Array Radar

Array Radar

Using Radar as a Fish Finder

Its no great secret that if you want to catch fish you need to know how to find them. One of the quickest ways of finding fish is to locate the birds – the undeniable masterminds of fish finding technology. What is a closely guarded secret is how to go about targeting these birds by using your Radar, a tool normally reserved for collision avoidance. This month we will remove some of the mystery surrounding the subject.

At first sight, a radar picture seems to just be a mass of blobs. The general shapes of coastlines are usually easy to pick out, but some of the details, along with ships, boats, and buoys are harder to identify. To understand what the radar is seeing, we need to recognize that the radar picture isn't a map; it's a diagram showing the range and bearing of echoes. Radar works just like an echo sounder it transmits short pulses of energy and listens for the echoes produced when the pulses are reflected from something in their path. Of course, there are significant differences between a radar and echo sounder. One is that radar sweeps its beam of pulses around the horizon like the beam of a lighthouse, instead of sending them all downwards. Another is that it uses super high frequency radio waves – microwaves – rather than sound waves.

Your radars beam width is going to play a big part in its ability to effectively track feeding birds. Remember that the narrower the beam width, the greater target discrimination you will have. As the length of the antenna radiator increases the beam width becomes narrower, so a larger antenna will invariably offer better target identification. For this reason, dome antennas are not as proficient at tracking birds as a comparable open array antenna.

There is simply no replacement for experience and practice when it comes to becoming a skilled radar operator, however, to get there you need to start with the basics. For the best results it is best to practice these techniques on a clear day with calm seas. It is easiest to first visually locate a flock of birds that you want to target.

Targeting Birds

To begin targeting the birds, set your Radar to a mid or long-range. Next, increase the Gain control until you see noise on the display. This will appear as a blanket of small specks. You will need to leave the Gain turned all the way up, thus setting the receiver for maximum sensitivity in order to detect birds. Resist the temptation to turn up the AC/Sea or AC/Rain to drop out the noise. Flocks of birds may look like dense, recurring noise rather than a solid target, but you should be able to see them clearly. This is what you will be looking for when you don't have a visual cue as to where the birds are feeding.

If your Radar is capable of operating in True Motion, select this setting. You will be stabilizing the display, and be able to tell if the flock is travelling in a straight line looking for bait pods or if they have found their target school and are feeding.

When operating in Head Up or True Motion, be sure to turn on your target trail function and set it for long trails to help track-travelling flocks.

Practice these techniques and soon you will be scouting your fishing spots just like the pros.

About the Author

Captain Bob Figular, President and Founder of Mariners Learning System is and avid Boater and Sailor who has cruised the world chasing his dreams.

Multifunction Array Radar $165.35 This definitive book supplies the information needed to specify and design a multifunction array radar system. With minimal mathematics, the book shows how radars smaller in aperture and power can meet demands formerly conceived for the larger rotating and phased array radars. Author: Billetter, Dale R. Series Title: Artech House Radar Library (Hardcover) Binding Type: Hardcover Number of Pages: 216 Publication Date: 1989/07/01 Language: English Dimensions: 9.34 x 6.24 x 0.67 inches

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Array Processing: Applications to Radar $55.09 No Synopsis Available

Radar Handbook $110.01 The Industry Standard in Radar Technology_Now Updated with All the Advances and Trends of the Past 17 Years Turn to the Third Edition of "Radar Handbook" for state-of-the-art coverage of the entire field of radar technology_from fundamentals to the newest applications. With contributions by 30 world experts, this resource examines methods for predicting radar range and explores radar subsystems such as receivers, transmitters, antennas, data processing, ECCM, and pulse compression. This radar handbook also explains the target cross section...radar echoes from ground and sea...and all radar systems, including MTI, AMTI, pulse doppler, and others. Using SI units, the Third Edition of "Radar Handbook" features: Unsurpassed guidance on radar fundamentals, theory, and applications Hundreds of examples and illustrations New to this edition: new chapters on radar digital signal processing, radar in air traffic control, ground penetrating radar, fighter aircraft radar, and civil marine radar; 22 thoroughly revised chapters; 17 new contributors Inside This Cutting-Edge Radar Guide - MTI Radar - Pulse Doppler Radar - Multifunctional Radar Systems for Fighter Aircraft - Radar Receivers - Automatic Detection, Tracking, and Sensor Integration - Pulse Compression Radar - Radar Transmitters - Reflector Antennas - Phased Array Radar Antennas - Radar Cross Section - Sea Clutter - Ground Echo - Space-Based Radar - Meteorological Radar - HF Over-the-Horizon Radar - Ground Penetrating Radar - Civil Marine Radar - Bistatic Radar - Radar Digital Signal Processing - And More

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Multifunction Array Radar: System Design and Analysis $136.47 This book details the advantages of MFAR main parameter design and guides you through parameter and performance evaluation procedures. It presents practical design information on combinations of various radar functions, clutter conditions, multipath, and transmitted waveform design when Doppler filters adapted for clutter cancellation.

Radar Techniques Using Array Antennas (FEE Radar, Sonar, Navigation & Avionics Series) $118 This book gives an introduction to the possibilities of radar technology based on active array antennas, giving examples of modern practical systems, many of which were developed in Europe. In addition to coverage of antennas, array signal processing, adaptive digital beamforming, adaptive monopulse, superresolution, and sequential detection, several modern systems are described including space-time adaptive processing (STAP), moving target detection using synthetic aperture radar (SAR), and several other experimental phased array radar systems. There are many valuable lessons presented for designers of future high standard multifunction radar systems for military and civil applications. The book will appeal to graduate level engineers, researchers, and managers in the field of radar, aviation and space technology.

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Wireless, Networking, Radar, Sensor Array Processing, and Nonlinear Signal Processing $99.95 Offers coverage of the foundations of signal processing related to wireless, radar, space - time coding, and mobile communications, together with associated applications to networking, storage, and communications.

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Array and Phased Array Antenna Basics $150 Reflecting a growing interest in phased array antenna systems, stemming from radar, radio astronomy, mobile communications and satellite broadcasting, Array and Phased Array Antenna Basics introduces the principles of array and phased array antennas. Packed with first-hand practical experience and worked-out examples, this is a valuable learning tool and reference source for those wishing to improve their understanding of basic array antenna systems without relying heavily on a thorough knowledge of electromagnetics or antenna theory. Features a general introduction to antennas and explains the array antenna principle through discussion of the physical characteristics rather than the theory Explores topics often not covered in antenna textbooks, such as active element pattern, array feeding, means of phase changing, array antenna characterisation, sequential rotation techniques and reactively loaded arrays Guides the reader through the necessary mathematics, allowing them to move onto specialist books on array and phased array antennas with a greater understanding of the topic Supported by a companion website on which instructors and lecturers can find electronic versions of the figures An ideal introduction for those without a background in antennas, this clear, concise volume will appeal to technicians, researchers and managers working in academia, government, telecommunications and radio astronomy. It will also be a valuable resource for professionals and postgraduates with some antenna knowledge.

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Evaluation of the Multifunction Phased Array Radar Planning Process $24.38 No Synopsis Available

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Phased Array Antenna Handbook $198.99 Phased Arrays in Radar and Communication Systems. Pattern characteristics and Synthesis of Linear and Planar Arrays. Patterns of Nonplanar Arrays, Elements, Transmission Lines, and Feed Architectures for Phased Arrays. Summary of Element Pattern and Mutual Impedance Effects. Array Error Effects. Special Array Feeds for Limited Field of View and Wideband Arrays.

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Through-The-Wall Radar Imaging $173.01 As the first book on through wall radar imaging, this text examines an emerging and important area of research and technology, appealing to both engineers and scientists. It offers theory, analyses, and experimentations and covers key research and development efforts in signal processing, array processing, EM modeling, antenna design, SAR, Doppler signature estimation, polar difference imaging and more. This book provides research findings, including real solutions to real problems. It also shows the impact of various types of walls on image resolution and quality and explores the various approaches to remove these effects.

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Phased Array Antennas $156 An in-depth treatment of array phenomena and all aspects of phased array analysis and design Phased Array Antennas, Second Edition is a comprehensive reference on the vastly evolving field of array antennas. The Second Edition continues to provide an in-depth evaluation of array phenomena with a new emphasis on developments that have occurred in the field over the past decade. The book offers the same detailed coverage of all practical and theoretical aspects of phased arrays as the first edition, but it now includes: New chapters on array-fed reflector antennas; connected arrays; and reflect arrays and retrodirective arrays Brand-new coverage of artificial magnetic conductors, and Bode matching limitations A clear explanation of the common misunderstanding of scan element pattern measurement, along with appropriate equations In-depth coverage of finite array Gibbsian models, photonic feeding and time delay, waveguide simulators, and beam orthogonality The book is complemented with a multitude of original curves and tables that illustrate how particular behaviors were derived from the author's hundreds of programs developed over the past forty years. Additionally, numerous computer design algorithms and numerical tips are included throughout the book to help aid in readers' comprehension. Phased Array Antennas, Second Editio n is an ideal resource for antenna design engineers, radar engineers, PCS engineers, and communications engineers, or any professional who works to develop radar and telecommunications systems. It also serves as a valuable textbook for courses in phased array design and theory at the upper-undergraduate and graduate levels.

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