oce (version 0.9-18)

as.echosounder: Coerce data into echosounder dataset

Description

Coerces a dataset into a echosounder dataset.

Usage

as.echosounder(time, depth, a, src="",
               sourceLevel=220,
               receiverSensitivity=-55.4,
               transmitPower=0,
               pulseDuration=400,
               beamwidthX=6.5, beamwidthY=6.5,
               frequency=41800,
               correction=0)

Arguments

time

times of pings

depth

depths of samples within pings

a

matrix of amplitudes

src

optional string indicating data source

sourceLevel

source level, in dB(uPa@1m), denoted sl in [1 p15], where it is in units 0.1dB(uPa@1m)

receiverSensitivity

receiver sensivity of the main element, in dB(counts/uPa), denoted rs in [1 p15], where it is in units of 0.1dB(counts/uPa)

transmitPower

transmit power reduction factor, in dB, denoted tpow in [1 p10], where it is in units 0.1 dB.

pulseDuration

duration of transmited pulse in us

beamwidthX

x-axis -3dB one-way beamwidth in deg, denoted bwx in [1 p16], where the unit is 0.2 deg

beamwidthY

y-axis -3dB one-way beamwidth in deg, denoted bwx in [1 p16], where the unit is 0.2 deg

frequency

transducer frequency in Hz, denoted fq in [1 p16]

correction

user-defined calibration correction in dB, denoted corr in [1 p14], where the unit is 0.01dB.

Value

• An object of class "echosounder"; for details of this data type, see echosounder-class).

Details

Creates an echosounder file. The defaults for e.g. transmitPower are taken from the echosounder dataset, and they are unlikely to make sense generally.

See Also

The documentation for echosounder-class explains the structure of echosounder objects, and also outlines the other functions dealing with them.