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Zeitschriftenartikel zum Thema "Doppler radar Testing":
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Shvets, S., O. Kipriianov, F. Yermolenko und I. Haidak. „SUGGESTIONS FOR TYPICAL METHODS OF USING DOPPLER RADAR SYSTEMS OF TRAJECTORY MEASUREMENTS DURING TESTS OF ARTYLLERY ARMAMENT AND ITS AMMUNITION“. Наукові праці Державного науково-дослідного інституту випробувань і сертифікації озброєння та військової техніки, Nr. 7 (21.05.2021): 94–100. http://dx.doi.org/10.37701/dndivsovt.7.2021.11.
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The article analyzes the report documentation of the tests in which the Doppler radar trajectory measurement system MFTR–2100/40 and the muzzle velocity measurement system SL-520PE were used to determine the trajectory parameters of artillery armament.
The purpose of the article is to provide proposals for standard methods of using Doppler radar systems of trajectory measurements when testing artillery armament and its ammunition.
The proposals for these standard methods are based on the experience of using the MFTR–2100/40 radar system and the SL–520PE muzzle velocity measurement system during the tests of the latest specimens of artillery and ammunition and relate to typical Doppler radar systems. When choosing the position and mode of operation of such Doppler radar trajectory measurement systems, it is always necessary to take into account safety measures, instructions for their operation, technical features (capabilities) of radar systems specified in this article, considering the interference environment during firing (shot) of artillery armament and experiment (test) conditions. Placing typical Doppler radar systems when taking measurements in unplanned places is dangerous for the crew and measuring instruments and leads to partial or complete loss of measuring trajectory information and reduced measurement accuracy.
Abovementioned proposals are offered to be taken into account when developing methods of trajectory measurements using typical Doppler radar systems during testing artillery armament and its ammunition.
Methods of measurements using standard Doppler radar systems of trajectory measurements should be developed in accordance with current standards (GOST 8.010-99, GOST V 15.211-78 and others) for a particular test, taking into account the results of analysis of the characteristics of samples to be evaluated, measuring instruments used, conditions and locations of measurements.
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Heymsfield, Andrew J., Alain Protat, Dominique Bouniol, Richard T. Austin, Robin J. Hogan, Julien Delanoë, Hajime Okamoto et al. „Testing IWC Retrieval Methods Using Radar and Ancillary Measurements with In Situ Data“. Journal of Applied Meteorology and Climatology 47, Nr. 1 (01.01.2008): 135–63. http://dx.doi.org/10.1175/2007jamc1606.1.
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Abstract Vertical profiles of ice water content (IWC) can now be derived globally from spaceborne cloud satellite radar (CloudSat) data. Integrating these data with Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) data may further increase accuracy. Evaluations of the accuracy of IWC retrieved from radar alone and together with other measurements are now essential. A forward model employing aircraft Lagrangian spiral descents through mid- and low-latitude ice clouds is used to estimate profiles of what a lidar and conventional and Doppler radar would sense. Radar reflectivity Ze and Doppler fall speed at multiple wavelengths and extinction in visible wavelengths were derived from particle size distributions and shape data, constrained by IWC that were measured directly in most instances. These data were provided to eight teams that together cover 10 retrieval methods. Almost 3400 vertically distributed points from 19 clouds were used. Approximate cloud optical depths ranged from below 1 to more than 50. The teams returned retrieval IWC profiles that were evaluated in seven different ways to identify the amount and sources of errors. The mean (median) ratio of the retrieved-to-measured IWC was 1.15 (1.03) ± 0.66 for all teams, 1.08 (1.00) ± 0.60 for those employing a lidar–radar approach, and 1.27 (1.12) ± 0.78 for the standard CloudSat radar–visible optical depth algorithm for Ze > −28 dBZe. The ratios for the groups employing the lidar–radar approach and the radar–visible optical depth algorithm may be lower by as much as 25% because of uncertainties in the extinction in small ice particles provided to the groups. Retrievals from future spaceborne radar using reflectivity–Doppler fall speeds show considerable promise. A lidar–radar approach, as applied to measurements from CALIPSO and CloudSat, is useful only in a narrow range of ice water paths (IWP) (40 < IWP < 100 g m−2). Because of the use of the Rayleigh approximation at high reflectivities in some of the algorithms and differences in the way nonspherical particles and Mie effects are considered, IWC retrievals in regions of radar reflectivity at 94 GHz exceeding about 5 dBZe are subject to uncertainties of ±50%.
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Azizi, Mussyazwann Azizi Mustafa, Mohammad Nazrin Mohd Noh, Idnin Pasya, Ahmad Ihsan Mohd Yassin und Megat Syahirul Amin Megat Ali. „Pedestrian detection using Doppler radar and LSTM neural network“. IAES International Journal of Artificial Intelligence (IJ-AI) 9, Nr. 3 (01.09.2020): 394. http://dx.doi.org/10.11591/ijai.v9.i3.pp394-401.
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<span lang="EN-US">Integration of radar systems as primary sensor with deep learning algorithms in driver assist systems is still limited. Its implementation would greatly help in continuous monitoring of visual blind spots from incoming pedestrians. Hence, this study proposes a single-input single-output based Doppler radar and long short-term memory (LSTM) neural network for pedestrian detection. The radar is placed in monostatic configuration at an angle of 45 degree from line of sight. Continuous wave with frequency of 1.9 GHz are continuously transmitted from the antenna. The returning signal from the approaching subjects is characterized by the branching peaks higher than the transmitted frequency. A total of 1108 spectrum traces with Doppler shifts characteristics is acquired from eight volunteers. Another 1108 spectrum traces without Doppler shifts are used for control purposes. The traces are then fed to LSTM neural network for training, validation and testing. Generally, the proposed method was able to detect pedestrian with 88.9% accuracy for training and 87.3% accuracy for testing.</span>
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Lyashenko, V., V. Kuznecov, O. Kipriianov, F. Yermolenko und T. Pavliuk. „RECOMMENDATIONS ON INTEGRATED APPLICATION OF DOPPLER RADAR SYSTEMS OF EXTERNAL TRACTORY MEASUREMENTS IN THE MOBILE TESTING GROUND MEASURING AND COMPUTING COMPLEX“. Наукові праці Державного науково-дослідного інституту випробувань і сертифікації озброєння та військової техніки, Nr. 8 (29.06.2021): 72–79. http://dx.doi.org/10.37701/dndivsovt.8.2021.08.
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Testing ground measuring and computing complex (TGMCC) is a set of interconnected hardware and software designed to perform measurements and processing of measuring information to determine the tactical and technical characteristics of objects in different conditions of their application, objective evaluation of test results of armament and military equipment (AME).
For radar measurements of trajectory parameters of moving objects, mobile and stationary radar stations of trajectory measurements are used, including Doppler radar systems of external trajectory measurements. Such radar stations of trajectory measurements are one of the components of TGMCC. They are designed to measure, process and record the parameters of the trajectories of moving objects in a given spatial volume with a given accuracy and reliability during testing of a wide range of new and upgraded samples of AME, as well as perform measurements along with optoelectronic stations of trajectory measurements, or they could be used separately from them.
Therefore, currently there is a problem of creation of mobile testing ground measuring and computing complex which consists in its equipping by modern means of external trajectory measurements, both domestic and foreign.
Thus, the proposed recommendations for the integrated application of Doppler radar systems of external trajectory measurements as a part of a mobile testing ground measuring and computing complex will allow to conduct testing and certification of armament and military equipment offered for supply to the Armed Forces of Ukraine more efficiently and with increased quality.
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Zou, Tao, Xian Lin Zeng und Jian Hua Peng. „Research on the Airborne Pulse Doppler Radar Jamming System Tester“. Applied Mechanics and Materials 654 (Oktober 2014): 250–53. http://dx.doi.org/10.4028/www.scientific.net/amm.654.250.
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This paper introduces the design of an airborne pulse Doppler radar jamming system tester. Based on a detailed analysis of the functional structure of the radar-jamming system, we summarize the important failure mode. To achieve fault location and performance testing, we have developed an automatic detector for the radar-jamming system, the device uses a mode of hardware platform and software platform, and it can reach the purpose of fault location by a method of encouraging input and measuring the output of each of the radar-jamming system failure mode individually. The automatic test instrument has the features of simple operation, high degree of automation, real-time, scalable, and actual use of running proves it to reach the required design specifications, the test with good results.
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Diewald, Andreas R., Manuel Steins und Simon Müller. „Radar target simulator with complex-valued delay line modeling based on standard radar components“. Advances in Radio Science 16 (18.12.2018): 203–13. http://dx.doi.org/10.5194/ars-16-203-2018.
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Abstract. With increasing radar activities in the automotive, industrial and private sector, there is a need to test radar sensors in their environment. A radar target simulator can help testing radar systems repeatably. In this paper, the authors present a concept of low-cost hardware for radar target simulation. The theoretical foundations are derived and analyzed. An implementation of a demonstrator operating in the 24 GHz ISM band is shown for which the dynamical range simulation was implemented in a FPGA with fast sampling ADCs and DACs. By using a FIR filtering approach a fine discretization of the range could be reached which will furthermore allow an inherent and automatic Doppler simulation by moving the target.
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Dubosclard, G., R. Cordesses, P. Allard, C. Hervier, M. Coltelli und J. Kornprobst. „First testing of a volcano Doppler radar (Voldorad) at Mount Etna, Italy“. Geophysical Research Letters 26, Nr. 22 (15.11.1999): 3389–92. http://dx.doi.org/10.1029/1999gl008371.
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Muscarella, Philip, Kelsey Brunner und David Walker. „Estimating Coastal Winds by Assimilating High-Frequency Radar Spectrum Data in SWAN“. Sensors 21, Nr. 23 (24.11.2021): 7811. http://dx.doi.org/10.3390/s21237811.
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Many activities require accurate wind and wave forecasts in the coastal ocean. The assimilation of fixed buoy observations into spectral wave models such as SWAN (Simulating Waves Nearshore) can provide improved estimates of wave forecasts fields. High-frequency (HF) radar observations provide a spatially expansive dataset in the coastal ocean for assimilation into wave models. A forward model for the HF Doppler spectrum based on first- and second-order Bragg scattering was developed to assimilate the HF radar wave observations into SWAN. This model uses the spatially varying wave spectra computed using the SWAN model, forecast currents from the Navy Coastal Ocean Model (NCOM), and system parameters from the HF radar sites to predict time-varying range-Doppler maps. Using an adjoint of the HF radar model, the error between these predictions and the corresponding HF Doppler spectrum observations can be translated into effective wave-spectrum errors for assimilation in the SWAN model for use in correcting the wind forcing in SWAN. The initial testing and validation of this system have been conducted using data from ten HF radar sites along the Southern California Bight during the CASPER-West experiment in October 2017. The improved winds compare positively to independent observation data, demonstrating that this algorithm can be utilized to fill an observational gap in the coastal ocean for winds and waves.
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Foth, Andreas, Janek Zimmer, Felix Lauermann und Heike Kalesse-Los. „Evaluation of micro rain radar-based precipitation classification algorithms to discriminate between stratiform and convective precipitation“. Atmospheric Measurement Techniques 14, Nr. 6 (21.06.2021): 4565–74. http://dx.doi.org/10.5194/amt-14-4565-2021.
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Abstract. In this paper, we present two micro rain radar-based approaches to discriminate between stratiform and convective precipitation. One is based on probability density functions (PDFs) in combination with a confidence function, and the other one is an artificial neural network (ANN) classification. Both methods use the maximum radar reflectivity per profile, the maximum of the observed mean Doppler velocity per profile and the maximum of the temporal standard deviation (±15 min) of the observed mean Doppler velocity per profile from a micro rain radar (MRR). Training and testing of the algorithms were performed using a 2-year data set from the Jülich Observatory for Cloud Evolution (JOYCE). Both methods agree well, giving similar results. However, the results of the ANN are more decisive since it is also able to distinguish an inconclusive class, in turn making the stratiform and convective classes more reliable.
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Beckwith, Dana M., und Katharine M. Hunter-Zaworski. „Passive Pedestrian Detection at Unsignalized Crossings“. Transportation Research Record: Journal of the Transportation Research Board 1636, Nr. 1 (Januar 1998): 96–103. http://dx.doi.org/10.3141/1636-16.
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The city of Portland, Oregon, is researching ways to provide safe unsignalized crossings for pedestrians. A concept that shows promise is known as passive pedestrian detection. Passive pedestrian detection is the detection of pedestrians in a stationary or moving state at the curbside of or in a pedestrian crossing by means other than those requiring physical response by the pedestrian. Research was conducted to find sensor technologies that can be used to passively detect pedestrians. Five technologies were found to be options for this type of detection: passive infrared, ultrasonic, microwave radar, video imaging, and piezometric. Of these five technologies, passive infrared, ultrasonic, and microwave radar were selected for testing. An unbiased selection of sensors was made by using a decision matrix in the form of the quality function deployment method, which also provides a record of sensor information for future research. Preliminary testing was conducted on the sensors to ensure that the detection of pedestrians was possible and to determine sensor operating characteristics. Sensors then went through secondary tests to ensure proper operation at an unsignalized crossing. The secondary test site was retrofitted with reflective pedestrian crossing signs, yellow beacons, Doppler radar, and passive infrared sensors chosen from the preliminary tests. Initial secondary tests have shown promising results for the Doppler radar and especially for the passive infrared sensors. Future applications of passive pedestrian detection in Portland will involve installation of sensors at signalized pedestrian crossings.
Vandepeer, Brenton. „A new mf Doppler radar for upper atmospheric research /“. Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09phv2273.pdf.
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Du, Plessis Dane. „Integration and testing of a digital transceiver for a dual frequency, pulse-doppler radar“. Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/23015.
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This dissertation focuses on the development of a digital transceiver system for a dual-band, polarimetric radar, which is to form part of the NeXtRAD multistatic radar. NeXtRAD is being developed as an instrument for research into the behaviour of clutter and targets as observed by multistatic radars. The Pentek Cobalt model 71621 software defined radio interface was procured for use as the digital transceiver in the system. The goal was to develop the software needed to use this product as the digital transceiver in a prototype version of the NeXtRAD active node, and to ensure that it could be readily integrated with other subsystems in the final system. The active node is essentially a monostatic pulse-doppler radar. Laboratory tests of the transceiver showed that it was possible to generate and digitize pulsed waveforms at a 125 MHz intermediate frequency which is used by the existing receiver exciter in the system. After extensive laboratory testing and development, phase coherent waveform generation and multichannel digitization was achieved. A low transmit power version of the active node was constructed and tested at both operating frequencies. Equipment used in the testing and development of the digital transceiver included laboratory signal generators, spectrum analyzers and oscilloscopes. The digital transceiver was able to function at pulse repetition rates exceeding 2 kHz, with a single transmit channel and three receive channels active. The lowpowered monostatic prototype system was constructed to test the digital transceiver using a receiver exciter subsystem, RF amplifiers and antennas. This prototype radar was used to take measurements of targets at ranges below 300 m and successfully detected reflections from large structures. Cars and pedestrian traffic were detected by their doppler shifts at both L- and X-band frequencies. The detection of moving and stationary targets confirmed the suitability of the digital transceiver for use in the envisioned multistatic radar system.
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ALRimawi, Mohammed. „Doppler Wheel for Emulation of Automotive Radar Target“. Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-39803.
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Automotive radar is an emerging field of research and development. Technological advancements in this field will improve safety for vehicles, pedestrians, and bicyclists, and enable the development of autonomous vehicles. Usage of the Automotive radar is expanding in car and road areas to reduce collisions and accident. Automotive radar developers face a problem to test their radar sensor in the street since there are a lot of interferences signals, noise and unpredicted situations. This thesis provides a part of the solution for this problem by designing a device can demonstrate a different speeds value. This device will help the developer to test their radar sensor inside an anechoic chamber room that provides accurate control of the environmental conditions. This report shows how to build the measuring setup device, step by step to demonstrate the people and vehicle’s speed in the street by a Doppler emulator using the wheel for millimetre FWMC radar. Linear speed system needs a large space for testing, but using the rotational wheel allow the developer to test the radar sensor in a small area. It begins with the wheel design specifications and the relation between the rotational speed (RPM) of the wheel and the Doppler frequency. The Doppler frequency is changed by varying the speed of the wheel. Control and power circuit was carefully designed to control the wheel speed accurately. All the measuring setup device parts were assembled in one box. Also, signal processing was done by MATLAB to measure the Doppler frequency using millimetre FMCW radar sensor. The measuring setup device was tested in the anechoic chamber room for different speeds. the manual and automatic tests show good results to measure the different wheel speeds with high accuracy. Combined Radar-Based Communication and Interference Mitigation for Automotive Applications EMC Hammer
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May, Peter T. „VHF radar studies of the troposphere /“. Title page, contents and summary only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phm4666.pdf.
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"July 2003." Includes bibliographical references (leaves 459-484) Electronic publication; full text available in PDF format; abstract in HTML format. Details the application of a medium frequency Doppler radar to observations of meteorites entering the Earth's atmosphere. Techniques were developed that verified system performance was to specification Electronic reproduction.[Australia] :Australian Digital Theses Program,2001. xx, 485 leaves : ill. ; 30 cm.
Bücher zum Thema "Doppler radar Testing":
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IEEE National Radar Conference (1996 Ann Arbor, Mich.). The proceedings of the 1996 IEEE National Radar Conference: Held at the University of Michigan, Ann Arbor, Michigan 13-16 May, 1996. New York, N.Y: IEEE Aerospace and Electronic Systems Society, 1996.
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Institute Of Electrical and Electronics Engineers und IEEE Aerospace & Electronics Systems Soc. 1996 IEEE National Radar Conference. Institute of Electrical & Electronics Enginee, 1997.
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Konferenzberichte zum Thema "Doppler radar Testing":
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Battisti, Nicola. „STAP for airborne HPRF pulse Doppler radar: developing and testing of algorithm on both simulated and real data“. In 2008 IEEE Radar Conference (RADAR). IEEE, 2008. http://dx.doi.org/10.1109/radar.2008.4720779.
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Harrah, S., E. Bracalente, P. Schaffner und C. Britt. „NASA's airborne Doppler radar for detection of hazardous wind shear - Development and flight testing“. In Aircraft Design, Systems, and Operations Meeting. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-3946.
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LAWRENCE, T. R., F. F. HALL und S. E. MOODY. „Results of performance testing of a 100-W frequency-stable pulsed CO2 laser Doppler radar transceiver“. In Conference on Lasers and Electro-Optics. Washington, D.C.: OSA, 1985. http://dx.doi.org/10.1364/cleo.1985.fc4.
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PARATE, B. A., HIMANSHU SINGH, A. K. SAHU und P. W. SONAWANE. „INSTRUMENTATION, EVALUATION AND TEST METHOD OF CARTRIDGE ACTUATED DEVICE (CAD) FOR AIRCRAFT APPLICATION“. In 32ND INTERNATIONAL SYMPOSIUM ON BALLISTICS. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/ballistics22/36081.
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This research work describes a proficient method about the instrumentation, evaluation, and test method of cartridge actuated devices (CAD) using a velocity test rig (VTR) for aircraft applications. CADs are known as gas generating devices that are installed on various military aircraft of Naval bases and Air Force to perform a highly significant task such as deployment of parachute, catapult, ejection of seat, thrusters, release of bomb, cutting action of cable, fuel tanks etc. These devices produce high temperature and pressure combustion gases on initiation. As these devices are utilizing once in life time and their end use cannot be tested by non-destructive techniques. Therefore, such devices are developed with high quality and reliability. All the safety aspects are considered during various stages of development and testing. The device presented in this article has undergone rigorous qualification trials before assigning a useful and serviceable life. The projectile velocity was determined experimentally with a Doppler RADAR at cold and hot conditions. These velocities vary from 142.76 ms-1 to 164.23 ms-1. This study provides new insight into the measurement of projectile velocity using Doppler RADAR.
