Target strength

Sonar image of the wreck of USS O-9.

The target strength or acoustic size is a measure of the reflection coefficient of a sonar target. This is usually quantified as a number of negative decibels. For fish such as salmon, the target size varies with the length of the fish and a 5 cm fish would have a target size of about -50 db.[1]

Target strength (TS) is equal to 10 log10(σbs), where σbs is the backscattering cross section.

References

  1. J.E. Ehrenberg (1989), "A review of target estimation techniques", Underwater Acoustic Data Processing, Springer

Further reading


target strength formula:

TS=10log((R^2)/4) FOR Circular

TS=10log((RL^2)/(2*landa)*(SIN(B)/B)^2*COS(U)^2) B=KL*SIN(U) K=2pi/landa

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