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Letteratura scientifica selezionata sul tema "GPS timing receiver"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 19 febbraio 2022

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Articoli di riviste sul tema "GPS timing receiver"

Banerjee, P., D. Becker, K. H. Thiel e P. Hartl. "Timing experiment with geodetic GPS receiver". IEEE Transactions on Instrumentation and Measurement 43, n. 5 (1994): 700–705. http://dx.doi.org/10.1109/19.328899.

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Hassanien, Jasmien. "Multi-GNSS Software Receiver Design Optimization for Accuracy Improvement". International Journal for Research in Applied Science and Engineering Technology 9, n. 9 (30 settembre 2021): 1467–76. http://dx.doi.org/10.22214/ijraset.2021.38190.

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Abstract: Recently, tremendous research has been conducted on Global navigation satellite systems (GNSS) software receivers to better serve the current challenging environments that suffers from multipath fading. Therefore, the development of GNSS receivers has seen a new rush toward a multi-GNSS as a solution for fading problems. In this paper, a multi-GNSS software receiver is designed, optimized, and its performance is presented. The implemented software receiver covers three different signals from two GNSS constellations, namely GPS L1, GPS L2, and Galileo E1. In this paper. the fundamentals of stages of GNSS signal reception (acquisition, tracking, and navigation) are discussed where each stage is customized and optimized for each considered signal and the stage of mutli-GNSS data combination is optimized afterword. The performance of the optimized multi-GNSS software receiver is examined under different combination scenarios where the Least-Square Estimation (LSE) method using precise positioning (PP) algorithms is adopted. Results showed that using multi-GNSS receiver enhances the accuracy of Position, Velocity, and Timing (PVT) solution. Keywords: GNSS, PVT, GPS, Galileo, and accuracy

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MOSAVI, M. R. "GPS RECEIVERS TIMING DATA PROCESSING USING NEURAL NETWORKS: OPTIMAL ESTIMATION AND ERRORS MODELING". International Journal of Neural Systems 17, n. 05 (ottobre 2007): 383–93. http://dx.doi.org/10.1142/s0129065707001226.

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The Global Positioning System (GPS) is a network of satellites, whose original purpose was to provide accurate navigation, guidance, and time transfer to military users. The past decade has also seen rapid concurrent growth in civilian GPS applications, including farming, mining, surveying, marine, and outdoor recreation. One of the most significant of these civilian applications is commercial aviation. A stand-alone civilian user enjoys an accuracy of 100 meters and 300 nanoseconds, 25 meters and 200 nanoseconds, before and after Selective Availability (SA) was turned off. In some applications, high accuracy is required. In this paper, five Neural Networks (NNs) are proposed for acceptable noise reduction of GPS receivers timing data. The paper uses from an actual data collection for evaluating the performance of the methods. An experimental test setup is designed and implemented for this purpose. The obtained experimental results from a Coarse Acquisition (C/A)-code single-frequency GPS receiver strongly support the potential of methods to give high accurate timing. Quality of the obtained results is very good, so that GPS timing RMS error reduce to less than 120 and 40 nanoseconds, with and without SA.

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Straubmeier, Christian, e Gottfried Kanbach. "OPTIMA An Optical Pulsar Timing Analyser". International Astronomical Union Colloquium 177 (2000): 311–12. http://dx.doi.org/10.1017/s0252921100059844.

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AbstractOPTIMA is a small and mobile highspeed photometer which is primarily intended for the observation of young high energy pulsars at optical wavelengths. The detector system consists of a fiber fed photon counter based on avalanche photodiodes, a GPS timing receiver and an integrating CCD camera to ensure the correct positioning of the targeted object. In January 1999, OPTIMA proved its functionality by measuring the lightcurve of the Crab pulsar.

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Munghemezulu, C., L. Combrinck e O. J. Botai. "A case study of the application of GPS to lunar laser ranging timing systems". Journal of Applied Geodesy 12, n. 4 (25 ottobre 2018): 279–87. http://dx.doi.org/10.1515/jag-2018-0006.

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Abstract The Hartebeesthoek Radio Astronomy Observatory is currently building a Lunar Laser Ranging station. This geodetic technique requires a good timing system to measure a round trip of laser photons from the telescope to the Moon and back to the telescope. We test the newly acquired timing system using examples of the Global Positioning System applications. Data in Receiver Independent Exchange Format was processed using GAMIT/GLOBK software. The results were compared against those derived from the Global Positioning System receivers that were integrated with a frequency standard from a hydrogen maser and a standard internal quartz. The results indicate that (i) the rubidium clock operates optimally and the clock drifted to within error margins of sub-centimetre level during the period of 2.5 seconds, (ii) the selected site for the permanent installation of the timing antenna has minimal multipath effect and (iii) we observed no improvement in Global Positioning System products derived from receivers that were integrated with different frequency standards.

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Pitchumani, S. Naveen, S. Arun Sundar, T. Srinivasan e S. Savithri. "Mathematical Modelling of Indian Regional Navigation Satellite System Receiver". Defence Science Journal 67, n. 4 (30 giugno 2017): 443. http://dx.doi.org/10.14429/dsj.67.11547.

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<p class="p1">At present the armoured fighting vehicles are equipped with either global positioning system (GPS) receivers or integrated inertial navigation system (INS)/GPS navigation systems. During hostile situations, the denial/degradation of the GPS satellite signals may happen. This results in the requirement of an indigenous satellite based navigation system. Indian Space Research Organisation has developed an indigenous Indian regional navigation satellite system (IRNSS), with a seven satellite constellation to provide independent position, navigation and timing services over India and its neighbouring regions. In this paper, the development of IRNSS receiver using MATLAB as per IRNSS signal in space interface control document for standard positioning service is discussed. A method for faster IRNSS signal acquisition in frequency domain and delay locked loop code tracking for the acquired satellite signals are used. Models for navigation message decoding and pseudo range/user position calculations are developed using the algorithms provided in IRNSS ICD.</p>

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Spaans, Jac A. "GPS: The Holy Grail?" Journal of Navigation 53, n. 2 (maggio 2000): 293–97. http://dx.doi.org/10.1017/s0373463300008742.

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This paper was first presented at a workshop arranged by the Netherlands Institute of Navigation on 5 November 1999 at the Delft University of Technology, The Netherlands.The development and introduction of GPS in the early Eighties has led to an exponential growth in military and civilian applications. Worldwide, GPS is becoming a cornerstone in applications of transport, (offshore) survey, (precision) agriculture, network timing, military operations and many other applications. And yet, for a number of applications, GPS as sole-means or augmented – has some deficiencies, and its performance does not satisfy the user's requirements. Some of these deficiencies will be discussed in this paper. A number of maritime operations will be mentioned where (D)GPS as sole-means is considered by the author as unsafe navigational practice. Development and implementation of integrated navigation receivers using multiple navigation-signal sensors ((D)Galileo, (D)GPS, Eurofix, DR) using receiver autonomous integrity monitoring (RAIM) could solve the majority of the deficiencies of these systems in their stand-alone state.

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Doroshenko, O. V., Yu P. Ilyasov e V. V. Oreshko. "Pulsar timing at Kalyazin (Russia)". International Astronomical Union Colloquium 177 (2000): 57–60. http://dx.doi.org/10.1017/s0252921100059017.

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AbstractRegular timing observations of millisecond and binary pulsars are made with the 64-m radio telescope at Kalyazin (Russia). Filterbank 160-channel receiver is used for observations at 0.6 GHz in two circular orthogonal polarization. Precise local time service (based upon a rubidium standards and hydrogen maser) is used for measurements of Times-of-Arrival (TOA) from radio pulsars. A local time scale is compared by GPS and TV-systems with the basic AT-scales (UTC(USNO) and UTC(SU)) within an accuracy about 50nsper day. Recently the second 1.4 GHz receiver (250 kHz × 64 channels) was constructed and installed at Kalyazin radio telescope. There is a possibility to combine a part of the 1.4 GHz back-end with the 2.2 GHz front-end to produce timing observations at three frequencies simultaneously. We present a results of precise timing observations conducted by the Kalyazin pulsar system. Most of data were obtained at 0.6 GHz in 1997–1999. The data will be used for valuable applications in fundamental metrology, interstellar medium, general relativity and pulsar physics itself.

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Valk, M., H. H. G. Savenije, C. C. J. M. Tiberius e W. M. J. Luxemburg. "Determining slack tide with a GPS receiver on an anchored buoy". Hydrology and Earth System Sciences 18, n. 7 (11 luglio 2014): 2599–613. http://dx.doi.org/10.5194/hess-18-2599-2014.

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Abstract. In this paper we present a novel method to determine the time of occurrence of tidal slack with a GPS receiver mounted on an anchored buoy commonly used to delineate shipping lanes in estuaries and tidal channels. Slack tide occurs when the tide changes direction from ebb to flood flow or from flood to ebb. The determination of this point in time is not only useful for shipping and salvaging, it is also important information for calibrating tidal models, for determining the maximum salt intrusion and for the further refinement of the theory on tidal propagation. The accuracy of the timing is well within 10 min and the method – able to operate in real time – is relatively cheap and easy to implement on a permanent basis or in short field campaigns.

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Valk, M., H. H. G. Savenije, C. C. J. M. Tiberius e W. M. J. Luxemburg. "Determining slack tide with a GPS receiver on an anchored buoy". Hydrology and Earth System Sciences Discussions 10, n. 11 (14 novembre 2013): 13743–82. http://dx.doi.org/10.5194/hessd-10-13743-2013.

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Abstract. In this paper we present a novel method to determine the time of occurrence of tidal slack with a GPS receiver mounted on an anchored buoy commonly used to delineate shipping lanes in estuaries and tidal channels. Slack tide occurs when the tide changes direction from ebb to flood flow, or from flood to ebb. The determination of this point in time is not only useful for shipping and salvaging, it is also important information for calibrating tidal models, for determining the maximum salt intrusion and for the further refinement of the theory on tidal propagation. The accuracy of the timing is well within 10 min and the method – able to operate in real-time – is relatively cheap and easy to implement on a permanent basis or in short field campaigns.

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Più fonti

Tesi sul tema "GPS timing receiver"

Khan, Faisal Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Effects of interference on GPS timing receivers and their impacts on communications networks". Awarded by:University of New South Wales. Electrical Engineering & Telecommunications, 2007. http://handle.unsw.edu.au/1959.4/30201.

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The rapid evolution of current and upcoming high speed and complex communications networks often necessitates flawless time synchronization among the network nodes in order to guarantee performance. GPS based synchronizers have long been used for synchronizing telecommunications equipment, currently providing an accuracy of up to 10ns. Such high accuracy demands excellent operation from GPS timing receivers. Interference is an important threat to GPS performance. Any degradation in performance, due to the introduction of interference, can cause these receivers to provide a low quality timing solution, or to lose lock with incoming GPS signals altogether. This consideration motivates the study of the performance of GPS timing receivers in the presence of harmful interference. This work is devoted to the theoretical and practical investigations of the effects of RF interference on GPS-based synchronizers and their impacts on communications networks. Contributions made during this work include: a) Identification of the processes and the parameters involved in producing a timing solution which are vulnerable to interference; b) experimentbased confirmation of a hypothesis about the effects of interference on GPS timing receivers; c) identification of the effects of degraded synchronization on the performance of communications networks, especially CDMA and GSM cellular networks, which rely upon GPS based synchronizers; and d) proposal of a method to predict and avoid communications network performance degradation.

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Stieber, Marcel Colman Eric. "Radio Direction Finding Network Receiver Design for Low-cost Public Service Applications". DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/889.

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A low-cost radio direction finding (RDF) VHF receiver has been investigated for development into a radio direction finding network (RDFN) with a particular focus towards public service and commercial asset tracking applications. The primary design criteria were reproducibility, low-cost, and simplicity such that public service and volunteer organizations can benefit from the technology. Two receiver designs were built and tested to allow for comparison of practicality, cost, and accuracy. A pseudo-Doppler RDF and a time difference of arrival (TDOA) receiver were built as proof-of-concept for a system design based on commercial off-the-shelf (COTS) components. The pseudo-Doppler system is a less practical implementation due to the necessity for custom hardware, a large antenna system, and an increased directional error due to multipath and weak signals. The TDOA system has potential as a very simple and low-cost RDFN implementation, but requires extremely accurate time synchronization that is difficult to achieve using COTS GPS receiver modules. The final proposed solution takes advantage of the simple TDOA hardware and multiple detection techniques (including signal strength) to produce improved locational data and ultimately provide a more accurate estimate of position. Further development and improvements to this receiver design have the potential for implementation as a low-cost radio direction finding network.

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Libri sul tema "GPS timing receiver"

Zao, John Kar-kin. Carrier and timing signal synthesis for a codeless differential GPS receiver. 1987.

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Capitoli di libri sul tema "GPS timing receiver"

Zhu, Hehuan, Xiangyang Wu, Weirong Chen e Shuguo Pan. "Research of Precise Timing in Single Receiver Pseudorange Positioning Based on GPS System". In Lecture Notes in Electrical Engineering, 211–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37398-5_20.

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Atti di convegni sul tema "GPS timing receiver"

Hu, Hui, e Na Wei. "A Simulation for Positioning and Timing of GPS Software Receiver". In 2009 Third International Symposium on Intelligent Information Technology Application. IEEE, 2009. http://dx.doi.org/10.1109/iita.2009.479.

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Grunert, U., S. Thoelert, H. Denks e J. Furthner. "Using of spirent GPS/Galileo HW simulator for timing receiver calibration". In 2008 IEEE/ION Position, Location and Navigation Symposium. IEEE, 2008. http://dx.doi.org/10.1109/plans.2008.4570009.

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Li Gun, Wu Fu-ping, Wei Jing-fa e Huang Xian-he. "Development of High Precision and Multifunctional Timing System Using integrated GPS/BD Receiver". In 2008 IEEE International Frequency Control Symposium. IEEE, 2008. http://dx.doi.org/10.1109/freq.2008.4623051.

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Li, Xiaohui, Huijun Zhang, Shaohua Shi e Guoqiang Wang. "Measurement of the time delay of gps timing receiver based on UTC(NTSC)". In 2009 Joint Meeting of the European Frequency and Time Forum (EFTF) and the IEEE International Frequency Control Symposium (FCS). IEEE, 2009. http://dx.doi.org/10.1109/freq.2009.5168361.

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Heng, Liang, Jonathan J. Makela, Alejandro D. Dominguez-Garcia, Rakesh B. Bobba, William H. Sanders e Grace Xingxin Gao. "Reliable GPS-based timing for power systems: A multi-layered multi-receiver architecture". In 2014 IEEE Power and Energy Conference at Illinois (PECI). IEEE, 2014. http://dx.doi.org/10.1109/peci.2014.6804565.

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Mina, Tara Yasmin, Sriramya Bhamidipati e Grace Xingxin Gao. "Detecting GPS Spoofing via a Multi-Receiver Hybrid Communication Network for Power Grid Timing Verification". In 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018). Institute of Navigation, 2018. http://dx.doi.org/10.33012/2018.15904.

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Arceo-miquel, Luis. "Experimental evaluation of the tie of the crystal clock vs. gps timing receiver without/with the negative sawtooth correction". In 2006 Multiconference on Electronics and Photonics. IEEE, 2006. http://dx.doi.org/10.1109/mep.2006.335647.

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Rowe, Robert W., Peter J. Duffett-Smith, Murray R. Jarvis e Nicolas G. Graube. "Enhanced GPS: The tight integration of received cellular timing signals and GNSS receivers for ubiquitous positioning". In 2008 IEEE/ION Position, Location and Navigation Symposium. IEEE, 2008. http://dx.doi.org/10.1109/plans.2008.4570111.

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Qixiang Zhuang, W. J. Klepczynski e C. F. Lukac. "Positioning and Timing Study of GPS C/A Code Receivers". In 41st Annual Symposium on Frequency Control. IEEE, 1987. http://dx.doi.org/10.1109/freq.1987.201015.

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Shmaliy, Yuriy S., Luis Arceo-Miquel, Jorge Munoz-Diaz e Oscar Ibarra-Manzano. "Real-time Frequency Estimation of Local Oscillators Using GPS Timing Receivers". In 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum. IEEE, 2007. http://dx.doi.org/10.1109/freq.2007.4319082.

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