Multibeam Sonar Theory of Operation

More documents

Recommendations

Info

Copyright © 2000 L-3 Communications SeaBeam Instruments Multibeam Sonar Theory of Operation No portion of this document may be reproduced without the expressed written permission of L-3 Communications SeaBeam Instruments
Multibeam Sonar Theory of Operation Table of Contents Table of Contents Chapter 1 - Introduction Organization of this Document....................................................................................................................................1-3 Scope of this Document................................................................................................................................................1-3 Chapter 2 - Sonar Concepts The Physics of Sound in Water...................................................................................................................................2-1 The Principles of Sonar.................................................................................................................................................2-3 The Sonar Equation...............................................................................................................................................2-5 A Single-Beam Depth Sounder....................................................................................................................................2-6 Why Multibeam? The Limitations of a Single-Beam Depth Sounder....................................................................2-8 Echo Location Questions – Where is the Bottom? ..........................................................................................2-8 Survey Speed........................................................................................................................................................2-12 The Multibeam Solution .....................................................................................................................................2-13 Chapter 3 - Introduction to Multibeam Sonar: Projector and Hydrophone Systems Projector Arrays and Beam Forming...........................................................................................................................3-1 Hydrophone Arrays ....................................................................................................................................................3-11 Beam Steering...............................................................................................................................................................3-15 The Mills Cross Technique........................................................................................................................................3-17 The Mills Cross Applied in the SEA BEAM 2100 System ....................................................................................3-20 The SEA BEAM 2100 Projector and Hydrophone Arrays ............................................................................3-20 SEA BEAM 2100 Beam Steering........................................................................................................................3-21 Chapter 4 - Detection Processing and Range Calculations Processing Steps............................................................................................................................................................4-1 The Steered Beam Data.................................................................................................................................................4-5 Dynamic Threshold Calculation ..................................................................................................................................4-6 Time of Arrival (TOA) and Direction of Arrival (DOA) Calculations: BDI and WMT Processing.................4-10 BDI Processing.....................................................................................................................................................4-11 High-Resolution Angle Estimation ...........................................................................................................4-11 Motion Compensation ................................................................................................................................4-12 Application of the Start and Stop Gates...................................................................................................4-16 Direction of Arrival (DOA) and Time of Arrival (TOA) Calculations..................................................4-17 WMT Processing.................................................................................................................................................4-19 Interpolating Amplitudes for Each Time Slice.........................................................................................4-20 Amplitude-Weighted Time of Arrival (TOA) Computation ..................................................................4-21 Copyright © 2000 L-3 Communications SeaBeam Instruments Page i No portion of this document may be reproduced without the expressed written permission of L-3 Communications SeaBeam Instruments
Page 1: Multibeam Sonar Theory of Operation
Page 5 and 6: Multibeam Sonar Theory of Operation
Page 25 and 26: Introduction to Multibeam Sonar: Mu
Page 53 and 54:
Detection Processing and Range Calc
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Sidescan Sonar Multibeam Sonar Theo
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Glossary of Terms Multibeam Sonar T
Page 103 and 104:
Page 105 and 106:
Page 107:
show all

Multibeam Sonar Theory of Operation

Create successful ePaper yourself

Delete template?

Save as template?