Is my Sv data affected?

No

These data have TVG range correction settings in Echoview.

Simrad Ex60 data (raw).

Simrad Ex60 data logged to Ex500 format: W datagrams.

Simrad Ex500 data (all Ex500 firmware versions): W datagrams.

Simrad ME70 data

Simrad EK80 data

Biosonics+ .DT4 files and Model 102 files.

Sonic+ KFC series and KFS echosounders.

+The TVG range correction settings for these echosounders were introduced in Echoview 4.40. Prior to Echoview 4.40, the Biosonics Sv data and Sonic Sv data was affected.


These data have embedded TVG range correction.

Simrad Ex500 data (Ex500 firmware V5.30 and later): V, P, Q datagrams.

Simrad Ex60 data logged to Ex500 format: V, Q datagrams.

HAC and text data files.

This is dependent on the original data source and whether the correct TVG range correction was applied.

Yes

These data have no TVG range correction settings in Echoview.

Simrad Ex60 data logged to Ex500 format: P datagrams.

Simrad Ex500 data (Ex500 firmware V5.20 and earlier): V, P, Q datagrams.

Furuno FQ80 and ETR-30N echosounders.

Notes:

  • Echoview implements the equation for Sv that is supplied by the echosounder manufacturer.
  • Brief descriptions for datagram types are given on data file format specific Calibration pages.

Return to TVG range correction overview

See also

About time varied gain