R: Coerce Data into an Echosounder Object

as.echosounder {oce}

R Documentation

Coerce Data into an Echosounder Object

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 at 1m), denoted `sl` in reference 1 p15, where it is in units 0.1dB (uPa at 1m)
`receiverSensitivity`	receiver sensitivity of the main element, in dB(counts/uPa), denoted `rs` in reference 1 p15, where it is in units of 0.1dB(counts/uPa)
`transmitPower`	transmit power reduction factor, in dB, denoted `tpow` in reference 1 p10, where it is in units 0.1 dB.
`pulseDuration`	duration of transmitted pulse in us
`beamwidthX`	x-axis -3dB one-way beamwidth in deg, denoted `bwx` in reference 1 p16, where the unit is 0.2 deg
`beamwidthY`	y-axis -3dB one-way beamwidth in deg, denoted `bwx` in reference 1 p16, where the unit is 0.2 deg
`frequency`	transducer frequency in Hz, denoted `fq` in reference 1 p16
`correction`	user-defined calibration correction in dB, denoted `corr` in reference 1 p14, where the unit is 0.01dB.

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.

Value

An echosounder object.

Author(s)

Dan Kelley