Expands the background noise into a matrix corresponding to the dimension of the data.

1 | ```
echoIBM.bgns(data, TVG = FALSE, TVG.exp = 2)
``` |

`data` |
is a list containing beam configuration, and periodic noise parameters. Speficically the following variables must be included: Beams variables: 'sint', 'lenb'; periodic noise variables: 'pns1', 'pns2', 'pns3', 'acfq', 'harm'; and either 'bgns' or 'numb' |

`TVG` |
is TRUE if TVG should be added to the periodic noise. |

`TVG.exp` |
is the exponent of the eamotric spreading of the sound wave, theoretically 2 for Sv and 4 for TS. |

arnejohannesholmin/echoIBM documentation built on March 19, 2018, 9:16 a.m.

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