On the Choice of Beam Spacing in Rotational Directional Transmission
CONTROL DATA CORP MELVILLE NY TRG DIV
Pagination or Media Count:
A possible method of insonifying a large sector with a Conformal Planar sonar is the use of rotational directional transmission. This technique consists of sequentially transmitting in contiguous beams. An alternate method of insonification consists of defocusing the beams and transmitting long coded pulses. the use of coding is necessary to maintain the desired transmitted bandwidth. This latter method was not judged as desirable as the first because of the possible signal processing losses due to the medium and own ships motion, as well as possible difficulties associated with driving the elements. Furthermore, the increased system costs associated with the additional signal processing equipment decrease the attractiveness of the beam broadening approach.
- Acoustic Detection and Detectors