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Articoli di riviste sul tema "Applications sur GPUs"

Autore: Grafiati

Pubblicato: 14 dicembre 2024

Ultima modifica: 31 luglio 2025

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1

Zhang, Yongqiang, Jianxiong Zhou, Zhiyong Song, and Kaixin Zhou. "High-Precision GPU-Accelerated Simulation Algorithm for Targets under Non-Uniform Cluttered Backgrounds." Remote Sensing 15, no. 19 (2023): 4664. http://dx.doi.org/10.3390/rs15194664.

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This article presents a high-precision airborne video synthetic aperture radar (SAR) raw echo simulation method aimed at addressing the issue of simulation accuracy in video SAR image generation. The proposed method employs separate techniques for simulating targets and ground clutter, utilizing pre-existing SAR images for clutter simulation and employing the shooting and bouncing rays (SBR) approach to generate target echoes. Additionally, the method accounts for target-generated shadows to enhance the realism of the simulation results. The fast simulation algorithm is implemented using the C

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Kumar, B. P., and C. S. Paidimarry. "Improved Real Time GPS RF Data Capturing for GNSS SDR Applications." Giroskopiya i Navigatsiya 28, no. 1 (2020): 42–53. http://dx.doi.org/10.17285/0869-7035.0023.

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Kumar, B. P., and C. S. Paidimarry. "Improved Real Time GPS RF Data Capturing for GNSS SDR Applications." Gyroscopy and Navigation 11, no. 1 (2020): 59–67. http://dx.doi.org/10.1134/s2075108720010083.

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4

Khalid, Hussein Kuther, Hazem Ali Israa, and Khlf Ahmed Riyadh. "Radiation effect of fractal sierpinski square patch antenna." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 5 (2020): 5329–34. https://doi.org/10.11591/ijece.v10i5.pp5329-5334.

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Biological tissue interaction with Electromagnetic fields became one of the interesting studies in the last years. Wide variety wireless electronic devices are emerged in day to day life each providing a wireless connection for a certain service such as Global Positioning System, broadcasting systems, mobile communication systems, and networking. In this research article, fractal sierpinski square patch antenna is proposed and simulated to operate over L1 frequency range of 1.575 GHz for GPS applications using CST studio Suite where the proposed antenna has been investigated on Carpet shaped s

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Tabibi, Sajad, Felipe G. Nievinski, Tonie van Dam, and João F. G. Monico. "Assessment of modernized GPS L5 SNR for ground-based multipath reflectometry applications." Advances in Space Research 55, no. 4 (2015): 1104–16. http://dx.doi.org/10.1016/j.asr.2014.11.019.

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Sajous, Patricia. "En route avec l’IA ! Incidence de l’IA et de l’informatique ubiquitaire dans l’établissement de la mobilité quotidienne : le cas des applications GPS." Flux Pub. anticipées, no. 4 (2022): I3—XV. http://dx.doi.org/10.3917/flux1.pr1.0003.

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L&#8217;IA (intelligence artificielle) colonise de plus en plus de secteurs du quotidien. Comment prendre cela en compte dans les recherches en sciences humaines portant sur la mobilit&#233; quotidienne&#160;? Cet article est l&#8217;occasion de s&#8217;interroger sur les cadres th&#233;orique et m&#233;thodologique &#224; mettre en place. Nous d&#233;veloppons la notion de &#171;&#160;corps augment&#233;&#160;&#187; et consid&#233;rons les objets techniques permettant l&#8217;augmentation comme des &#171;&#160;non humains

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Duan, Huizhi, Yongsheng Li, Bingquan Li, and Hao Li. "Fast InSAR Time-Series Analysis Method in a Full-Resolution SAR Coordinate System: A Case Study of the Yellow River Delta." Sustainability 14, no. 17 (2022): 10597. http://dx.doi.org/10.3390/su141710597.

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Ground deformation is a major determinant of delta sustainability. Sentinel-1 Terrain Observation by Progressive Scans (TOPS) data are widely used in interferometric synthetic aperture radar (InSAR) applications to monitor ground subsidence. Due to the unparalleled mapping coverage and considerable data volume requirements, high-performance computing resources including graphics processing units (GPUs) are employed in state-of-the-art methodologies. This paper presents a fast InSAR time-series processing approach targeting Sentinel-1 TOPS images to process massive data with higher efficiency a

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Savelonas, Michalis A., Christos N. Veinidis, and Theodoros K. Bartsokas. "Computer Vision and Pattern Recognition for the Analysis of 2D/3D Remote Sensing Data in Geoscience: A Survey." Remote Sensing 14, no. 23 (2022): 6017. http://dx.doi.org/10.3390/rs14236017.

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Historically, geoscience has been a prominent domain for applications of computer vision and pattern recognition. The numerous challenges associated with geoscience-related imaging data, which include poor imaging quality, noise, missing values, lack of precise boundaries defining various geoscience objects and processes, as well as non-stationarity in space and/or time, provide an ideal test bed for advanced computer vision techniques. On the other hand, the developments in pattern recognition, especially with the rapid evolution of powerful graphical processing units (GPUs) and the subsequen

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9

Shi, Ming Xing, Bi Yu Tang, and Ao Peng. "A Cascade Tracking Loop for Weak GPS Signals." Applied Mechanics and Materials 719-720 (January 2015): 1116–23. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.1116.

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It’s important to get accurate carrier phase and frequency information when using a standalone GPS receiver. In weak signal applications, to keep a stable tracking is hard to achieve because measuring error will be huge when the SNR is low. Different methods are used to improve the SNR before the detector in a tracking process, such as coherence integration. And this paper keeps eyes on a different viewpoint, on how to refine estimation results. A cascade structure is introduced for weak signal tracking. This structure is divided into two levels. In the first level, raw phase estimation and ac

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10

Alwhibi, Mona S., Dina A. Soliman, Manal A. Awad, Asma B. Alangery, Horiah Al Dehaish, and Yasmeen A. Alwasel. "Green synthesis of silver nanoparticles: Characterization and its potential biomedical applications." Green Processing and Synthesis 10, no. 1 (2021): 412–20. http://dx.doi.org/10.1515/gps-2021-0039.

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Abstract In recent times, research on the synthesis of noble metal nanoparticles (NPs) has developed rapidly and attracted considerable attention. The use of plant extracts is the preferred mode for the biological synthesis of NPs due to the presence of biologically active constituents. Aloe vera is a plant endowed with therapeutic benefits especially in skincare due to its unique curative properties. The present study focused on an environmental friendly and rapid method of phytosynthesis of silver nanoparticles (Ag-NPs) using A. vera gel extract as a reductant. The synthesized Ag-NPs were ch

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11

Yao, Yan Xin, Yun Zhao, and Jun Ye Zeng. "GPS Multipath Estimation with Improved SNR Adaptation Performance Utilizing Adaptive Filters." Advanced Materials Research 774-776 (September 2013): 1664–70. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.1664.

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Global positioning system multipath estimation is important for both high precision positioning and reflection applications. The paper aims at proposing a method for estimating multipath parameters including carrier phases with good SNR adaptation performance utilizing adaptive filters. The method takes the signal after demodulation and spectrum dispreading for the desired signal. It is found to have a desired signal with relatively higher SNR so that the filtering performance is relatively better than previously proposed method; whats more, the method could estimate multipath code delay prefe

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12

Mao, Wei-Lung, Chorng-Sii Hwang, Chung-Wen Hung, and Jyh Sheen. "Narrowband Interference Cancellation using Set-membership Adaptive Predictor for GPS Receiver." International Journal of Applied Mathematics and Informatics 15 (November 16, 2021): 59–64. http://dx.doi.org/10.46300/91014.2021.15.10.

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The global positioning system (GPS) provides accurate positioning and timing information that is useful in various civil and military applications. The adaptive filtering predictor for GPS jamming suppression applications is proposed. This research uses the gLab-G software to substitute for the hardware receiver to record the GPS signal waveform. The normalized least-mean-square (NLMS) and set-membership NLMS (SM-NLMS) filtering methods are employed for continuous wave interference suppression. Simulation results reveal that our proposed methods can provide the better performances when the int

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13

Gao, Jay, and Yansui Liu. "Applications of remote sensing, GIS and GPS in glaciology: a review." Progress in Physical Geography: Earth and Environment 25, no. 4 (2001): 520–40. http://dx.doi.org/10.1177/030913330102500404.

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Remote sensing has served as an efficient method of gathering data about glaciers since its emergence. The recent advent of Geographic Information Systems (GIS) and Global Positioning Systems (GPS) has created an effective means by which the acquired data are analysed for the effective monitoring and mapping of temporal dynamics of glaciers. A large number of researchers have taken advantage of remote sensing, GIS and GPS in their studies of glaciers. These applications are comprehensively reviewed in this paper. This review shows that glacial features identifiable from aerial photographs and

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14

Tan, Soon Heng Mavric, and Chai Kiat Yeo. "GPS Location Spoofing and FM Broadcast Intrusion Using Software-Defined Radio." International Journal of Interdisciplinary Telecommunications and Networking 12, no. 4 (2020): 104–17. http://dx.doi.org/10.4018/ijitn.2020100108.

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This paper makes use of a simple and inexpensive software-defined radio (SDR) to demonstrate the potential threats posed to wireless communication. SDR is a radio communication system where components that are traditionally implemented in hardware are being replaced via software running on computing devices. The authors make use of a simple SDR to demonstrate how local disruption to wireless communication can be easily carried out. In particular, the authors show how FM radio broadcast can be hijacked and the spoofing of GPS location signals using a single SDR on a local basis as well as how G

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Gaspar, João, Renato Ferreira, Pedro Sebastião, and Nuno Souto. "Capture of UAVs Through GPS Spoofing Using Low-Cost SDR Platforms." Wireless Personal Communications 115, no. 4 (2020): 2729–54. http://dx.doi.org/10.1007/s11277-020-07211-7.

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Ferreira, Renato, João Gaspar, Pedro Sebastião, and Nuno Souto. "Effective GPS Jamming Techniques for UAVs Using Low-Cost SDR Platforms." Wireless Personal Communications 115, no. 4 (2020): 2705–27. http://dx.doi.org/10.1007/s11277-020-07212-6.

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Dong, Lei, Niangang Jiao, Tingtao Zhang, Fangjian Liu, and Hongjian You. "GPU Accelerated Processing Method for Feature Point Extraction and Matching in Satellite SAR Images." Applied Sciences 14, no. 4 (2024): 1528. http://dx.doi.org/10.3390/app14041528.

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This paper addresses the challenge of extracting feature points and image matching in Synthetic Aperture Radar (SAR) satellite images, particularly focusing on large-scale embedding. The widely used Scale Invariant Transform (SIFT) algorithm, successful in computer vision and optical satellite image matching, faces challenges when applied to satellite SAR images due to the presence of speckle noise, leading to increased matching errors. The SAR–SIFT method is explored and analyzed in-depth, considering the unique characteristics of satellite SAR images. To enhance the efficiency of matching id

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18

Nayak, B. Sathish, K. Krishna Naik, Odelu Ojjela, and Surendra Pal. "GPS Receiver Simplification for Low cost Applications and Multipath Mitigation Analysis on SDR based Re configurable Software Receiver." Defence Science Journal 73, no. 06 (2023): 699–711. http://dx.doi.org/10.14429/dsj.73.19033.

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Many modern position-based applications rely heavily on the Global Navigation Satellite System (GNSS). Most applications require precise position data obtained through sophisticated hardware with a high computational capacity in the receiver. Some cost-effective applications may not require precise position data and require less complex signal processing. The use of efficient hardware and signal processing techniques to reduce the overall cost of a GNSS receiver is an active research topic. This paper considers Global Positioning System (GPS) constellation and proposes two factors to reduce th

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19

Zimmermann, Florian, Berit Schmitz, Lasse Klingbeil, and Heiner Kuhlmann. "GPS Multipath Analysis Using Fresnel Zones." Sensors 19, no. 1 (2018): 25. http://dx.doi.org/10.3390/s19010025.

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GNSS (Global Navigation Satellite Systems) multipath has been subject to scientific research for decades and although numerous methods and techniques have already been developed to mitigate this effect, it is still one of the accuracy-limiting factors in many GNSS applications. Since multipath is highly dependent on the individual antenna environment, there is still a need for new methods and further investigations to increase the understanding of this systematic effect. In this paper, the concept of Fresnel zones is applied to two different aspects of multipath. First, Fresnel zones are deter

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20

Sakhawat, S., M. Usman, and A. Hanif. "POWER BUDGET ANALYSIS OF REFLECTED GPS L1 AND L5 FREQUENCY SIGNALS FOR PASSIVE MICROWAVE IMAGING." Nucleus 51, no. 1 (2014): 87–92. https://doi.org/10.71330/thenucleus.2014.725.

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The GPS signals are commonly used for navigation purposes. Another utilization of reflected GPS signals is for remote sensing. This paper focuses on the power budget analysis of bi-static radar using GPS satellite as a â€œtransmitter of opportunityâ€. In this application the direct and reflected GPS signals are acquired using customized hardware, where the receiver can be mounted on an airborne platform or remain static. GPS satellites currently transmit L1 frequency signals with C/A codes used as a ranging signal, but plans for transmitting additional L5 frequency signals as part of GPS mode

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Novitskyi, Pavlo, and Mykhailo Stepanyak. "METHODS OF CREATING DIRECTIONAL ELECTROMAGNETIC INTERFERENCE FOR SELECTIVE INFLUENCE ON GPS/GLONASS: A REVIEW." Measuring Equipment and Metrology 86, no. 2 (2025): 105–12. https://doi.org/10.23939/istcmtm2025.02.105.

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Directional electromagnetic interference (DEMI) is an advanced method for selectively influencing Global Navigation Satellite Systems (GNSS), such as GPS and GLONASS, by generating controlled disruptions in targeted locations or frequency bands. The ability to precisely control electromagnetic interference is essential for applications in electronic warfare, cybersecurity, and controlled testing of GNSS vulnerabilities, where traditional wide-area jamming techniques may cause unnecessary collateral disruptions. The principle of directional EMI relies on advanced technologies, including beamfor

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22

Bruhn, Fredrik C., Nandinbaatar Tsog, Fabian Kunkel, Oskar Flordal, and Ian Troxel. "Enabling radiation tolerant heterogeneous GPU-based onboard data processing in space." CEAS Space Journal 12, no. 4 (2020): 551–64. http://dx.doi.org/10.1007/s12567-020-00321-9.

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Abstract The last decade has seen a dramatic increase in small satellite missions for commercial, public, and government intelligence applications. Given the rapid commercialization of constellation-driven services in Earth Observation, situational domain awareness, communications including machine-to-machine interface, exploration etc., small satellites represent an enabling technology for a large growth market generating truly Big Data. Examples of modern sensors that can generate very large amounts of data are optical sensing, hyperspectral, Synthetic Aperture Radar (SAR), and Infrared imag

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Peng, Hailong, Chongchong Zhou, Shiming Zhong, et al. "Analysis of Precise Orbit Determination for the HY2D Satellite Using Onboard GPS/BDS Observations." Remote Sensing 14, no. 6 (2022): 1390. http://dx.doi.org/10.3390/rs14061390.

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High-precision orbits of Low Earth Orbit (LEO) satellites are essential for many scientific applications, such as assessing the change in current global mean sea level, estimating the coefficients of gravity field, and so on. How to determinate the high-precision orbits for LEO satellites has gradually become an important research focus. HY2D is a new altimetry satellite of China, which is equipped with a Global Positioning System (GPS) and the third generations of the BeiDou Global Navigation Satellite System (BDS-3) in order to guarantee the reliability of orbital precision in radar altimetr

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Tamazin, Mohamed, Michael J. Korenberg, Haidy Elghamrawy, and Aboelmagd Noureldin. "GPS Swept Anti-Jamming Technique Based on Fast Orthogonal Search (FOS)." Sensors 21, no. 11 (2021): 3706. http://dx.doi.org/10.3390/s21113706.

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Recently, there has been growing demand for GPS-based reliable positioning, with the broadening of a range of new applications that mainly rely on GPS. GPS receivers have, recently, been attractive targets for jamming. GPS signals are received below the noise floor. Thus, they are vulnerable to interference and jamming. A jamming signal can potentially decrease the SNR, which results in disruption of GPS-based services. This paper aims to propose a reliable and accurate, swept anti-jamming technique based on high-resolution spectral analysis, utilizing the FOS method to provide an accurate spe

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Sana, Sahr, Kamelia Boodhoo, and Vladimir Zivkovic. "Production of starch nanoparticles through solvent-antisolvent precipitation in a spinning disc reactor." Green Processing and Synthesis 8, no. 1 (2019): 507–15. http://dx.doi.org/10.1515/gps-2019-0019.

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Abstract The spinning disc reactor (SDR) uses surface rotation to produce thin film flow with improved mixing and reduced residence times in chemical processing applications. Solvent-antisolvent precipitation is one such process that can benefit from these properties. This study investigates the film hydrodynamics and precipitation of starch nanoparticles by contacting starch dissolved in sodium hydroxide with ethanol as the antisolvent. One objective of this study is to understand how interactions of the disc surface topography (grooved and smooth) with other parameters such as liquid flowrat

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Yin, Qiang, You Wu, Fan Zhang, and Yongsheng Zhou. "GPU-Based Soil Parameter Parallel Inversion for PolSAR Data." Remote Sensing 12, no. 3 (2020): 415. http://dx.doi.org/10.3390/rs12030415.

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With the development of polarimetric synthetic aperture radar (PolSAR), quantitative parameter inversion has been seen great progress, especially in the field of soil parameter inversion, which has achieved good results for applications. However, PolSAR data is also often many terabytes large. This huge amount of data also directly affects the efficiency of the inversion. Therefore, the efficiency of soil moisture and roughness inversion has become a problem in the application of this PolSAR technique. A parallel realization based on a graphics processing unit (GPU) for multiple inversion mode

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Mikhailov, V. O., E. A. Kiseleva, E. P. Timoshkina, et al. "Joint inversion of the GPS and SAR data for the Gorkha, Nepal earthquake of 25.04.2015." Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa 15, no. 4 (2018): 119–27. http://dx.doi.org/10.21046/2070-7401-2018-15-4-119-127.

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Xu, Jia, Luo, and Hsu. "Intelligent GPS L1 LOS/Multipath/NLOS Classifiers Based on Correlator-, RINEX- and NMEA-Level Measurements." Remote Sensing 11, no. 16 (2019): 1851. http://dx.doi.org/10.3390/rs11161851.

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This paper proposes to use a correlator-level global positioning system (GPS) line-of-sight/multipath/non-line-of-sight (LOS/MP/NLOS) signal reception classifier to improve positioning performance in an urban environment. Conventional LOS/MP/NLOS classifiers, referred to as national marine electronics association (NMEA)-level and receiver independent exchange format (RINEX)-level classifiers, are usually performed using attributes extracted from basic observables or measurements such as received signal strength, satellite elevation angle, code pseudorange, etc. The NMEA/RINEX-level classificat

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Stiros, Stathis C., F. Moschas, and P. Triantafyllidis. "Modal frequencies of bridges from GNSS (GPS) monitoring data: Experimental, statistical evidence." Bridge Structures 17, no. 1-2 (2021): 3–14. http://dx.doi.org/10.3233/brs-210184.

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GNSS technology (known especially for GPS satellites) for measurement of deflections has proved very efficient and useful in bridge structural monitoring, even for short stiff bridges, especially after the advent of 100 Hz GNSS sensors. Mode computation from dynamic deflections has been proposed as one of the applications of this technology. Apart from formal modal analyses with GNSS input, and from spectral analysis of controlled free attenuating oscillations, it has been argued that simple spectra of deflections can define more than one modal frequencies. To test this scenario, we analyzed 2

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Lázaro, Janier González-Soler, Pérez-Suárez Airel, and Chang-Fernández Leonardo. "Algoritmo incremental de agrupamiento con traslape para el procesamiento de grandes colecciones de datos (Overlapping clustering incremental algorithm for large data collections processing)." GECONTEC: Revista Internacional de Gestión del Conocimiento y la Tecnología 3, no. 2 (2015): 1–12. https://doi.org/10.5281/zenodo.7467480.

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Resumen Existen diversos problemas en el Reconocimiento de Patrones y en la Minería de Datos que, por su naturaleza, consideran que los objetos pueden pertenecer a más de una clase o grupo. DClustR es un algoritmo dinámico de agrupamiento con traslape que ha mostrado, en tareas de agrupamiento de documentos, el mejor balance entre calidad de los grupos y eficiencia entre los algoritmos dinámicos de agrupamiento con traslape reportados en la literatura. A pesar de obtener buenos resultados, DClustR puede ser poco útil en aplicaciones que trabajen con grandes c

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Basit, Abdul, Amil Daraz, Muhammad Irshad Khan, Farid Zubir, Salman A. AlQahtan, and Guoqiang Zhang. "Design and Modelling of a Compact Triband Passband Filter for GPS, WiMAX, and Satellite Applications with Multiple Transmission Zero’s." Fractal and Fractional 7, no. 7 (2023): 511. http://dx.doi.org/10.3390/fractalfract7070511.

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Designing microwave filters with high selectivity and sharp roll-off between the stop and pass bands can be challenging due to the complex nature of the R.F. signals and the requirements for achieving high performance in a limited physical space. To achieve a high selectivity and sharp roll-off rate, this paper presents a compact filter with a triple passband response. The two different passbands at 1.57 GHz and 3.5 GHz are achieved using a step impedance resonator (SIR) with metallic slots perturbation added to the lower corner of the high impedance section of the SIRs, which helps to enhance

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Ameer, H. Ali, A. M. Al-Ja'afari Mohannad, and H. Abdulwahed Saif. "Performance assessment of antenna array for an unmanned air vehicle." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 2579–88. https://doi.org/10.11591/ijece.v10i3.pp2579-2588.

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In this paper, the performance of Linear Antenna Array Element (LAAE) has been evaluated at the Base Station (BS) with a different number of elements for Unmanned Air Vehicle UAV application. The Switched Beam (SB) and Phase Array (PA) have been used as a steering beam mechanism. The beam steering tracker is based on the GPS points of the UAV and the BS. In addition, the Misalignment angle has been analyzed for SB and PA corresponding to the maximum speed of the UAV. The compression between SB and PA in term of Bit Error Rate (BER) vs. Signal to Noise Ratio (SNR) and BER vs. Misalignment angle

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Liu, Mingqian, Zhiyang Gao, Yunfei Chen, Hao Song, Yuting Li, and Fengkui Gong. "Passive Detection of Moving Aerial Target Based on Multiple Collaborative GPS Satellites." Remote Sensing 12, no. 2 (2020): 263. http://dx.doi.org/10.3390/rs12020263.

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Passive localization is an important part of intelligent surveillance in security and emergency applications. Nowadays, Global Navigation Satellite Systems (GNSSs) have been widely deployed. As a result, the satellite signal receiver may receive multiple GPS signals simultaneously, incurring echo signal detection failure. Therefore, in this paper, a passive method leveraging signals from multiple GPS satellites is proposed for moving aerial target detection. In passive detection, the first challenge is the interference caused by multiple GPS signals transmitted upon the same spectrum resources

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Chen, Jiongming, Pengju Yang, Rong Zhang, and Rui Wu. "A Fast Inverse Synthetic Aperture Radar Imaging Scheme Combining GPU-Accelerated Shooting and Bouncing Ray and Back Projection Algorithm under Wide Bandwidths and Angles." Electronics 13, no. 15 (2024): 3062. http://dx.doi.org/10.3390/electronics13153062.

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Inverse synthetic aperture radar (ISAR) imaging techniques are frequently used in target classification and recognition applications, due to its capability to produce high-resolution images for moving targets. In order to meet the demand of ISAR imaging for electromagnetic calculation with high efficiency and accuracy, a novel accelerated shooting and bouncing ray (SBR) method is presented by combining a Graphics Processing Unit (GPU) and Bounding Volume Hierarchies (BVH) tree structure. To overcome the problem of unfocused images by a Fourier-based ISAR procedure under wide-angle and wide-ban

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Stiros, Stathis C. "GNSS (GPS) Monitoring of Dynamic Deflections of Bridges: Structural Constraints and Metrological Limitations." Infrastructures 6, no. 2 (2021): 23. http://dx.doi.org/10.3390/infrastructures6020023.

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The advent of modern geodetic satellite techniques (GNSS, including GPS) permitted to observe dynamic deflections of bridges, initially of long flexible ones, and more recently of short, essentially stiff bridges with modal frequencies > 1 Hz, and with small SNR (signal-to-noise ratio), even SNR < 1. This was an enormous progress, but not without problems. Apart from monitoring results consistent with structural models, experimental data and serviceability criteria, there exist some apparently unexplained cases of stiff bridges for which there have been claimed apparent dynamic deflectio

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Tabata, Kenichi, Madoka Nakajima, and Naohiko Kohtake. "Design of Entry Detection Method for Top-Bounded Spaces Using GPS SNR and Spatial Characteristics for Seamless Positioning in Logistics Facilities." Sensors 20, no. 23 (2020): 6864. http://dx.doi.org/10.3390/s20236864.

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With the widespread use of indoor positioning technology, various services based on this technology are beginning to be offered to consumers and industrial applications. In the case of logistics facilities, in addition to indoor and outdoor spaces, there are top-bounded spaces (TBSs): elongated areas that are covered with roofs or eaves on the upper parts of buildings. The sides of such spaces are open, and workers and forklifts work in these areas. Only a few studies have been conducted on positioning methods for this unusual environment, and the way by which Signal-to-Noise Ratio (SNR) of Gl

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Nayak, B. Sathish, Sidharth Bhonge, K. Krishna Naik, Odelu Ojjela, and Surendra Pal. "Multi GNSS IRNSS L5 IRNSS S1 and GPS L1 Hybrid Simulator A Reconfigurable Low cost Solution for Research and Defence Applications." Defence Science Journal 72, no. 4 (2022): 581–91. http://dx.doi.org/10.14429/dsj.72.17873.

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Satellite-based positioning field of research is growing rapidly as there is an increase in demand for precise position requirements in various civil and commercial applications. There are many errors that affect the GNSS signals while propagation from satellite to receiver, which eventually induces errors in pseudo-range measurements. In order to assess the receiver characteristics for a specific error condition, the real-time signals may not be appropriate, and it is challenging to perform repeated experiments with the same error condition. The advantage of the GNSS simulator is that users c

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38

Paun, Mirel. "Through-Wall Imaging Using Low-Cost Frequency-Modulated Continuous Wave Radar Sensors." Remote Sensing 16, no. 8 (2024): 1426. http://dx.doi.org/10.3390/rs16081426.

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Many fields of human activity benefit from the ability to create images of obscured objects placed behind walls and to map their displacement in a noninvasive way. Usually, imaging devices like Synthetic Aperture Radars (SARs) and Ground-Penetrating Radars (GPRs) use expensive dedicated electronics which results in prohibitive prices. This paper presents the experimental implementation and the results obtained from an imaging system capable of performing SAR imaging and interferometric displacement mapping of targets located behind walls, as well as 3D GPR imaging using a low-cost general-purp

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Gong, Xiaolin, and Tingting Qin. "Airborne Earth Observation Positioning and Orientation by SINS/GPS Integration Using CD R-T-S Smoothing." Journal of Navigation 67, no. 2 (2013): 211–25. http://dx.doi.org/10.1017/s0373463313000623.

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This paper addresses the issue of state estimation in the integration of a Strapdown Inertial Navigation System (SINS) and Global Positioning System (GPS), which is used for airborne earth observation positioning and orientation. For a nonlinear system, especially with large initial attitude errors, the performance of linear estimation approaches will degrade. In this paper a nonlinear error model based on angle errors is built, and a nonlinear estimation algorithm called the Central Difference Rauch-Tung-Striebel (R-T-S) Smoother (CDRTSS) is utilized in SINS/GPS integration post-processing. I

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Williams, Simon D. P., Paul S. Bell, David L. McCann, Richard Cooke, and Christine Sams. "Demonstrating the Potential of Low-Cost GPS Units for the Remote Measurement of Tides and Water Levels Using Interferometric Reflectometry." Journal of Atmospheric and Oceanic Technology 37, no. 10 (2020): 1925–35. http://dx.doi.org/10.1175/jtech-d-20-0063.1.

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AbstractA low-cost [$30 (U.S. dollars)] consumer grade GPS receiver with a sideways-mounted antenna has been applied to measure tidal water levels at a mesotidal coastal site using an interferometric reflectometry approach. The proof-of-concept system was installed approximately 16 m above mean sea level in close proximity to a conventional bubbler tide gauge that provided validation data. The received signal-to-noise ratios (SNR) for the satellites in view were recorded for several months during two successive years and the observed frequencies of the interferometric oscillations used to calc

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Wang, Mengyuan, Yuye Ling, Zhenxing Dong, et al. "GPU-accelerated iterative method for FD-OCT image reconstruction with an image-level cross-domain regularizer." Optics Express 31, no. 2 (2023): 1813. http://dx.doi.org/10.1364/oe.478970.

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The image reconstruction for Fourier-domain optical coherence tomography (FD-OCT) could be achieved by iterative methods, which offer a more accurate estimation than the traditional inverse discrete Fourier transform (IDFT) reconstruction. However, the existing iterative methods are mostly A-line-based and are developed on CPU, which causes slow reconstruction. Besides, A-line-based reconstruction makes the iterative methods incompatible with most existing image-level image processing techniques. In this paper, we proposed an iterative method that enables B-scan-based OCT image reconstruction,

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42

Yang, Yinghui, Qiang Chen, Qian Xu, Yijun Zhang, Qi Yong, and Guoxiang Liu. "Coseismic surface deformation of the 2014 Napa earthquake mapped by Sentinel-1A SAR and accuracy assessment with COSMO-SkyMed and GPS data as cross validation." International Journal of Digital Earth 10, no. 12 (2017): 1197–213. http://dx.doi.org/10.1080/17538947.2017.1299806.

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43

Guo, Hengyang, Jinyun Guo, Zhouming Yang, et al. "On Satellite-Borne GPS Data Quality and Reduced-Dynamic Precise Orbit Determination of HY-2C: A Case of Orbit Validation with Onboard DORIS Data." Remote Sensing 13, no. 21 (2021): 4329. http://dx.doi.org/10.3390/rs13214329.

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Haiyang-2C (HY-2C) is a dynamic, marine-monitoring satellite that was launched by China and is equipped with an onboard dual-frequency GPS receiver named HY2_Receiver, which was independently developed in China. HY-2C was successfully launched on 21 September 2020. Its precise orbit is an important factor for scientific research applications, especially for marine altimetry missions. The performance of the HY2_Receiver is assessed based on indicators such as the multipath effect, ionospheric delay, cycle slip and data utilization, and assessments have suggested that the receiver can be used in

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44

Bennet, M.Anto, B. Thamilvalluvan, Priya C.A. Hema, B. Bhavani, and M. Shalini. "ANDROID BASED HOME AUTOMATION AND ENERGY CONSERVATION." International Journal on Smart Sensing and Intelligent Systems 10, no. 4 (2017). https://doi.org/10.21307/ijssis-2017-237.

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Wireless Sensor Network (WSN) consists of three main components: nodes, gateways, and software. The spatially distributed measurement nodes interface with sensors to monitor assets or their environment. In a WSN network the devices are connected to WSN nodes wherein the entire nodes uses Zigbee network to transfer the status of connected applications to a controller which controls the whole applications but the main drawback of Wireless sensor networks is its high interference, low coverage area and ability to control only low power devices. In order to overcome these drawbacks Android equippe

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Massimo Aranzulla and Giuseppe Puglisi. "GPS tomography tests for DInSAR applications on Mt. Etna." Annals of Geophysics 58, no. 3 (2015). http://dx.doi.org/10.4401/ag-6750.

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Abstract (sommario):

<p>Tropospheric artifacts of SAR images in a volcanic area like Mt. Etna cause ambiguity in the interpretation of deformations with such technique. It would be useful to measure the delay caused by tropospheric anomalies in synthetic aperture radar (SAR) satellite signals (phase of the back-scattered radar wave) that could be interpreted as deformation. From the delay estimated through the GPS data processing, the tropospheric tomography of electromagnetic waves refractivity, has been performed using the SIMULps12 software. The aim of this study was to perform software synthetic tests by

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Massimo, Aranzulla NA, and Puglisi NA Giuseppe. "GPS tomography tests for DInSAR applications on Mt. Etna." June 15, 2021. https://doi.org/10.4401/ag-6750.

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Abstract (sommario):

<p>Tropospheric artifacts of SAR images in a volcanic area like Mt. Etna cause ambiguity in the interpretation of deformations with such technique. It would be useful to measure the delay caused by tropospheric anomalies in synthetic aperture radar (SAR) satellite signals (phase of the back-scattered radar wave) that could be interpreted as deformation. From the delay estimated through the GPS data processing, the tropospheric tomography of electromagnetic waves refractivity, has been performed using the SIMULps12 software. The aim of this study was to perform software synthetic tests by

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47

Martín, Angel, Ana Belén Anquela, Sara Ibáñez, Carlos Baixauli, and Sara Blanc. "Python software to transform GPS SNR wave phases to volumetric water content." GPS Solutions 26, no. 1 (2021). http://dx.doi.org/10.1007/s10291-021-01190-3.

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Abstract (sommario):

AbstractThe global navigation satellite system interferometric reflectometry is often used to extract information about the environment surrounding the antenna. One of the most important applications is soil moisture monitoring. This manuscript presents the main ideas and implementation decisions needed to write the Python code to transform the derived phase of the interferometric GPS waves, obtained from signal-to-noise ratio data continuously observed during a period of several weeks (or months), to volumetric water content. The main goal of the manuscript is to share the software with the s

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Alser, Mohammed, Taha Shahroodi, Juan Gómez-Luna, Can Alkan, and Onur Mutlu. "SneakySnake: a fast and accurate universal genome pre-alignment filter for CPUs, GPUs and FPGAs." Bioinformatics, December 26, 2020. http://dx.doi.org/10.1093/bioinformatics/btaa1015.

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Abstract Motivation We introduce SneakySnake, a highly parallel and highly accurate pre-alignment filter that remarkably reduces the need for computationally costly sequence alignment. The key idea of SneakySnake is to reduce the approximate string matching (ASM) problem to the single net routing (SNR) problem in VLSI chip layout. In the SNR problem, we are interested in finding the optimal path that connects two terminals with the least routing cost on a special grid layout that contains obstacles. The SneakySnake algorithm quickly solves the SNR problem and uses the found optimal path to dec

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Alqahtani, Mohammed S., Rabbani Syed, Mudassar Shahid, Mohd Abul Kalam, Mukesh Goel, and R. Lakshmipathy. "Clerodendron phlomoides leaf extract-mediated synthesis of selenium nanoparticles for multi-applications." Green Processing and Synthesis 14, no. 1 (2025). https://doi.org/10.1515/gps-2025-0027.

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Abstract This study aimed at the green synthesis of selenium nanoparticles (SeNPs) using an aqueous extract of Clerodendron phlomoides leaves as both reducing and stabilizing agents. The success of SeNP synthesis was confirmed using various analytical characterization techniques such as UV-Vis, FTIR, XRD, SEM, and TEM techniques. The surface plasmon resonance (SPR) of SeNPs was observed at 325 nm, confirming their polycrystalline nature, while FTIR analysis revealed the presence of flavonoids on the surface of SeNPs that acted as reducing and stabilizing agents for nanoparticle formation. The

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Pal, Arghyadeep, Dilshad Ahmad, Srikanta Pal, and Abu Nasar Ghazali. "Efficient and low SAR dual functional wearable antenna in RFID ISM and GPS L1 bands for positioning applications." Wireless Networks, February 4, 2023. http://dx.doi.org/10.1007/s11276-023-03238-3.

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