Relevant bibliographies by topics / Antenna phase centre variation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Antenna phase centre variation'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Antenna phase centre variation"

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Araszkiewicz, Andrzej, Damian Kiliszek, and Anna Podkowa. "Height Variation Depending on the Source of Antenna Phase Centre Corrections: LEIAR25.R3 Case Study." Sensors 19, no. 18 (September 17, 2019): 4010. http://dx.doi.org/10.3390/s19184010.

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In this study, we compared two sets of antenna phase center corrections for groups of the same type of antenna mounted at the continuously operating global navigation satellite system (GNSS) reference stations. The first set involved type mean models provided by the International GNSS Service (release igs08), while the second set involved individual models developed by Geo++. Our goal was to check which set gave better results in the case of height estimation. The paper presents the differences between models and their impact on resulting height. Analyses showed that, in terms of the stability of the determined height, as well as its variability caused by increasing the facade mask, both models gave very similar results. Finally, we present a method for how to estimate the impact of differences in phase center corrections on height changes.
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Dawidowicz, Karol, Rafal Kazmierczak, and Krzysztof Swiatek. "SHORT STATIC GPS/GLONASS OBSERVATION PROCESSING IN THE CONTEXT OF ANTENNA PHASE CENTER VARIATION PROBLEM." Boletim de Ciências Geodésicas 21, no. 1 (March 2015): 213–30. http://dx.doi.org/10.1590/s1982-217020150001000014.

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So far, three methods have been developed to determine GNSS antenna phase center variations (PCV). For this reason, and because of some problems in introducing absolute models, there are presently three models of PCV receiver antennas (relative, absolute converted and absolute) and two satellite antennas (standard and absolute). Additionally, when simultaneously processing observations from different positioning systems (e.g. GPS and GLONASS), we can expect a further complication resulting from the different structure of signals and differences in satellite constellations. This paper aims at studying the height differences in short static GPS/GLONASS observation processing when different calibration models are used. The analysis was done using 3 days of GNSS data, collected with three different receivers and antennas, divided by half hour observation sessions. The results show that switching between relative and absolute PCV models may have a visible effect on height determination, particularly in high accuracy applications. The problem is especially important when mixed GPS/GLONASS observations are processed. The update of receiver antenna calibrations model from relative to absolute in our study (using LEIAT504GG, JAV_GRANT-G3T and TPSHIPER_PLUS antennas) induces a jump (depending on the measurement session) in the vertical component within to 1.3 cm (GPS-only solutions) or within 1.9 cm (GPS/GLONASS solutions).
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EL-Hattab, Ahmed I. "Influence of GPS antenna phase center variation on precise positioning." NRIAG Journal of Astronomy and Geophysics 2, no. 2 (December 2013): 272–77. http://dx.doi.org/10.1016/j.nrjag.2013.11.002.

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Krietemeyer, Andreas, Hans van der Marel, Nick van de Giesen, and Marie-Claire ten Veldhuis. "High Quality Zenith Tropospheric Delay Estimation Using a Low-Cost Dual-Frequency Receiver and Relative Antenna Calibration." Remote Sensing 12, no. 9 (April 28, 2020): 1393. http://dx.doi.org/10.3390/rs12091393.

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The recent release of consumer-grade dual-frequency receivers sparked scientific interest into use of these cost-efficient devices for high precision positioning and tropospheric delay estimations. Previous analyses with low-cost single-frequency receivers showed promising results for the estimation of Zenith Tropospheric Delays (ZTDs). However, their application is limited by the need to account for the ionospheric delay. In this paper we investigate the potential of a low-cost dual-frequency receiver (U-blox ZED-F9P) in combination with a range of different quality antennas. We show that the receiver itself is very well capable of achieving high-quality ZTD estimations. The limiting factor is the quality of the receiving antenna. To improve the applicability of mass-market antennas, a relative antenna calibration is performed, and new absolute Antenna Exchange Format (ANTEX) entries are created using a geodetic antenna as base. The performance of ZTD estimation with the tested antennas is evaluated, with and without antenna Phase Center Variation (PCV) corrections, using Precise Point Positioning (PPP). Without applying PCVs for the low-cost antennas, the Root Mean Square Errors (RMSE) of the estimated ZTDs are between 15 mm and 24 mm. Using the newly generated PCVs, the RMSE is reduced significantly to about 4 mm, a level that is excellent for meteorological applications. The standard U-blox ANN-MB-00 patch antenna, with a circular ground plane, after correcting the phase pattern yields comparable results (0.47 mm bias and 4.02 mm RMSE) to those from geodetic quality antennas, providing an all-round low-cost solution. The relative antenna calibration method presented in this paper opens the way for wide-spread application of low-cost receiver and antennas.
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Wang, Chaochao, Gérard Lachapelle, and M. Elizabeth Cannon. "Development of an Integrated Low-Cost GPS/Rate Gyro System for Attitude Determination." Journal of Navigation 57, no. 1 (January 2004): 85–101. http://dx.doi.org/10.1017/s0373463303002583.

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The use of low-cost GPS receivers and antennas for attitude determination can significantly reduce the overall hardware system cost. Compared to the use of high performance GPS receivers, the carrier phase measurements from low-cost equipment are subject to additional carrier phase measurement errors, such as multipath, antenna phase centre variation and noise. These error sources, together with more frequent cycle slip occurrences, severely deteriorate attitude determination availability, reliability and accuracy performance. This paper presents the investigation of a low-cost GPS/gyro integration system for attitude determination. By employing the dead reckoning sensor type, the ambiguity search region can be specifically defined as a small cube to enhance the ambiguity resolution process. A Kalman filter is implemented to fuse the rate gyro data with GPS carrier phase measurements. The quality control system based on innovation sequences is used to identify cycle slip occurrences and incorrect inter-antenna vector solutions. The availability of the integrated system also improves with respect to the GPS standalone system since the attitude parameters can be estimated using the angular rate measurements from rate gyros during GPS outages. The low-cost hardware used to design and test the integrated system consists of CMC Allstar receivers with the OEM AT575-70 antennas and Murata ENV-05D-52 piezoelectric vibrating rate gyroscopes. Tests in the urban area demonstrated that the introduction of rate gyros in a GPS-based attitude determination system not only effectively decreased the noise level in the estimated attitude parameters but coasted the attitude output during GPS outages and also significantly improved the system reliability.
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Baghel, Amit Kumar, Shashank Kulkarni, and Sisir Kumar Nayak. "Parabolic profile pyramidal horn antenna with lower phase centre variation and 3 dB beamwidth in S‐band." IET Microwaves, Antennas & Propagation 13, no. 10 (June 5, 2019): 1626–36. http://dx.doi.org/10.1049/iet-map.2018.5824.

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Willi, Daniel, Michael Meindl, Hui Xu, and Markus Rothacher. "GNSS antenna phase center variation calibration for attitude determination on short baselines." Navigation 65, no. 4 (December 2018): 643–54. http://dx.doi.org/10.1002/navi.273.

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Stępniak, Katarzyna, Paweł Wielgosz, and Radosław Baryła. "Field tests of L1 phase centre variation models of surveying-grade GPS antennas." Studia Geophysica et Geodaetica 59, no. 3 (March 23, 2015): 394–408. http://dx.doi.org/10.1007/s11200-014-0250-6.

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Gu, Defeng, Yuwang Lai, Junhong Liu, Bing Ju, and Jia Tu. "Spaceborne GPS receiver antenna phase center offset and variation estimation for the Shiyan 3 satellite." Chinese Journal of Aeronautics 29, no. 5 (October 2016): 1335–44. http://dx.doi.org/10.1016/j.cja.2016.08.016.

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Li, Bin, Yong Luo, Xu Tan, Xiao Ning Zhang, and Jian Jun Wu. "Phase Distribution Analysis of Radiation Pattern of Multi-Beam Satellite Antenna Based on Offset Parabolic Reflector." Advanced Materials Research 846-847 (November 2013): 663–66. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.663.

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This paper focuses on GEO multi-beam satellite offset parabolic reflector antenna. In this paper, radiation fields generated by different feeds are derived, and phase radiation pattern is mainly discussed. It can be seen from the numerical results that when the feed is at the focal point of parabolic reflector, the beam has equal phase within beam service area. In addition, for offset feeds, phase changes slowly from beam center to beam boundary, and the variation is about 0.1 radian.
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Dissertations / Theses on the topic "Antenna phase centre variation"

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Johnston, Gary Michael, and n/a. "GPS heighting : the effect of the GPS antenna phase center variation on height determination." University of Canberra. Management & Technology, 2000. http://erl.canberra.edu.au./public/adt-AUC20060802.155533.

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This thesis examines the effect on height determination of the antenna phase centre variation of GPS user segment antennae. A discussion of the various antenna types in common use is followed by an explanation of the problem at hand. In particular the effect of the antenna's environment on the phase centre variation is covered more fully, since the phase variation phenomenon itself is largely unexplained in the engineering community to date. A number of examples of the heighting errors caused by this phenomenon are presented, followed by specifically designed experiments, which quantify the effect. Finally the phase centre variation itself is modelled for a particular GPS antenna in common use by surveyors in Australia. The overall conclusion, arrived at by demonstration, is that the antenna phase centre offsets and the variation model are very important for high accuracy determinations of height.
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Crawford, Justin Luvene. "Impacts of Station Dependent Error Sources on the Implementation of the National Height Modernization Program." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1385972294.

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Ménudier, Cyrille. "Caractérisation des performances d’antennes à réflecteurs paraboliques illuminées par une source focale BIE : application à l’optimisation d’une couverture multimédia multi-faisceaux." Limoges, 2007. https://aurore.unilim.fr/theses/nxfile/default/b4c850a8-8764-4e21-b926-0dda8386e3df/blobholder:0/2007LIMO4038.pdf.

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L’antenne BIE à défaut multi-sources peut être une solution de substitution aux sources focales existantes ou conçues actuellement pour les antennes à réflecteurs dédiées aux télécommunications spatiales haut débit. En diminuant le nombre de focaliseurs, la solution reposant sur l’antenne BIE permettrait de réduire la masse, l’encombrement et bien sûr, le coût du satellite. Les performances de ce type de source focale n’ont cependant pas été caractérisées. Cette étude est l’objet de ce mémoire. Après avoir présenté un état de l’art des systèmes de télécommunications spatiales multifaisceaux, nécessaire pour appréhender les propriétés de ces dispositifs, un outil de calcul de performances a été développé. Il est ensuite appliqué à la caractérisation de l’antenne BIE à défaut pour mettre en avant ses différents potentiels. Cette étude a permis une amélioration significative des performances de la source focale et aussi de mettre en place une méthode de conception, qui manquait jusqu’ici. Les résultats obtenus, très satisfaisants, ont ensuite été validés par la réalisation d’un prototype
The multisources EBG antenna with defect may be an alternative solution to classical focal feed dedicated to high data rate coverage with reflector antennas onboard satellite. By reducing the number of reflectors, the EBG antenna can decrease the satellite weight and cost. However, its performances must be studied before concluding on its interest. This is the aim of this thesis. After presenting a state of the art of multibeam solution for space telecommunications, a software developed to characterize these performances is presented. It has been used to determine the EBG antenna focal feed advantages and drawbacks. Then, a useful design method is presented. As good performances have been obtained, a prototype has been realized to validate all these results
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Shen, Yi-Ching, and 沈逸晴. "Precise Orbit Determination of FORMOSA-3/COSMIC and GRACE: effects of attitude, antenna phase center variation and mass center." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/zj8pbh.

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碩士
國立交通大學
土木工程系所
96
The Bernese 5.0 software is used to compute the precise orbits of the FORMOSAT-3 and GRACE satellites using the kinematic and reduced-dynamic methods based on zero-differenced GPS phases from these two satellites missions. This study concentrates on the effects of satellite attitude, GPS antenna phase center variation (PCV) and center of mass (COM). The RMS differences between the orbits computed with observed and with nominal attitudes are about one cm; such orbit differences may reach 10 cm in the case of low-quality attitude observations. In the case of reduced dynamic orbit determination, the 3D RMS differences between the orbits computed with the original COM values and the biased COM values are less than the given COM biases, and this is attributed to the pseudo-stochastic pulse parameters that partly absorb such biases, whereas in the case of kinematic orbit determination, such orbit differences are almost equal to the given COM biases. Based on 5-hour orbit overlaps in the radial, along-track and cross-track directions, the improvement due to use of PCV is at the sub-cm level for both kinematic and reduced dynamic orbit determinations. The most significant improvement with PCV is in the radial direction. For both the kinematic and reduced dynamic approaches, the 3D overlapping differences between the orbits with and without PCV are 0.82 and 1.89 cm, respectively. The reduced dynamic orbit is more sensitive to changes in attitude, COM and PCV than the kinematic orbit. In general, the effect of attitude on orbit is larger than the effects of COM and PCV. The attitude data and control of the FORMOSAT-3 satellites are improved as the orbits are raised to higher altitudes.
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Mohamed, Abdelhalim Mohamed Mamdouh. "Performance enhancement of ultra wideband antennas for communication and microwave imaging applications." 2012. http://hdl.handle.net/1993/5078.

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This thesis investigates omnidirectional and directional ultra wideband (UWB) antennas for communication and microwave imaging applications. To reduce interference with existing technologies, monopole antennas with efficient band-stop functions are introduced. Single and double slots acting as series resonators are used. Reduction in the antenna gain in the stop-band regions of about 19.5 dB is achieved. Central metal removal and ground plane size effects on the antenna performance are investigated. To eliminate signal distortion caused by such monopole antennas, phase centre behaviour over the entire frequency band of operation is investigated at different principle planes, which have not been done before. This study will also show how these antennas act in different communication scenarios and where the radiation will be coming from at different frequencies. The effect of including different slots with different shapes on the performance of phase centre of these antennas is also investigated. Different methods to minimize the antenna phase centre movement are studied. Novel microstrip antennas with UWB impedance and radiation pattern bandwidth and low cross polarization components are introduced to work over the frequency band from 3 to 20 GHz. The antennas introduced are double-layer structures in which the radiator is sandwiched between two identical partial ground planes or a partial ground plane is sandwiched between two radiators. Results show a significant reduction in the cross polarization components at all frequencies. A novel high gain UWB Vee dipole antenna with a UWB coaxial balun feed is introduced to cover the existing and future UWB communication applications. Different type of loadings such as a reflecting ground below the antenna, a dielectric sleeve over the UWB balun and conical dielectrics between the Vee plates are also used and studied that show enhanced gains and lower sidelobes. A miniaturized-type UWB Vee dipole antenna is also investigated for microwave imaging applications. The antenna has a small radiation aperture which makes it a good candidate for array type applications. Full wave analysis of studied antennas are done using Ansoft HFSS, finite-element-methods based software. Experimental investigations are done to confirm the accuracy of simulated results.
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Book chapters on the topic "Antenna phase centre variation"

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Kaniuth, Klaus. "Exploiting the SIRGAS Colocations for Determining Elevation Dependent Phase Center Variations of Geodetic GPS Antennas." In Advances in Positioning and Reference Frames, 289–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03714-0_46.

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Sidorov, D., and F. N. Teferle. "Impact of Antenna Phase Centre Calibrations on Position Time Series: Preliminary Results." In International Association of Geodesy Symposia, 117–23. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/1345_2015_216.

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"Appendix B: Antenna Phase Characteristics and Evaluation of Phase Centre Stability." In Antennas for Global Navigation Satellite Systems, 211–13. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781119969518.app2.

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Conference papers on the topic "Antenna phase centre variation"

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Yoon, Sungpil, HyungJin Rim, and Bob Schutz. "Phase Center Variation Modeling of ICESat GPS Antenna for Precision Orbit Determination." In AIAA/AAS Astrodynamics Specialist Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-4879.

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Willi, Daniel, Michael Meindl, Hui Xui, and Markus Rothacher. "GNSS Antenna Phase Center Variation Calibration for Attitude Determination on Short Baselines." In 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017). Institute of Navigation, 2017. http://dx.doi.org/10.33012/2017.15411.

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Liu, Ran, and Daniel N. Aloi. "An empirical study of the relative phase center variation of a ceramic patch antenna for automotive applications." In 2018 IEEE/ION Position, Location and Navigation Symposium (PLANS). IEEE, 2018. http://dx.doi.org/10.1109/plans.2018.8373435.

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Dawidowicz, Karol, Grzegorz Krzan, Radosław Baryła, and Krzysztof Swiatek. "The Impact of GNSS Antenna Mounting during Absolute Field Calibration on Phase Center Correction – JAV_GRANT-G3T Antenna Case Study." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.183.

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The phase center corrections (PCC) of an GNSS antenna can be precisely determined using the absolute field calibration procedure with a precise robot. Using the Hannover’s automated absolute antenna field calibration technique developed by the Institute of Geodesy (University of Hannover) and Geo++ we demonstrate that the way of antenna mounting on the robot (distance from mechanical structures mounted underneath the antennas) can cause significant changes in the phase center offset and variations. For both the GPS and the GLONASS carrier signals L1 and L2 these changes are in the order of several millimeters. e also analyzed how these changes transfer to the coordinate domain. We investigated the differences between position estimates obtained using two different, individual and type-mean, elevation dependent PCC. There days of GNSS observations on very short baseline were used for these studies. The position time-series were derived using the RTKLib software package. We found that that the differences in the calibrations models propagate directly into the position domain, affecting sub-daily results and giving visible periodic variations in solutions. The best agreement with the “true position” we obtained using PCC from the individual calibrations.
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Dong, Yunhan. "A new adaptive displaced phase centre antenna processor." In 2008 International Conference on Radar (Radar 2008). IEEE, 2008. http://dx.doi.org/10.1109/radar.2008.4653944.

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Pour, Z. Allahgholi, and L. Shafai. "Adaptive aperture antennas with adjustable phase centre locations." In 2012 IEEE International Workshop on Antenna Technology "Small Antennas and Unconventional Applications" (iWAT). IEEE, 2012. http://dx.doi.org/10.1109/iwat.2012.6178685.

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Song, Li-Wei, and Fei Zheng. "Study on the Feeds Phase Centre of Distorted Reflector Antenna." In 4th Asia International Symposium on Mechatronics. Singapore: Research Publishing Services, 2010. http://dx.doi.org/10.3850/978-981-08-7723-1_p095.

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Elsherbini, Adel, Cemin Zhang, Song Lin, Michael Kuhn, Aladin Kamel, Aly E. Fathy, and Hadia Elhennawy. "UWB antipodal vivaldi antennas with protruded dielectric rods for higher gain, symmetric patterns and minimal phase center variations." In 2007 IEEE Antennas and Propagation Society International Symposium. IEEE, 2007. http://dx.doi.org/10.1109/aps.2007.4395909.

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Allahgholi Pour, Z., and Lotfollah Shafai. "An overview of latest advancements in displaced phase centre antenna (DPCA) techniques." In 2013 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium). IEEE, 2013. http://dx.doi.org/10.1109/usnc-ursi.2013.6715328.

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Allahgholi Pour, Z., and Lotfollah Shafai. "Displacement of phase centre location of a tri-mode stacked circular microstrip patch antenna." In 2012 15th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM). IEEE, 2012. http://dx.doi.org/10.1109/antem.2012.6262356.

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