Detection of Near-earth Targets by Space-based Radar: PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
Describes a time-based computer simulation of a space-based radar (SBR) system. The simulator models the orbital dynamics of multiple radar satellites and the characteristics of the radar, and computes the clutter returns from the surface of the earth as a function of Doppler velocity. It then determines the theoretical detectability of a target of specified radar cross-section, location, and velocity at any given time. The simulator is used to carry out studies of the detection performance of a generic SBR system in a low-altitude polar orbit using near-earth targets in the presence of earth clutter. Results indicate the effects on detection performance of look direction and target latitude.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
Describes a time-based computer simulation of a space-based radar (SBR) system. The simulator models the orbital dynamics of multiple radar satellites and the characteristics of the radar, and computes the clutter returns from the surface of the earth as a function of Doppler velocity. It then determines the theoretical detectability of a target of specified radar cross-section, location, and velocity at any given time. The simulator is used to carry out studies of the detection performance of a generic SBR system in a low-altitude polar orbit using near-earth targets in the presence of earth clutter. Results indicate the effects on detection performance of look direction and target latitude.
Author: Ramaswamy Sridharan
Publisher: MIT Press
ISBN: 0262549956
Category : Technology & Engineering
Languages : en
Pages : 391
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Book Description
The development of deep space surveillance technology and its later application to near-Earth surveillance, covering work at Lincoln Laboratory from 1970 to 2000. In the 1950s, the United States and the Soviet Union raced to develop space-based intelligence gathering capability. The Soviets succeeded first, with SPUTNIK I in 1957. The United States began to monitor the growing Soviet space presence by developing technology for the detection and tracking of man-made resident space objects (RSOs) in near-Earth orbit. In 1972, the Soviet Union launched a satellite into deep space orbit, and the U.S. government called on MIT Lincoln Laboratory to develop deep space surveillance technology. This book describes these developments, as well as the later application of deep space surveillance technology to near-Earth surveillance, covering work at Lincoln Laboratory on space surveillance from 1970 to 2000. The contributors, all key participants in developing these technologies, discuss topics that include narrow beam, narrow bandwidth radar for deep surveillance; wide bandwidth radar for RSO monitoring; ground-based electro-optical deep space surveillance and its adaptation for space-based surveillance; radar as the means of real-time search and discovery techniques; methods of analyses of signature data from narrow bandwidth radars; and the collision hazard for satellites in geosynchronous orbit, stemming initially from the failure of TELSTAR 401. They also describe some unintended byproducts of this pioneering work, including the use of optical space surveillance techniques for near-Earth asteroid detection. Contributors Rick Abbott, Robert Bergemann, E.M. Gaposchkin, Israel Kupiec, Richard Lambour, Antonio F. Pensa, Eugene Rork, Jayant Sharma, Craig Solodyna, Ramaswamy Sridharan, J. Scott Stuart, George Zollinger
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309149681
Category : Science
Languages : en
Pages : 152
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Book Description
The United States spends approximately $4 million each year searching for near-Earth objects (NEOs). The objective is to detect those that may collide with Earth. The majority of this funding supports the operation of several observatories that scan the sky searching for NEOs. This, however, is insufficient in detecting the majority of NEOs that may present a tangible threat to humanity. A significantly smaller amount of funding supports ways to protect the Earth from such a potential collision or "mitigation." In 2005, a Congressional mandate called for NASA to detect 90 percent of NEOs with diameters of 140 meters of greater by 2020. Defending Planet Earth: Near-Earth Object Surveys and Hazard Mitigation Strategies identifies the need for detection of objects as small as 30 to 50 meters as these can be highly destructive. The book explores four main types of mitigation including civil defense, "slow push" or "pull" methods, kinetic impactors and nuclear explosions. It also asserts that responding effectively to hazards posed by NEOs requires national and international cooperation. Defending Planet Earth: Near-Earth Object Surveys and Hazard Mitigation Strategies is a useful guide for scientists, astronomers, policy makers and engineers.
Author: Joseph A. Post
Publisher:
ISBN:
Category : Astronautics, Military
Languages : en
Pages : 92
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Book Description
"DoD's 2006 Quadrennial Defense Review calls for investment in such systems to grow in order to provide 'a highly persistent capability to identify and track moving ground targets in denied areas.' To that end, DoD and the National Reconnaissance Office are proposing to develop a constellation of Earth-orbiting Space Radar satellites that would provide imagery, GMTI, and geospatial intelligence products to members of the military and the intelligence community. This Congressional Budget Office (CBO) study--prepared at the request of Senators Wayne Allard and Bill Nelson in their respective capacities as the Chairman and Ranking Member of the Senate Committee on Armed Services' Subcommittee on Strategic Forces--examines the costs and potential performance of four possible designs for a Space Radar system."--Preface.
Author: S Unnikrishna Pillai
Publisher: McGraw Hill Professional
ISBN: 0071595929
Category : Technology & Engineering
Languages : en
Pages : 450
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Book Description
The First Comprehensive Guide to the Principles, Design Methods, and Applications of Space Based Radar Turn to Space Based Radar for authoritative information on the latest developments in Space Based Radar (SBR), covering fundamental principles, cutting-edge design methods, and several new applications. This SBR guide focuses on clutter and target data generation from an SBR platform, and on Space Time Adaptive Processing (STAP) to enhance the target detection and the clutter cancellation capabilities of the radar system. Designed to save you hours of research time and effort, this one-stop resource explores the full range of SBR topics, including SBR footprint and range foldover phenomenon...Doppler shift that accounts for Earth's rotation...terrain modeling...STAP algorithms for enhanced target detection...and much more. Packed with over 250 full-color illustrations, Space Based Radar features: Complete coverage of the technical issues associated with SBR and their impact on system performance A CD containing all of the book's illustrations, equations, and samples; plus more than 250 PowerPoint slides for self-study or lectures Inside This Pioneering SBR Sourcebook • Introducing Space Based Radar • The Conics • Two Body Orbital Motion and Kepler's Laws • SBR Kinematics • Space Time Adaptive Processing for Space Based Radar • Performance Analysis Using Cramer-Rao Bounds • Waveform Diversity
Author: W. A. Ricks
Publisher:
ISBN: 9781423562542
Category :
Languages : en
Pages : 69
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Book Description
Since the U.S. does not have the largest military force in the world, it relies on force multipliers to achieve victory. One of these force multipliers is stealth technology. However, when stealth technology is used in modern military aircraft, usually only the forward sector of the aircraft is treated and/or shaped. This forward sector treatment is effective against static, ground based radars. However, the aircraft may be very susceptible to a look-down type of radar. This thesis addresses the viability of using space- based radar to detect stealth aircraft. Many papers have been written on how to use space-based radar to detect and track targets. However, these papers neglect to develop the satellite constellation that would be necessary to provide continuous radar coverage. These papers also do not address how susceptible stealth aircraft would be to space-based radar. The approach of this thesis was to select a target area, in this case Iraq, and develop two satellite constellations that could provide the required radar coverage. The next step was to determine if the system would be able to detect and track stealth targets. Based on the analysis, one satellite in geosynchronous orbit can detect stealth aircraft. However, because the satellite is 35,786 km away, the power requirements, as well as the spot size are too large to track stealth aircraft. On the other hand, a constellation of 32 satellites in low earth orbit (1000 km) can both detect and track stealth aircraft. In conclusion, if the U.S. does not start applying stealth technology to the upper surface of stealth aircraft, they will be susceptible to space-based radar.
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309373085
Category : Science
Languages : en
Pages : 254
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Book Description
Active remote sensing is the principal tool used to study and to predict short- and long-term changes in the environment of Earth - the atmosphere, the oceans and the land surfaces - as well as the near space environment of Earth. All of these measurements are essential to understanding terrestrial weather, climate change, space weather hazards, and threats from asteroids. Active remote sensing measurements are of inestimable benefit to society, as we pursue the development of a technological civilization that is economically viable, and seek to maintain the quality of our life. A Strategy for Active Remote Sensing Amid Increased Demand for Spectrum describes the threats, both current and future, to the effective use of the electromagnetic spectrum required for active remote sensing. This report offers specific recommendations for protecting and making effective use of the spectrum required for active remote sensing.
Author:
Publisher:
ISBN:
Category : Antennas (Electronics)
Languages : en
Pages : 624
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Book Description
Author: Cale M. Gillen
Publisher:
ISBN: 9781607414858
Category : Astronautics, Military
Languages : en
Pages : 0
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Book Description
The Department of Defense (DoD) and the intelligence community rely on various systems to provide imagery to tactical commanders and intelligence analysts. In addition DoD uses manned and unmanned aircraft equipped with ground moving-target indication (GMTI) radars to detect military units, vehicles, and other moving targets on the ground and inform commanders of their disposition. This book examines the costs and potential performance of four possible designs for a Space Radar System. Those four notional alternatives include three constellations of various sizes with 40-square meter radar arrays and one constellation with 100-square-meter radar arrays, all in low earth orbit. The book also highlights some of the technological challenges associated with developing and operating Space Radar satellites. This is an edited, excerpted and augmented edition combining CBO and GAO publications.
Author: Mike Golio
Publisher: CRC Press
ISBN: 1420006711
Category : Technology & Engineering
Languages : en
Pages : 690
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Book Description
This volume, RF and Microwave Applications and Systems, includes a wide range of articles that discuss RF and microwave systems used for communication and radar and heating applications. Commercial, avionics, medical, and military applications are addressed. An overview of commercial communications systems is provided. Past, current, and emerging cellular systems, navigation systems, and satellite-based systems are discussed. Specific voice and data commercial systems are investigated more thoroughly in individual chapters that follow. Detailed discussions of military electronics, avionics, and radar (both military and automotive) are provided in separate chapters. A chapter focusing on FR/microwave energy used for therapeutic medicine is also provided. Systems considerations including thermal, mechanical, reliability, power management, and safety are discussed in separate chapters. Engineering processes are also explored in articles about corporate initiatives, cost modeling, and design reviews. The book closes with a discussion of the underlying physics of electromagnetic propagation and interference. In addition to new chapters on WiMAX and broadband cable, nearly every existing chapter features extensive updates and several were completely rewritten to reflect the massive changes areas such as radio navigation and electronic warfare.
