as.echosounder: Coerce Data into an Echosounder Object
In oce: Analysis of Oceanographic Data

Description Usage Arguments Details Value Author(s) See Also

View source: R/echosounder.R

Coerces a dataset into a echosounder dataset.

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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)

`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 at 1m), denoted `sl` in [1 p15], where it is in units 0.1dB (uPa at 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.

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

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

Dan Kelley