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2003 Proceedings of the International Conference on Radar (IEEE Cat. No.03EX695)

3-5 Sept. 2003

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Displaying Results 1 - 25 of 131
  • Mesospheric and lower thermospheric observations using the Buckland Park medium frequency radar

    Publication Year: 2003, Page(s):276 - 281
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB) | HTML iconHTML

    This paper describes the analysis techniques employed for atmospheric observations using medium (MF) and high frequency (HF) radars, focusing on the current routine observations scheme implemented for the Buckland Park medium frequency (BPMF) radar. These observations are rare among current routine MF/HF radar observations in that they are made using a relatively narrow transmit polar diagram. The... View full abstract»

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  • Meteorological applications of radar wind profilers

    Publication Year: 2003, Page(s):270 - 275
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (433 KB) | HTML iconHTML

    An overview of the meteorological applications of wind profilers is given, focusing on the VHF boundary-layer wind profiler developed at the University of Adelaide. Discussion is centered on: (1) a comparison of signal-to-noise ratio plots and their meteorological interpretation; (2) the discussion of a wind profiler front-finding algorithm and the characteristics of profiler detected fronts; and ... View full abstract»

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  • Probing of the artificial hole in the ionosphere with the HF skywave radar

    Publication Year: 2003, Page(s):588 - 592
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    This paper explains the experiment in which HF skywave radar probed the artificial ionospheric hole, which is caused by the flames of the rocket vertically launched and penetrated the ionosphere. After the rocket had passed through the ionosphere, the minimum time-delay Pmin-f on the backscatter ionograms obviously appeared with wave and focusing stripes resulting from the irregular str... View full abstract»

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  • L-band VV clutter analysis for natural land

    Publication Year: 2003, Page(s):625 - 630
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (651 KB) | HTML iconHTML

    Land clutter is statistical by nature, and its values vary in many dimensions. This paper analyzes L-band VV polarized land clutter characteristics acquired by the NASA JPL AirSAR system. In particular, this paper mainly concentrates on the distribution of clutter values with respect to grazing angle for typical vegetation communities in the Northern Territory region in Australia. View full abstract»

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  • Atmospheric radar for the 0.5-110 km region

    Publication Year: 2003, Page(s):264 - 269
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (635 KB) | HTML iconHTML

    Radar can be used to make measurements of the dynamics and structure of the atmosphere by detecting irregularities in refractive index due to variations in humidity and temperature in the lower atmosphere (0-20 km), and due to variations due to fluctuations in electron density in the mesosphere lower thermosphere (MELT) region of the upper atmosphere (50-110 km). MF and HF radars have been used to... View full abstract»

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  • Ship echo discrimination in HF radar sea-clutter

    Publication Year: 2003, Page(s):584 - 587
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (319 KB) | HTML iconHTML

    HF radar can provide over the horizon detection of ships on very large oceanic areas. Normally, the Doppler shift produces by ships is small, of the same order of magnitude as the Doppler shift of the sea clutter. Consequently, it is not always easy to discriminate a ship line from a sea clutter line. In this paper the coherence of sea clutter is considered in the context of a radar interferometer... View full abstract»

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  • Deinterleaving of radar pulses in a dense emitter environment

    Publication Year: 2003, Page(s):389 - 393
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (386 KB) | HTML iconHTML

    An ESM system consists of a passive radar receiver that receives pulses from the surrounding radars and measures their monopulse parameters, and a deinterleaver that sorts the digital words representing the parameters of theses pulses and groups them in individual radar cells. The parameters of the deinterleaved radar cells are then compared with those of known radars to identify the intercepted r... View full abstract»

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  • Radar the next generation - sensors as robots

    Publication Year: 2003, Page(s):8 - 14
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (633 KB) | HTML iconHTML

    One can easily envisage future military operations and emerging civilian requirements (e.g. intelligent unmanned vehicles for urban warfare, intelligent manufacturing plants) that will be both complex and stressing and will demand innovative sensors and sensor configurations. The goal of our research into sensors as robots is to develop a cost effective and extendable approach for providing survei... View full abstract»

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  • Clutter simulation in maritime environments

    Publication Year: 2003, Page(s):619 - 624
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (711 KB) | HTML iconHTML

    Knowledge of clutter characteristics are an important factor in determining radar system performance, especially for target detection. Clutter may be modelled as a random process, with the clutter characteristics embodied in the statistics of the process. Most modern pulsed-Doppler radars utilize range-Doppler maps in their detection schemes, and so it is crucial to understand the statistical prop... View full abstract»

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  • Improving the radar target classification results by decision fusion

    Publication Year: 2003, Page(s):162 - 165
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (338 KB) | HTML iconHTML

    The need for decision fusion appears when the classification results obtained using only one target signature are poor and have to be improved. Our idea was to use four target signatures corresponding to various polarization combinations in order to make the final decision more robust and more effective. The fusion method is based on the Sugeno's fuzzy integral and has some important advantages ov... View full abstract»

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  • Multiple reflectivities estimation for multibaseline InSAR imaging of layover extended sources

    Publication Year: 2003, Page(s):257 - 263
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB) | HTML iconHTML

    In this paper, the problem of retrieving radar reflectivity of natural layover areas is addressed. It is formulated as the problem of estimating a multicomponent sinusoidal spatial signal corrupted by multiplicative complex correlated noise - the speckle in the radar imaging jargon - and by additive white Gaussian noise. Application of nonparametric adaptive and parametric spectral estimators for ... View full abstract»

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  • Experimental results on marine targets classification with surveillance HRR by means of non coherent techniques based on hot spots accurate location

    Publication Year: 2003, Page(s):333 - 338
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB) | HTML iconHTML

    In this article, the experimental results are presented of applying a new non coherent and non statistic technique that allows us to endow the coastal surveillance high resolution radars (HRR) with a significant capacity for target classification and identification; making possible the estimation of their size, and also obtaining information about their structure by analyzing the intensity and pos... View full abstract»

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  • Multifunction radar resource management using tracking optimisation

    Publication Year: 2003, Page(s):578 - 583
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (597 KB) | HTML iconHTML

    In this paper we report on the relationship between track update intervals and track accuracy in a multifunction phased array radar system. Strategies for selecting the update rate are highlighted and the degradation of performance as update rate reduces is demonstrated. It is shown that using suitable techniques, considerable radar resources can be liberated for non-tracking tasks. View full abstract»

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  • Integrated maritime surveillance: protecting national sovereignty

    Publication Year: 2003, Page(s):385 - 388
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB) | HTML iconHTML

    Protection of national sovereignty requires the ongoing, systematic collection of data from a range of sensors and other sources and the assembly and maintenance of a picture of the position, classification, identification and movement of cooperative and non-cooperative ships, aircraft and hazards in the exclusive economic zone. Integrated maritime surveillance maintains a continuous and affordabl... View full abstract»

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  • Backscatter ionogram inversion

    Publication Year: 2003, Page(s):368 - 374
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB) | HTML iconHTML

    A backscatter ionogram, BSI, is a plot showing the group path or time delay against operating frequency when using ground-based swept frequency radar. In the case of ground backscatter, the received signals are reflected from distant locations on the Earth's surface. The ionosphere is the medium through which both the transmitted and received signals traverse. A backscatter ionogram contains usefu... View full abstract»

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  • From a different perspective: principles, practice and potential of bistatic radar

    Publication Year: 2003, Page(s):1 - 7
    Cited by:  Papers (42)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB) | HTML iconHTML

    Bistatic radar systems have been studied and built since the earliest days of radar. They have the advantages that the receivers are passive, and hence undetectable. The receiving systems are also potentially simple and cheap. Bistatic radar may have a counter-stealth capability, since target shaping to reduce monostatic RCS will in general not reduce the bistatic RCS. In spite of those advantages... View full abstract»

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  • Adaptive modelling of sea clutter and detection of small targets in heavy clutter

    Publication Year: 2003, Page(s):614 - 618
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (406 KB) | HTML iconHTML

    This paper describes and compares three methods for detection of low RCS radar targets in heavy sea clutter using a high PRF radar. Two methods are based on auto-regressive processes, one on Karhunen-Loeve decomposition. Experiments have been performed on DSTO sea clutter dataset using these methods and the results are presented in this paper. View full abstract»

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  • Susceptibility of a personal computer to radar

    Publication Year: 2003, Page(s):156 - 161
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (419 KB) | HTML iconHTML

    In this paper, a generic susceptibility model of a personal computer (PC) was derived using generic coupling characteristics of cables, enclosure with apertures, and a circuit board. Using experimental upset data for digital semiconductor components, electric field intensities were calculated for an unshielded PC board and a typical PC. The obtained results show the envelope of an electric field i... View full abstract»

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  • Ocean imaging using multichannel along track interferometry

    Publication Year: 2003, Page(s):251 - 256
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (546 KB) | HTML iconHTML

    An airborne multichannel along track interferometer (MATI) is described and discussed. This MATI system is based on an X-band SAR installed in a BAE/BAC 1-11 aircraft which can be set up with 2, 3 or 4 beams. It is demonstrated that a MATI can be used to Doppler filter radar signals acquired from a moving platform which are scattered by moving and partially coherent scatterers. Processing techniqu... View full abstract»

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  • Performance analysis of the weighted window CFAR algorithms [radar signal processing]

    Publication Year: 2003, Page(s):354 - 357
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (289 KB) | HTML iconHTML

    With the deterioration of radar operation environment and the enhancement of menace to radar, the task of radar target detection becomes more complicated. Such as the detection of airplane, ship or cruise missile in over the horizon radar (OTHR), and the detection of moving targets in synthetic aperture radar (SAR). Therefore, it is necessary to make a further study of CFAR algorithms. The perform... View full abstract»

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  • Low-cost realisation of space-borne synthetic aperture radar - MICROSAR (September 2003)

    Publication Year: 2003, Page(s):327 - 332
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (730 KB) | HTML iconHTML

    This paper presents an overview of the MicroSAR satellite, showing the approach adopted to realise a truly low cost space-borne SAR system. The rationale leading to the proposed design, an outline of the overall structure of the associated imaging system, a review of the performance estimated for the resulting MicroSAR imaging system and a view of the airborne demonstrator, are provided. View full abstract»

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  • On the use of entropy for optimal radar resource management and control

    Publication Year: 2003, Page(s):572 - 577
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (491 KB) | HTML iconHTML

    The use of information entropy as a quantitative measure of uncertainty for radar resource management and control objectives is explored and applied to issues of current interest. It is seen to be rigorous and objective, and therefore potentially superior to heuristic, rule-based approaches for problems which can be formulated in probabilistic terms. It is particularly appropriate for sensor syste... View full abstract»

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  • Inverting the spherical Radon transform for 3D SAR image formation

    Publication Year: 2003, Page(s):466 - 471
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (387 KB) | HTML iconHTML

    In this paper, we show how image formation or reconstruction in synthetic aperture radar (SAR) in three dimensions can be viewed as the inversion of the spherical Radon transform. The advantage of viewing image formation in this way is that it could be used in situations where more standard methods could fail, such as high squint and ultra-wideband SAR. We build upon previous work by others and ou... View full abstract»

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  • Position-adaptive UAV radar for urban environments

    Publication Year: 2003, Page(s):303 - 308
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (402 KB) | HTML iconHTML

    A bistatic radar concept is presented where a low-altitude UAV (unmanned aerial vehicle) "position-adaptively" converges to line-of-sight (LOS) locations for objects that are embedded between buildings. The concept is developed by deriving approximate electromagnetic signal models based on the uniform theory of diffraction (UTD). In addition, a new signature exploitation technique is formulated th... View full abstract»

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  • Performance evaluation for modern radars

    Publication Year: 2003, Page(s):547 - 553
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (510 KB) | HTML iconHTML

    Modern radar systems are procured with tight specifications on a large number of different parameters. It is in the interests both of the customer and of the supplier that the procedures used evaluate radar performance are mathematically rigorous, precise and as cost-effective as possible. This paper describes some methods of evaluating the performance of different modes of modern radar system and... View full abstract»

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