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Academic literature on the topic 'Geodetic reference frame'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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Journal articles on the topic "Geodetic reference frame"

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Ma, C., E. F. Arias, T. M. Eubanks, A. L. Fey, A. M. Gontier, C. S. Jacobs, and O. J. Sovers. "Formation of The International Celestial Reference Frame." Highlights of Astronomy 11, no. 1 (1998): 281–86. http://dx.doi.org/10.1017/s153929960002075x.

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The goal of the work described here is to create the definitive catalogue for the new International Celestial Reference Frame (ICRF) using the best data and methods available at the time the work was done. This work is the joint cooperative effort of a subgroup of the IAU Working Group on Reference Frames which was formed expressly for this purpose in February 1995. The authors of this report constituted the subgroup. A fuller account of this report can be found in the introduction to the ICRF catalog (IERS 1997).The ICRF of 608 sources presented here is based on essentially all the VLBI observations accu-mulated over about 15 years in several worldwide programs. Dual frequency Mark III data have both geodetic and astrometric applications. Most of the data (95% of nearly 2 million observations) were acquired primarily for geodetic purposes. The major geodetic programs include: NASA’s Crustal Dynamics Project/Space Geodesy Program and USNO’s NAVEX sessions for the terrestrial reference frame, as well as IRIS, NAVNET and NEOS sessions for monitoring Earth rotation. The geodetic programs have used the brightest radio sources, gradually concentrating on the most com-pact as sensitivity improved. These geodetic sources were also the foundation of astrometric work because of the large number of observations for the ~150 most commonly used. The astrometric programs which densify the sky include the Radio-Optical Reference Frame sessions done by US Naval Research Laboratory (NRL) and USNO and the space navigation efforts of Jet Propulsion Laboratory (JPL).

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Bovshin, N. A. "High-precision GNSS-positioning in GSK-2011 reference frame." Geodesy and Cartography 944, no. 2 (March 20, 2019): 2–14. http://dx.doi.org/10.22389/0016-7126-2019-944-2-2-14.

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The paper deals with a high-precision geodetic network densification by means of GNSS based geodetic solutions, in the view of the fact that the initial data are represented in different reference frames. Indeed, reference station positions are represented in GSK-2011 terrestrial reference frame whereas GNSS satellites` ephemeris are represented in other reference frames, such as ITRFs, WGS84, etc. Two methods are considered in the paper to provide GNSS observations with a correct processing procedure

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Doukas, Ioannis D., Dimitrios Ampatzidis, and Vassileios Kampouris. "THE VALIDATION OF THE TRANSFORMATION BETWEEN AN OLD GEODETIC REFERENCE FRAME AND A MODERN REFERENCE FRAME, BY USING EXTERNAL SPACE TECHNIQUES SITES: THE CASE STUDY OF THE HELLENIC GEODETIC REFERENCE SYSTEM OF 1987." Boletim de Ciências Geodésicas 23, no. 3 (September 2017): 434–44. http://dx.doi.org/10.1590/s1982-21702017000300029.

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Abstract: Many of the old geodetic reference frames which realized in the previous decades using classical observations carry biases. These biases are mainly caused due to the problematic observations and/or the tectonic motion. That is the case of the official Greek geodetic reference frame which consists of classical and satellite observations. Herein, we present a rigorous approach of the reconstruction of the Greek official reference frame based on the modern geodetic reference frames and their ability to express the spatial position and the dynamic change of the stations. We applied the rigorous approach to ninety stations located in Greece and we compare it with the officially accepted procedure. We found a consistency at 59.4cm between the rigorous and the officially accepted approaches, respectively. The associated mean bias estimation was estimated at 51.4 cm, indicating the resistance of a rather large amount of systematic effects. In addition, the observed discrepancies between the two approaches show great inhomogeneity all over the country.

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Kim, Su-Kyung, and Tae-Suk Bae. "Long-Term GNSS Analysis for Local Geodetic Datum After 2011 Tohoku Earthquake." Journal of Navigation 71, no. 1 (October 2, 2017): 117–33. http://dx.doi.org/10.1017/s0373463317000595.

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The current Korean national geodetic reference frame, KGD2002, refers to the fixed epoch at 2002·0 under the assumption that there is no crustal movement of the Korean peninsula. A discontinuity in the coordinates of the reference stations may occur due to the relocation of the stations, antenna replacement, or earthquakes. The static reference frame has difficulty in covering continuous and/or discontinuous crustal movements at the same time. A new dynamic local geodetic reference frame has been calculated based on eight years (2007–2014) of Global Navigation Satellite System (GNSS) data. The final geodetic coordinates and velocities were calculated on the basis of the IGb08 reference frame. The discontinuity caused by the 2011 Tohoku earthquake can be addressed using the newly proposed model in this study, which ensures the consistency and continuity of the local geodetic datum.

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Smith, David E., Demos C. Christodoulidis, Ron Kolenkiewicz, Peter J. Dunn, Steven M. Klosko, Mark H. Torrence, S. Fricke, and S. Blackwell. "A global geodetic reference frame from LAGEOS ranging (SL5.1AP)." Journal of Geophysical Research 90, B11 (1985): 9221. http://dx.doi.org/10.1029/jb090ib11p09221.

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Cannavò, Flavio, and Mimmo Palano. "Defining Geodetic Reference Frame using Matlab®: PlatEMotion 2.0." Pure and Applied Geophysics 173, no. 3 (June 9, 2015): 937–44. http://dx.doi.org/10.1007/s00024-015-1112-z.

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Papadopoulos, Nestoras, Melissinos Paraskevas, Ioannis Katsafados, Georgios Nikolaidis, and Euagelos Anagnostou. "Deformation detection through the realization of reference frames." Journal of Applied Geodesy 14, no. 2 (April 26, 2020): 133–48. http://dx.doi.org/10.1515/jag-2019-0056.

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AbstractHellenic Military Geographical Service (HMGS) has established and measured various networks in Greece which constitute the geodetic infrastructure of the country. One of them is the triangulation network consisting of about 26.000 pillars all over Greece. Classical geodetic measurements that held by the Hellenic Military Geographic Service (HMGS) through the years have been used after adjustment for the state reference frame which materializes the current Hellenic Geodetic Reference System of 1987 (HGRS87). The aforementioned Reference System (RS) is a static one and is in use since 1990. Through the years especially in the era of satellite navigation systems many Global Navigation Satellite System (GNSS) networks have been established. The latest such network materialized by HMGS is ongoing and covers until now more than the 2/3 of the country. It is referenced by International GNSS Service (IGS) permanent stations and consists a local densification IGS08 Reference Frame. Firstly, this gives the opportunity to calculate transformation parameters between the two systems and a statistical analysis of the residuals leads to intermediate conclusions. After that and in conjunction with existing past transformations, tectonic deformations and their directions are concluded. Moreover past GPS observations on the same pillars in compare to the newer ones give also a sense of tectonic displacements. Greece is one of the most tectonically active countries in Europe and the adoption of a modern kinematic or semi-kinematic geodetic datum is a necessity as it should incorporate a deformation model like 3d velocities on the reference frame realization. The detection of geodynamic changes is a continuous need and should be taken into consideration at each epoch.

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Lösler, Michael, Cornelia Eschelbach, and Stefan Riepl. "A modified approach for automated reference point determination of SLR and VLBI telescopes." tm - Technisches Messen 85, no. 10 (October 25, 2018): 616–26. http://dx.doi.org/10.1515/teme-2018-0053.

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AbstractThe International Terrestrial Reference Frame (ITRF) is derived by combining several space geodetic techniques. Basically, a meaningful combination of the geodesic space techniques is impossible without further geometrical information, i. e. local-ties. Local-tie vectors are defined between the geometrical reference points of space geodetic techniques at co-location stations. These local-ties are introduced during the inter-technique combination process, to overcome the weak physical connection between the space geodetic techniques. In particular, the determination of the reference point of radio telescopes or laser telescopes is a challenging task and requires indirect methods. Moreover, the Global Geodetic Observing System (GGOS) strives for an automated and continued reference point determination with sub-millimeter accuracy, because deviations in local-ties bias global results.This investigation presents a modified approach for automated reference point determination. The new approach extends the prior work of Lösler but evades the synchronization between the terrestrial instrument and the telescope. Thus, synchronization errors are omitted and the technical effort is reduced. A proof of concept was carried out at Geodetic Observatory Wettzell in 2018. Using a high-precision, mobile laser-tracker, the reference point of the Satellite Observing System Wettzell (SOS-W) was derived. An extended version of the in-house developed software package HEIMDALL was employed for a mostly automated data collection. To evaluate the estimated reference point, the derived results are compared with the results of two approved models.

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Ayodele, E. G., C. J. Okolie, C. U. Ezeigbo, and F. A. Fajemirokun. "Evaluating the Stability and Adequacy of NIGNET for the Definition of Nigerian Geodetic Reference Frame." Nigerian Journal of Technological Development 17, no. 1 (April 22, 2020): 1–12. http://dx.doi.org/10.4314/njtd.v17i1.1.

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A set of Continuously Operating Reference Stations (CORS) distributed all over Nigeria constitutes the Nigerian GNSS Reference Network referred to as NIGNET. Global Navigation Satellite System (GNSS) is a system tha uses satellites for autonomous position determination, and is a critical component of the modern-day geodetic infrastructure and services. Using CORS provide geodetic controls of comparable accuracy and a better alternative to the classical geodetic network. As the NIGNET infrastructure is utilised for different geodetic applications, it has become necessary to evaluate the suitability of the network data for the definition of a geodetic reference frame (GRF). This study utilised the technique of Precise Point Positioning (PPP) in position estimation, and time series analysis for temporal monitoring of the network. The sufficiency and adequacy of the NIGNET data archive was also evaluated against that of an International GNSS Service (IGS) Station. The temporal stability of the station coordinates measured in terms of standard deviations varied between 10 mm and 22 mm. This analysis suggests a relative stability required for Tiers 1 and 2 CORS in line with the IGS standards. Based on this reported stability, it is concluded that NIGNET is fit for purpose in defining the Nigerian Geodetic Reference Frame. However, despite the good data quality observed, the adequacy of the network has been compromised by infrastructural failures and lack of continuity in data transmission. Accordingly, it is recommended that both practical and policy measures required to ensure the realisation of the goal of the network should be implemented. Keywords: Geodetic reference frame, NIGNET, CORS, precise point positioning, temporal stability and adequacy.

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Bovshin, N. A. "On perfecting the employment of GSK-2011 reference frame in the Far East territory." Geodesy and Cartography 951, no. 9 (October 20, 2019): 2–9. http://dx.doi.org/10.22389/0016-7126-2019-951-9-2-9.

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ITRFs and ITRF like reference frames have a drawback that limits or makes its wide use difficult while surveying in the Russian Federation. These are significant velocities of changing geodetic stations’ coordinates throughout the entire territory. It leads to necessity of reducing reference geodetic stations and survey points positions from reference epoch to observation ones and vice versa. To avoid this necessity for the most of surveys in the Russian Federation territory, a transformation model [1] of relative behaviour of GSK-2011 and ITRF-2014 reference frames was created. Unfortunately, the model does not work properly in the Far East. That is why in this paper a new, regional transformation model that represent relative behaviour of GSK-2011 and ITRF-2014 reference frames in the territory was described. As it was shown in the paper, the result is equivalent to setting a new, auxiliary version of GSK-2011 reference frame in the Far East territory – GSK-2011-FE, that has no drawbacks of ITRF-like systems. Both frames coincide with each other at the reference epoch t0 and relate by a transformation of angular motion at an epoch t.

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Dissertations / Theses on the topic "Geodetic reference frame"

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König, Daniel [Verfasser], and B. [Akademischer Betreuer] Heck. "Determining a Terrestrial Geodetic Reference Frame Following the Integrated Approach of Space Geodesy / Daniel König. Betreuer: B. Heck." Karlsruhe : KIT-Bibliothek, 2013. http://d-nb.info/1044956119/34.

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Njoroge, Mary Wambui. "Is Nubia Plate Rigid? A Geodetic Study of the Relative Motion of Different Cratonic Areas within Africa." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/6003.

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The Nubia plate is normally considered to be a rigid plate and as such used in the realization of terrestrial reference frame. Gondwana breakup plate reconstruction, the Cameroon volcanic line, seismicity, and the morphology of the Okavango rift zone (ORZ) suggest the presence of internal deformation within the Nubia plate. To test this hypothesis, six different reference frames were developed from the velocity field of three individual regions (West, Central and South), and of different combinations of them (West+Central, South+Central, and Nubia as a whole). The residual velocities with respect to these references frame help us understand the presence of the relative motion between the different regions thus the stability of the plate. To realize the reference frames, all the publicly available global positioning system (GPS) data within the “stable” Nubia plate was processed. Given the small relative velocity, it is important to eliminate eventual biases in the analysis and to have good estimates of uncertainty of the observed velocities. For this reason, velocities were analyzed, and rate uncertainties computed using the Allan variance of rate (AVR) technique, accounting for colored noise. Although geological and geophysical studies indicate the possibility of internal deformation within Nubia, the results of this study shows that the current GPS network is not capable to identify intraplate deformation and within uncertainties Nubia is a single plate. As final note, both the color of the noise and the amplitude of the annual signal of each time series as function of latitude and climatic region were analyzed. The study shows that the noise is approximately flicker for all the good stations independently of the location. On the contrary, the amplitude of the annual signal is strongly dependent on the climate of the regions.

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Lösler, Michael, Torsten Lossin, Alexander Neidhardt, and Rüdiger Lehmann. "Untersuchung zur automatisierten Bestimmung des IVS-Referenzpunktes am TWIN Radioteleskop Wettzell." Hochschule für Technik und Wirtschaft Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:520-qucosa-159760.

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Die Verknüpfung von geodätischen Raumtechniken wie GNSS, DORIS, SLR oder VLBI zur Ableitung eines geodätischen Referenzrahmens wie dem ITRF gelingt erst durch sogenannte Kolokationsstationen. Die geometrischen Beziehungen zwischen den betriebenen Raumtechniken sind dabei aus präzisen lokalen Vermessungen abzuleiten. Es wird ein Konzept zur automatisierten Bestimmung des IVS-Referenzpunktes am TWIN Radioteleskop Wettzell vorgestellt. Erste Untersuchungsergebnisse werden präsentiert.

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Lösler, Michael, Torsten Lossin, Alexander Neidhardt, and Rüdiger Lehmann. "Untersuchung zur automatisierten Bestimmung des IVS-Referenzpunktes am TWIN Radioteleskop Wettzell." Hochschule für Technik und Wirtschaft Dresden, 2014. https://htw-dresden.qucosa.de/id/qucosa%3A23284.

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Die Verknüpfung von geodätischen Raumtechniken wie GNSS, DORIS, SLR oder VLBI zur Ableitung eines geodätischen Referenzrahmens wie dem ITRF gelingt erst durch sogenannte Kolokationsstationen. Die geometrischen Beziehungen zwischen den betriebenen Raumtechniken sind dabei aus präzisen lokalen Vermessungen abzuleiten. Es wird ein Konzept zur automatisierten Bestimmung des IVS-Referenzpunktes am TWIN Radioteleskop Wettzell vorgestellt. Erste Untersuchungsergebnisse werden präsentiert.

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Caccamise, Dana John II. "Geodetic and Oceanographic Aspects of Absolute versus Relative Sea-Level Change." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1543357751520828.

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Abbondanza, Claudio <1977&gt. "Local Ties, VLBI-GPS eccentricities and Combination of Geodetic Reference Frames: a critical investigation applied to the co-located observatory of Medicina." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1174/.

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Chen, Lu-An, and 陳律安. "Relative Precision Analysis of Taiwan Geodetic Control Station between Different International Terrestrial Reference Frame." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/27170502061245808888.

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碩士
國立中興大學
土木工程學系所
104
Since 2012, TWD97 has been adopted as the Geodetic Datum in Taiwan. The epoch was set at 2010.0 and the ITRF94 was retained as the legal reference frame. The original survey was performed under ITRF2005. The results were converted to ITRF94 through secondary frame transformation and used as the current legal reference frame in Taiwan. For determining the influences that the secondary frame transformation of original survey results has on the relative precision of Taiwan geodetic control station, the present study adopted the following three analysis methods: (1) a difference analysis on the lengths of the baselines between datum stations after frame transformation; (2) an analysis of the standard deviation of the baselines between datum stations after frame transformation; and (3) an establishment and analysis of disposable frame transformation parameters. The findings indicated that following secondary frame transformation, the baseline length with the largest discrepancy between the original survey results was that between Matsu and Kenting (MZUM-KDNM baseline).The discrepancy of the baseline was only 0.06 cm. The root mean square error (RMSE) of the various baseline lengths was approximately 0.03 cm. The baseline length with the greatest deviation was the baseline between Taimali and the Port of Kaohsiung (TMAM-KASH baseline) at approximately 0.04 cm. Although the systematic error in the coordinate values was exhibited during the establishment of the disposable frame transformation parameters, specifically, a 3D deviant of 7.39 cm, the RMSE was only ±0.18 cm and the baseline length with the maximum deviation was only 0.02 cm. A data analysis of the research results revealed that the influence of different frame transformations on the relative position of the stations was minor. No problems with the drop in relative precision were observed between the new and old frame transformations. Further, the establishment and analysis of the disposable frame transformation parameters showed no significant influences on the relative positions of the various stations.

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Books on the topic "Geodetic reference frame"

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Drewes, Hermann, ed. Geodetic Reference Frames. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3.

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Bruijne, Arnoud de, and Gert Brand. De geodetische referentiestelsels van Nederland: Definitie en vastlegging van ETRS89, RD en NAP en hun onderlinge relaties = Geodetic reference frames in the Netherlands : definition and specification of ETRS89, RD and NAP, and their mutual relationships. Delft: Nederlandse Commissie voor Geodesie, 2005.

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Geodetic Reference Frames Iag Symposium Munich Germany 914 October 2006. Springer, 2009.

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Geophysical Studies Related to Geodetic Reference Frames (Ad A220 249/Ll). Natl Technical Information, 1990.

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Drewes, Hermann. Geodetic Reference Frames: IAG Symposium Munich, Germany, 9-14 October 2006. Springer, 2014.

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Deruelle, Nathalie, and Jean-Philippe Uzan. Riemannian manifolds. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786399.003.0042.

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This chapter introduces the Riemann tensor characterizing curved spacetimes, and then the metric tensor, which allows lengths and durations to be defined. As shown in the preceding chapter, ‘absolute, true, and mathematical’ spacetimes representing ‘relative, apparent, and common’ space and time in Einstein’s theory are Riemannian manifolds supplied with a metric and its associated Levi-Civita connection. Moreover, this metric simultaneously describes the coordinate system chosen to reference the events. The chapter begins with a study of connections, parallel transport, and curvature; the commutation of derivatives, torsion, and curvature; geodesic deviation and curvature; the metric tensor and the Levi-Civita connection; and locally inertial frames. Finally, it discusses Riemannian manifolds.

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Book chapters on the topic "Geodetic reference frame"

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Altamimi, Z. "The International Terrestrial Reference Frame (ITRF2005)." In Geodetic Reference Frames, 81–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_12.

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Bruyninx, C., Z. Altamimi, C. Boucher, E. Brockmann, A. Caporali, W. Gurtner, H. Habrich, et al. "The European Reference Frame: Maintenance and Products." In Geodetic Reference Frames, 131–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_20.

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Martínez, W. A., and L. Sánchez. "Realization of the SIRGAS Reference Frame in Colombia." In Geodetic Reference Frames, 185–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_29.

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Freymueller, J. T. "Seasonal Position Variations and Regional Reference Frame Realization." In Geodetic Reference Frames, 191–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_30.

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Bosy, J., B. Kontny, and A. Borkowski. "IGS/EPN Reference Frame Realization in Local GPS Networks." In Geodetic Reference Frames, 197–203. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_31.

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Schaffrin, B., and A. Wieser. "Empirical Affine Reference Frame Transformations by Weighted Multivariate TLS Adjustment." In Geodetic Reference Frames, 213–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_33.

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Gambis, D., R. Biancale, T. Carlucci, J. M. Lemoine, J. C. Marty, G. Bourda, P. Charlot, et al. "Combination of Earth Orientation Parameters and Terrestrial Frame at the Observation Level." In Geodetic Reference Frames, 3–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_1.

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Herring, T. A., Z. Altamimi, H. P. Plag, and P. Poli. "The future geodetic reference frame." In Global Geodetic Observing System, 225–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02687-4_8.

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Meisel, B., D. Angermann, and M. Krügel. "Influence of Time Variable Effects in Station Positions on the Terrestrial Reference Frame." In Geodetic Reference Frames, 89–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_14.

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Bizouard, Christian, and Daniel Gambis. "The Combined Solution C04 for Earth Orientation Parameters Consistent with International Terrestrial Reference Frame 2005." In Geodetic Reference Frames, 265–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_41.

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Conference papers on the topic "Geodetic reference frame"

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Schlueter, Wolfgang, Hayo Hase, and Armin Boeer. "TIGO: a geodetic observatory for the improvement of the global reference frame." In Remote Sensing, edited by Ulrich Schreiber and Christian Werner. SPIE, 1999. http://dx.doi.org/10.1117/12.373022.

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Sindoni, Giampiero, Claudio Paris, Cristian Vendittozzi, Erricos C. Pavlis, Ignazio Ciufolini, and Antonio Paolozzi. "The Contribution of LARES to Global Climate Change Studies With Geodetic Satellites." In ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/smasis2015-8924.

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Satellite Laser Ranging (SLR) makes an important contribution to Earth science providing the most accurate measurement of the long-wavelength components of Earth’s gravity field, including their temporal variations. Furthermore, SLR data along with those from the other three geometric space techniques, Very Long Baseline Interferometry (VLBI), Global Navigation Satellite Systems (GNSS) and DORIS, generate and maintain the International Terrestrial Reference Frame (ITRF) that is used as a reference by all Earth Observing systems and beyond. As a result we obtain accurate station positions and linear velocities, a manifestation of tectonic plate movements important in earthquake studies and in geophysics in general. The “geodetic” satellites used in SLR are passive spheres characterized by very high density, with little else than gravity perturbing their orbits. As a result they define a very stable reference frame, defining primarily and uniquely the origin of the ITRF, and in equal shares, its scale. The ITRF is indeed used as “the” standard to which we can compare regional, GNSS-derived and alternate frames. The melting of global icecaps, ocean and atmospheric circulation, sea-level change, hydrological and internal Earth-mass redistribution are nowadays monitored using satellites. The observations and products of these missions are geolocated and referenced using the ITRF. This allows scientists to splice together records from various missions sometimes several years apart, to generate useful records for monitoring geophysical processes over several decades. The exchange of angular momentum between the atmosphere and solid Earth for example is measured and can be exploited for monitoring global change. LARES, an Italian Space Agency (ASI) satellite, is the latest geodetic satellite placed in orbit. Its main contribution is in the area of geodesy and the definition of the ITRF in particular and this presentation will discuss the improvements it will make in the aforementioned areas.

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Odalovic, Oleg. "TRANSFORMATION OF CLASSICAL GEODETIC CONTROL NETWORKS 7TO INTERNATIONAL TERESTRICAL REFERENCE FRAME BY TRANSFORMATION GRIDS." In 13th SGEM GeoConference on INFORMATICS, GEOINFORMATICS AND REMOTE SENSING. Stef92 Technology, 2013. http://dx.doi.org/10.5593/sgem2013/bb2.v2/s09.066.

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Glaser, Susanne, Grzegorz Michalak, Rolf Konig, Benjamin Mannel, and Harald Schuh. "Future GNSS Infrastructure for Improved Geodetic Reference Frames." In 2020 European Navigation Conference (ENC). IEEE, 2020. http://dx.doi.org/10.23919/enc48637.2020.9317460.

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Cabanes, Jose Luis, Federico Iborra-Bernad, and Carlos Bonafé-Cervera. "Reconstrucción virtual de ambientes urbanos a partir de fotografías históricas a través de Image Based Animations (IBA). La Plaza de la Virgen de Valencia alrededor de 1870." In 24th ISUF 2017 - City and Territory in the Globalization Age. Valencia: Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.6055.

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Reconstrucción virtual de ambientes urbanos a partir de fotografías históricas a través de Image Based Animations (IBA). La Plaza de la Virgen de Valencia alrededor de 1870. Jose Luis Cabanes Ginés¹, Federico Iborra Bernad², Carlos Bonafé Cervera3 ¹Departamento de Expresión Gráfica Arquitectónica. Universidad Politécnica de Valencia. Caminio de Vera s/n 46022 Valencia. 2Departamento de Composición Arquitectónica. Universidad Politécnica de Valencia. Caminio de Vera s/n 46022 Valencia 3Departamento de Ing. Cartográf. Geodesia y Fotogramtría. Universidad Politécnica de Valencia. Caminio de Vera s/n 46022 Valencia E-mail: jlcabane@ega.upv.es, f_iborra@yahoo.es, carboce1@topo.upv.es Keywords (3-5): virtual reconstruction, historical urban environment, image based animations Conference topics and scale: City transformations / Tools of analysis in urban morphology The recreation of the historical environment of emblematic urban spaces in our cities through interactive technologies, allows to extend their knowledge among the interested users while contributing to its assessment. When the documentary bases are photographs it is possible to carefully model the recorded elements using photogrammetry techniques based on 3D primitives, so that by means of an immersive navigation limited to certain points of view, an appearance of acceptable tridimensionality is obtained, where only isolated images of dispersed frames are available. The virtual recreation can be completed increasing its realistic appearance through its edition with animations of objects (for example, carriages) and characters, texts, musical setting, etc. The results can be presented in formats such as video or navigation through virtual reality helmets. From a selection of the first historical photographs of the Plaza de la Virgen, that we have obtained searching in several documentary sources, our multidisciplinary team is interested in a reliable, realistic and pleasant presentation of the urban environment of one of the most representative places in the city of Valencia, whose spatial configuration has changed significantly over the years. References (100 words) Braun, C., Kolbe, T. H., Lang, F., Schickler, W., Steinhage, V., Cremers, A. B., Förstner, W., Plümer, L., 1995. Models for photogrammetric building reconstruction. Computers & Graphics, Volume 19, Issue 1, pp. 109-118. Debevec, P., Taylor, C. J. and Malik, J., 1996. Modeling and rendering architecture from photographs: A hybrid geometry and image-based approach. SIGGRAPH’96, pp. 11–20. De Mesa, A., Regot, J., Nuñez, M. A. and Buill, F., (2009). Métodos y procesos para el levantamiento de reconstrucción tridimensional gráfica de elementos del patrimonio cultural. La iglesia de Sant Sever de Barcelona. Revista EGA, nº 14, pp. 82-89. Drap, P., Grussenmeyer, P. and Gaillard, G., 2001. Simple Photogrammetric Methods with ARPENTEUR: 3-D Plotting and Orthoimage generation. XVIII International Symposium CIPA 2001, Potsdam (Germany). International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, nº 34 (Part 5/C7), pp. 47-54. El-Hakim, S., Beraldin, J. and Lapointe, A., 2002. Towards Automatic Modeling of Monuments and Towers. IEEE Proceedings of the International Symposium on 3D Data Processing Visualization and Transmission, 3DPVT 2002, Padua, Italy, pp. 526-531. Proyecto Barcelona Darrera Mirada, http://darreramirada.ajuntament.barcelona.cat/#historia/8/1 The Old New York, http://vimeo.com/160024074, https://vimeo.com/162572088

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