Specifications

Channel Master Operation Manual
page 148 Teledyne RD Instruments
7. Salinity: generally, the fresher the water, the longer the
range.
Range Gating: After sending a ping into the water, the ADCP transducers
listen for returned signal. The time series of the returned signal is then bro-
ken into a sequence of time segments, or range gates. Each segment is
equivalent to a depth cell, with the last segment coming from the farthest
range 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 out
of range, the vessel motion can be approximated by assuming the water is
motionless at some point in the measured profile. This point is the refer-
ence layer.
Remotely Operated Vehicle (ROV): unmanned submersible controlled by
an operator via a tethering cable.
Ringing: After transmission the ADCP electronics, transducer and immedi-
ate surrounding equipment (particularly in vessel mounted ADCPs) all re-
quire some finite time to dampen the transmit energy, during which time
any signal return from scatterers will be contaminated.
Rio Grande ADCP: The model name for an ADCP optimally configured
for measurement of river discharge. A distinguishing feature of Rio Grande
ADCPs 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 research
vessels. Rosettes are designed to be lowered to depths of interest while col-
lecting data of various types. Most Lowered-ADCPs are mounted on ro-
settes.
ROV: R
emotely Operated Vehicle
------ S ------
Scatterers: Small particles or plankton in the water which reflect sound
waves.
Sea Chest: Cavity in the hull of a vessel to allow stream-lined, recessed
mounting of equipment such as a Vessel Mount ADCP.
Sediview: Third party software designed to use ADCP echo intensity meas-
urements and in situ sampling to obtain quantitative estimates of sediment
concentration.
Self-Contained ADCP: An ADCP equipped with internal batteries and an
internal recorder for autonomous operation.