the water, the longer therange.Range Gating: After sending a ping into the water, the ADCP transducerslisten for returned signal. The time series of the returned signal is then brokeninto a sequence of time segments, or range gates. Each segment isequivalent to a depth cell, with the last segment coming from the farthestrange from the ADCP.RDI Tools: Software package containing all of the BB* programs (BBTalk,BBList, etc.) as well as several commonly used decoder files.Reference Layer: In moving platform applications where the bottom is outof range, the vessel motion can be approximated by assuming the water ismotionless at some point in the measured profile. This point is the referencelayer.Remotely Operated Vehicle (ROV): unmanned submersible controlled byan operator via a tethering cable.Ringing: After transmission the ADCP electronics, transducer and immediatesurrounding equipment (particularly in vessel mounted ADCPs) all requiresome finite time to dampen the transmit energy, during which timeany signal return from scatterers will be contaminated.Rio Grande ADCP: The model name for an ADCP optimally configuredfor measurement of river discharge. A distinguishing feature of Rio GrandeADCPs is that they are designed to operate from a 12 VDC power supply(all other ADCPs operate from 20 – 50 VDC).Rosette: Oceanographic instrumentation package found on most researchvessels. Rosettes are designed to be lowered to depths of interest while collectingdata of various types. Most Lowered-ADCPs are mounted on rosettes.ROV: Remotely Operated Vehicle------ S ------Scatterers: Small particles or plankton in the water which reflect soundwaves.Sea Chest: Cavity in the hull of a vessel to allow stream-lined, recessedmounting of equipment such as a Vessel Mount ADCP.Sediview: Third party software designed to use ADCP echo intensity measurementsand in situ sampling to obtain quantitative estimates of sedimentconcentration.page 108Teledyne RD Instruments