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Ultra-Wideband Surveillance Radar is an emerging technology for
detecting and characterizing targets and cultural features for
military and geosciences applications. To characterize objects near
and under severe clutter, it is necessary to have fine range and
cross range resolution. The resultant wide bandwidth classifies the
systems as ultra-wideband, requiring special treatment in system
technology and frequency allocation. This book explores several UWB
surveillance radar prototypes, including Hostile Weapons Locator
System (HOWLS), Multibeam Modular Surveillance Radar (MMSR), and
geoscience synthetic aperture radar (GeoSAR). These prototype
radars illustrated the early development of multi-mode capabilities
leading to modern radar systems. Based on the results of these
prototypes and recent radar technology publications a novel
multi-mode, multi-channel radar is presented and analysed. The book
begins with a history of airborne surveillance radar, then goes on
to provide systematic and detailed coverage of the following topics
and technologies: surveillance radar detection; surveillance radar
modes; UWB antennas; ultra-Wideband SAR processing; interferometric
radar modes; UWB ground moving target detection; UWB spectrum
compliance; and UWB multimode operation. The first book to cover
these new capabilities, this is an important reference for radar
engineers, especially those working in geosciences and military
applications. It is also relevant to academic and advanced
engineering researchers developing new radar technologies and
algorithms for image processing, as well as the advanced
electromagnetics research community.
This book covers all aspects of foliage penetration (FOPEN) radar,
concentrating on both airborne military radar systems as well as
earth resource mapping radars. It is the first concise and thorough
treatment of FOPEN, covering the results of a decade-long
investment by DARPA in characterizing foliage and earth surface
with ultrawideband UHF and VHF synthetic aperture radar (SAR).
Comparisons of the technologies for radar design and signal
processing are presented, as are specific design approaches for
transmitter design for operation in a dense radio frequency
spectrum. Adaptive processing to remove the effects of radio and
television signals from the system are also covered. In 10 years,
FOPEN systems will find use in crop monitoring, land mine
remediation, and creating digital maps under trees. This book will
be the foundation for continued research for years to come both for
radar and systems engineers in defense and earth resources
companies. Government researchers, program managers and planners
who have an interest in the unique capabilities of this radar
technology, as well as university staff and faculty teaching radar
and signal processing will find this book a critical part of their
learning for years to come.
Advances in Bistatic Radar updates and extends bistatic and
multistatic radar developments since the publication of Willis'
Bistatic Radar in 1991. New and recently declassified military
applications are documented, civil applications are detailed
including commercial and scientific systems and leading radar
engineers provide expertise to each of these applications. Advances
in Bistatic Radar consists of two major sections:
Bistatic/Multistatic Radar Systems and Bistatic Clutter and Signal
Processing. Starting with a history update, the first section
documents the early and now declassified military AN/FPS-23 Fluttar
DEW-Line Gap-filler, and high frequency (HF) bistatic radars
developed for missile attack warning. It then documents the
recently developed passive bistatic and multistatic radars
exploiting commercial broadcast transmitters for military and
civilian air surveillance. Next, the section documents scientific
bistatic radar systems for planetary exploration, which have
exploited data link transmitters over the last forty years;
ionospheric measurements, again exploiting commercial broadcast
transmitters; and 3-D wind field measurements using a bistatic
receiver hitchhiking off doppler weather radars. This last
application has been commercialized. The second section starts by
documenting the full, unclassified bistatic clutter scattering
coefficient data base, along with the theory and analysis
supporting its development. The section then details two major
clutter-related developments, spotlight bistatic synthetic aperture
radar (SAR), which can now generate high resolution images using
bistatic autofocus and related techniques; and adaptive moving
target indication (MTI), which allows cancellation of nonstationary
clutter generated by moving (i.e. airborne) platforms through the
use of bistatic space-time adaptive processing (STAP).
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