Relevant bibliographies by topics / Ephemerides

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Academic literature on the topic 'Ephemerides'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "Ephemerides"

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Standish, E. M. "The Dynamical Reference Frame." Symposium - International Astronomical Union 166 (1995): 109–16. http://dx.doi.org/10.1017/s0074180900227939.

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Planetary and lunar ephemerides continue to improve in accuracy as they continue to be adjusted to newer and more accurate observational data. An additional improvement will be that of the orientation of the ephemerides; in the future, the ephemerides produced at JPL will be based upon the reference frame of the radio source catalogues. Recent planetary observations have been made directly with respect to the radio reference frame, and these observations have shown a satisfying degree of absolute accuracy and internal consistency; they enable the automatic orientation of the ephemerides onto the radio reference system during the ephemeris adjustment process.
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Xi, X. J., and A. Vienne. "Analytical representation for ephemeride with short time spans." Astronomy & Astrophysics 635 (March 2020): A91. http://dx.doi.org/10.1051/0004-6361/201937148.

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Context. The ephemerides of natural satellites resulting from numerical integration have a very good precision on the fitting to recent observations, in a limited interval. Meanwhile, synthetic ephemerides like the Théorie Analytique des Satellites de Saturne (TASS) by Vienne and Duriez describe in detail the dynamical system by a representation based on the combinations of the proper frequencies. Some theoretical studies need to have both advantages. For example, to study the rotation of Titan, one needs to know the representation of its longitude. Aims. We aim to use these two types of ephemerides in order to rebuild a long-lasting and high-precision ephemeris with proper frequencies based on the numerical integration ephemeris. The aim is to describe the numerical ephemerides with formulas similar to analytical ones. Methods. We used the representation of the orbital elements from the TASS ephemeris analysed over 10 000 years as a reference template. We obtained the proper frequencies with both numerical and the TASS ephemeris over 1000 years only. A least-square procedure allowed us to get the analytical representation of an orbital element in this limited interval. Results. We acquire the representation of the mean longitude of Titan from JPL ephemeris over 1000 years. For almost all components, the corresponding amplitudes and phases are similar to the relative terms from TASS. The biggest difference between our representation and the mean longitude of Titan of JPL is less than 100 km over 1000 years, and the standard deviation is about 26 km.
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Fukushima, Toshio, George H. Kaplan, George A. Krasinsky, Jean Eudes Arlot, John A. Bangert, Catherine Y. Hohenkerk, George A. Krasinsky, et al. "COMMISSION 4: EPHEMERIDES." Proceedings of the International Astronomical Union 4, T27A (December 2008): 5–11. http://dx.doi.org/10.1017/s1743921308025234.

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JPL planetary ephemeris development has been very active assimilating measurements from current planetary missions and supporting future missions. The NASA Mars Science Laboratory (MSL) mission with launch in 2009 requires knowledge of the Earth and Mars ephemerides with 30m accuracy. By comparison, the accuracy of the Mars ephemeris in the widely used DE405 ephemeris was about 3 km. Meeting the MSL needs requires an ongoing program of range and very-long baseline interferometry measurements of Mars orbiting spacecraft. The JPL ephemeris DE421 was released three months before the landing of the Phoenix mission on Mars, and has met the 300m requirement. Continued measurements are planned to support the MSL landing.
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Lee, H. S., W. A. Wan Aris, T. A. Musa, and A. Ahmad. "ASSESSING EFFICIENCY OF GPS EPHEMERIDES IN DIFFERENT REGION USING PRECISE POINT POSITIONING." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-4/W6-2022 (February 7, 2023): 195–99. http://dx.doi.org/10.5194/isprs-archives-xlviii-4-w6-2022-195-2023.

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Abstract. Precise Point Positioning (PPP) is a technique that process Global Positioning System (GPS) observation that can achieve sub-decimetre accuracy. Precise ephemerides that contain satellite clock and position plays a vital role in minimising orbital and clock error in PPP. This study hypothesize that the efficiency of ephemerides varies across region, influenced by the density of stations involved in generating the ephemerides. GPS observations from stations in five different regions were processed using PPP technique by using RTKLIB. Four types of ephemerides were used namely broadcast, ultra-rapid, rapid, and final ephemerides during the processing of each station. Root-mean-squared error (RMSE) of 3D error of the PPP solution for the stations in each region is quantified. Among the five regions selected, Europe has the lowest RMSE of 155.67 cm, 27.93 cm, 27.38 cm and 27.06 cm for broadcast, ultra-rapid, rapid, and final ephemeris respectively. This high accuracy can be attributed to the density of International GNSS Service (IGS) stations in Europe that are available for the generation of ephemerides. Position Dilution of Precision (PDOP) was also found to contribute to the accuracy of PPP solution in a region, whereby a low PDOP often promises higher positioning accuracy. More regional stations are suggested to be involved in the generation of ephemerides to improve the efficiency of ephemerides in that region.
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Deng, Yongtao, and Shuanggen Jin. "Effect of Ephemeris on Pulsar Timing and Navigation Accuracy Based on X-ray Pulsar Navigation-I Data." Universe 8, no. 7 (June 27, 2022): 360. http://dx.doi.org/10.3390/universe8070360.

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Solar system ephemeris is very important for pulsar timing and navigation. In order to explore the effect of different precision ephemerides on X-Ray pulsar timing and navigation, the differences between timing and navigation results with four JPL Development Ephemerides based on the data of x-ray pulsar navigation-I (XPNAV-I) were compared and analyzed in this paper. For pulsar timing, the ephemeris has a systematic effect on time scale conversion (nanosecond difference), light-travel delay (millisecond difference) and timing residuals (microsecond difference), and the pulse profile phase can reflect the systematic deviation caused by different ephemerides in the timing calculation. The timing results show that it is necessary to compile the pulsar timing model based on the newer ephemeris. For navigation, based on the significant enhancement of pulse profile with orbit-dynamic (SEPO), the absolute error between simulation orbit and actual orbit is less than 2 km for each ephemeris, and the differences between simulation orbits are less than 1 km. The orbit position accuracy calculated by the ephemeris used in pulsar timing parameter calculation is the highest (DE200 in this paper), which explains the necessity of using a unified ephemeris in the calculation of timing and navigation with satisfying its internal self-consistency.
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Standish, E. Myles. "Numerical planetary and lunar ephemerides: present status, precision and accuracies." Symposium - International Astronomical Union 114 (1986): 71–83. http://dx.doi.org/10.1017/s0074180900148016.

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The Ephemeris Development Program has been in existence for nearly 20 years at JPL, providing high precision present-day knowledge of the positions of the moon and major planets. The resultant ephemerides are used extensively in the navigation of spacecraft and in the reduction of astrometric observations. They also provide a key element in the testing of various theories of gravitation and a means for the determination of various relevant astronomical constants. The ephemerides and the process of creating them are both shown to be viable tools for the measurement of various gravitational effects which govern the motions of the objects in the solar system.This paper gives an outline of the least-squares adjustment of the ephemerides to the observations, the present physical (dynamical) model, the present observations to which the ephemerides are fit, the expected accuracies of various ephemeris elements, recent and future observations and features of the solar system which are poorly determined (and thereby place limits upon the accuracies). Recent comparisons with similar work at the Center for Astrophysics (formerly at MIT) are serving as valuable independent checks on formulations and procedures used at each institution; they also lend insight toward what are the realistic accuracies being attained. The export procedure, by which an outside user may obtain and use the JPL ephemerides, is described.
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Morando, B., P. K. Seldelmann, V. K. Abalakin, S. Aokl, J. Chapront, R. L. Duncombe, T. Lederle, J. H. Lieske, B. D. Yallop, and A. Yamazaki. "4. Ephemerides (Ephemerides)." Transactions of the International Astronomical Union 20, no. 1 (1988): 1–6. http://dx.doi.org/10.1017/s0251107x00006854.

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This report covers the period from 1 July 1984 to 30 June 1987. The ephemerides that have been published during this period have made use of the new system of astronomical constants adopted at the XVIth General Assembly of the lAU in Grenoble. Yet some difficulties have arisen because of the lack of catalogues or maps of the heavens established for the epoch J2000.0. This is awkward for observers of comets and minor planets and, for that reason, Commission 20 decided, at the New Delhi meeting of lAU that there would be a gradual introduction of the J2000.0 system as far as those bodies are concerned.
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Emelyanov, N. V., M. I. Varfolomeev, and V. Lainey. "New ephemerides of outer planetary satellites." Monthly Notices of the Royal Astronomical Society 512, no. 2 (March 24, 2022): 2044–50. http://dx.doi.org/10.1093/mnras/stac586.

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ABSTRACT Ephemerides of planetary satellites require regular updates to take into account new observations of the satellites. Such revision has been all the more necessary in the case of outer planetary satellites, since a number of new moons have been discovered recently. Thus, we present updated versions of the ephemerides of the outer planetary satellites. The problem and the methodology for estimating ephemeris accuracy are discussed. Comparison with the Jet Propulsion Laboratory (JPL) ephemerides proves that the accuracy depends largely on the distribution of the observations. We give examples where, for a few satellites, the O−C residuals increase sharply at time intervals lying significantly beyond the time interval of observations used to generate the ephemerides. This fact alone indicates that there is an urgent need for new observations. Besides the ephemerides of moons, which can be accessed online via the MULTI-SAT server, we provide orbital parameters for the recently discovered faint satellites of Jupiter and Saturn. The problems discussed in this work are important for planning space observations of the outer satellites by future space missions like the European Space Agency (ESA) JUpiter ICy moons Explorer (JUICE) and National Aeronautics and Space Administration (NASA) Europa Clipper missions.
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Krasinsky, George, Toshio Fukushima, J. Chapront, E. M. Standish, C. Hohenkerk, G. Kaplan, P. K. Seidelmann, J. Bangert, S. Urban, and J. Vondrak. "Commission 4: Ephemerides." Proceedings of the International Astronomical Union 1, T26A (December 2005): 3–6. http://dx.doi.org/10.1017/s1743921306004285.

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JPL continues to be active in creating ephemerides in support of spacecraft navigation as well as various other functions. Many of the products are available on web sites: (a) “Horizons”, the interactive web site, updated on an hourly basis, is located at http://ssd.jpl.nasa.gov. As of August, 2005, it contains orbital elements and ephemerides for the sun and 9 planets, 150 natural satellites (including the Moon), 291, 655 asteroids, 1631 comets, and 34 Spacecraft. Horizons uses the full precision of the JPL DE405.(b)JPL's Planetary and Lunar Ephemerides in “export” format are available via FTP from the Internet: ftp://ssd.jpl.nasa.gov/pub/eph/export/ or on a CD-ROM: http://www.willbell.com/software/jpl.htm We advise to read the attached README.(c)The observational data used in fitting the planetary ephemerides is available at the following web site, updated periodically: http://ssd.jpl.nasa.gov/plan-eph-data/(d)SPICE Toolkit is a subroutine package for experienced programmers who write their own main driving programs for astrometrical computations. SPICE is available at http://naif.jpl.nasa.gov/. It contains a large library of subroutines useful in reading SPICE format ephemeris files (SPK) and in computing many solar system observation geometry parameters associated with the various JPL solar system missions. Available in Fortran, C, and IDL for most popular computing platforms.
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Mariani, V., O. Minazzoli, A. Fienga, J. Laskar, and M. Gastineau. "Bayesian test of Brans–Dicke theories with planetary ephemerides: Investigating the strong equivalence principle." Astronomy & Astrophysics 682 (February 2024): A175. http://dx.doi.org/10.1051/0004-6361/202348082.

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Aims. We are testing the Brans–Dicke class of scalar tensor theories with planetary ephemerides. Methods. In this work, we apply our recently proposed Bayesian methodology to the Brans–Dicke case, with an emphasis on the issue of the strong equivalence principle (SEP). Results. We use an MCMC approach coupled to full, consistent planetary ephemeris construction (from point-mass body integration to observational fit) and compare the posterior distributions obtained with and without the introduction of potential violations of the SEP. Conclusions. We observe a shift in the confidence levels of the posteriors obtained. We interpret this shift as marginal evidence that the effect of violation of the SEP can no longer be assumed to be negligible in planetary ephemerides with the current data. We also notably report that the constraint on the Brans–Dicke parameter with planetary ephemerides is getting closer to the figure reported from the Cassini spacecraft alone, and also to the constraints from pulsars. We anticipate that data from future spacecraft missions, such as BepiColombo, will significantly enhance the constraints based on planetary ephemerides.
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Dissertations / Theses on the topic "Ephemerides"

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VANDIKE, JOHN LAWRENCE. "A FLEXIBLE FRAMEWORK FOR EPHEMERIDES CALCULATIONS." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1132145140.

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Andreoli, Francesca. "Improvement of Jupiter's satellites ephemerides using stellar occultation observations." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18030/.

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The inner Galilean moons orbiting Jupiter are locked into the so-called “Laplace resonance”, where the orbital periods of Ganymede, Europa and Io maintain a 4:2:1 ratio respectively. Resonant dynamics appear several times across the Solar System and determining whether the Jovian resonance is deepening or loosening would provide a direct insight into the origin and the evolution of the Solar System. At the moment, our knowledge of the Galilean moons' dynamics is not accurate enough to establish in which direction the system is evolving. Including stellar occultation observations obtained from an orbiting spacecraft could result in a critical improvement of these estimations. Since the spacecraft’s orbit and the stars’ position are generally very well known, every time one of the moons crosses the line-of-sight from the spacecraft to the star its position can be constrained very accurately. The results of this thesis lay the foundations for the introduction of stellar occultation observations in the orbit determination process of planetary satellites and other celestial bodies. First, a geometrical/mathematical model of the distance between the moon’s limbs and a given star detected in its surroundings was developed and tested. Afterwards, a code to detect and archive all the stellar occultation events in a given time span was implemented. Finally, a parametric covariance analysis was performed to obtain a preliminary assessment of the improvements provided by the introduction of stellar occultation observations and investigate the influence of each variable on the orbit determination problem.
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Vandike, John L. "A flexible framework for the calculation of satellite ephemerides." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1132145140.

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Castellani, Daniele. "Estimation of the satellite ephemerides of Saturn using optical navigation pictures of Cassini." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20765/.

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The goal of this dissertation thesis is the estimation of the Saturnian satellites ephemerides using optical data of Cassini. In the first part we describe the software employed for the reduction of the images showing its main features and the accuracy that can be achieved comparing the results with published astrometry. Afterwards we describe the orbit determination problem (ODP) with particular focus on the weights selection for the estimation process. The third chapter describes the dynamical model used and the sources of potential errors in the residuals. The model have been validated trying to replicate JPL's published ephemerides SAT365, SAT375, SAT389 and SAT409. The final part investigates the residuals and the estimated ephemerides with particular focus on the giant moon Titan, the only in the solar system with an atmosphere other than the Earth. No astrometry have been retrieved in literature of Titan using optical observables, thus this represents one of the first investigations of the giant.
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Gomez, Casajus Luis Antonio <1990&gt. "Development of methods for the global ephemerides estimation of the gas giant satellite systems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/9006/1/GomezCasajus_Luis_tesi.pdf.

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The satellite systems of Saturn and Jupiter are complex dynamical systems, with several interactions happening between the central body, its rings and the natural satellites. During the last two decades, unmanned probes allowed to study the gas giant satellite systems. The three most relevant spacecrafts to their study have been Galileo, Cassini and Juno. Galileo studied the Jupiter system, the primary body and the main moons during 8 years, despite the failure on the deployment of its high gain antenna that limited the science retrieval. Cassini, analogously, studied during most of the 13 years of its mission, the natural satellites, paying specific attention to Titan. Then, in 2017 both Cassini and Juno spacecrafts were used to carry out gravity measurements of Saturn and Jupiter. Both spacecraft were inserted into similar, almost polar, highly eccentric orbits with low pericenter altitudes. Tracking the motion of the probes during pericenter passes from the DSN enabled the retrieval of the gravity field of both gas giants at an unprecedented level of accuracy. These results provide constraints on the interiors of the gas giants, but also, on the satellite system ephemerides which, analogously, hold information on the properties and evolution of both the satellites themselves and the central body. The main aim of this project is to study and characterize the key dynamics that rule the gas giant satellite systems using an improved gravity field of the central body, estimated using radio tracking data of deep space probes. To accomplish our objective, we performed the data analysis of the previously mentioned deep space missions: Cassini, Juno and Galileo. Being the three probes the very first orbiters of gas giant planets, they provided, and still provide, precious information which contributes to unveil the gas giant satellite systems dynamics, their origin and evolution.
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Verma, Ashok Kumar. "Improvement of the planetary ephemerides using spacecraft navigation data and its application to fundamental physics." Thesis, Besançon, 2013. http://www.theses.fr/2013BESA2030/document.

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Les éphémérides planétaires jouent un rôle important pour la navigation des missions spatiales actuelles et la mise en place des missions futures ainsi que la réduction et l'analyse des observations astronomiques les plus précises. Les éphémérides planétaires actuelles (DE, INPOP, EPM)L'objectif de la thèse est d'utiliser des archives de données de missions spatiales passées et présentes et de fournir des outils d'analyse pour l'amélioration de l'éphéméride de données pour l'amélioration de l’éphéméride planétaire planétaire INPOP, ainsi que pour une meilleure utilisation des éphémérides pour effectuer des teste de la physique tels que la relativité générale, les études de la couronne solaire [...]
The planetary ephemerides play a crucial role for spacecraft navigation, mission planning, reductionand analysis of the most precise astronomical observations. The construction of suchephemerides is highly constrained by the tracking observations, in particular range, of the spaceprobes collected by the tracking stations on the Earth. The present planetary ephemerides (DE,INPOP, EPM) are mainly based on such observations. However, the data used by the planetaryephemerides are not the direct raw tracking data, but measurements deduced after the analysisof raw data made by the space agencies and the access to such processed measurements remainsdifficult in terms of availability.The goal of the thesis is to use archives of past and present space missions data independentlyfrom the space agencies, and to provide data analysis tools for the improvement of theplanetary ephemerides INPOP, as well as to use improved ephemerides to perform tests ofphysics such as general relativity, solar corona studies, etc.The first part of the study deals with the analysis of the Mars Global Surveyor (MGS)tracking data as an academic case for understanding. The CNES orbit determination softwareGINS was used for such analysis. The tracking observations containing one-, two-, and threewayDoppler and two-way range are then used to reconstruct MGS orbit precisely and obtainedresults are consistent with those published in the literature. As a supplementary exploitationof MGS, we derived the solar corona model and estimated the average electron density alongthe line of sight separately for slow and fast wind regions. Estimated electron densities arecomparable with the one found in the literature. Fitting the planetary ephemerides, includingadditional data which were corrected for the solar corona perturbations, noticeably improves theextrapolation capability of the planetary ephemerides and the estimation of the asteroid masses(Verma et al., 2013a).The second part of the thesis deals with the complete analysis of the MESSENGER trackingdata. This analysis improved the Mercury ephemeris up to two order of magnitude comparedto any latest ephemerides. Such high precision ephemeris, INPOP13a, is then used to performgeneral relativity tests of PPN-formalism.[...]
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Thackrey, Keith R. "A geometric approach to determination of satellite ephemeris over a limited area." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43058.

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Range and,interferometric observations have been examined for their potential, application in a geometric approach to determination of satellite ephemeri. The approach differs from the normal (dynamic) approach in that each satellite position is treated as an independent state variable or benchmark. Programs have been developed that simulate and format the input, data for the least squares estimation routines, and perform statistical analyses of those results. Random error, tropospheric refraction errors, and atomic clock errors have been considered, and the range observation adjustment program directed to solve for clock errors.
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Magnanini, Andrea. "Estimation of the ephemerides and gravity fields of the Galilean moons through orbit determination of the JUICE mission." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21497/.

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Jupiter and its moons are a complex dynamical system that include several phenomenon like tides interactions, moon's librations and resonances. One of the most interesting characteristics of the Jovian system is the presence of the Laplace resonance, where the orbital periods of Ganymede, Europa and Io maintain a 4:2:1 ratio respectively. It is interesting to study the role of the Laplace Resonance in the dynamic of the system, especially regarding the dissipative nature of the tidal interaction between Jupiter and its closest moon, Io. Numerous theories have been proposed regarding the orbital evolution of the Galilean satellites, but they disagree about the amount of dissipation of the system, therefore about the magnitude and the direction of the evolution of the system, mainly because of the lack of experimental data. The future JUICE space mission is a great opportunity to solve this dispute. JUICE is an ESA (European Space Agency) L-class mission (the largest category of missions in the ESA Cosmic Vision) that, at the beginning of 2030, will be inserted in the Jovian system and that will perform several flybys of the Galilean satellites, with the exception of Io. Subsequently, during the last part of the mission, it will orbit around Ganymede for nine months, with a possible extension of the mission. The data that JUICE will collect during the mission will have an exceptional accuracy, allowing to investigate several aspects of the dynamics the system, especially, the evolution of Laplace Resonance of the Galilean moons and its stability. This thesis will focus on the JUICE mission, in particular in the gravity estimation and orbit reconstruction of the Galilean satellites during the Jovian orbital phase using radiometric data. This is accomplished through an orbit determination technique called multi-arc approach, using the JPL's orbit determination software MONTE (Mission-analysis, Operations and Navigation Tool-kit Environment).
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Bonaldo, Rodrigo Bragio. "Comemorações e efemérides : ensaio episódico sobre a história de dois paralelos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/114415.

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“Comemorar efemérides” não é apenas uma expressão legítima utilizada para fazer referência à celebração de uma festa nacional. Desde o final do século XIX, ao menos em língua portuguesa, os dois termos têm sido associados como sinônimos. A presente tese representa um esforço em compreender o desenvolvimento de dois conceitos – comemorações e efemérides – na longa duração. Os encontros e desvios entre as práticas associadas a um e a outro serão pontuados através da seleção de episódios intelectuais, seguidos pelo exame de debates que os tocavam na periferia de suas articulações. Na primeira parte, dedicada às comemorações, montei uma revisão desse bem conhecido tópico de estudos endereçada a uma única hipótese, a saber: o “ofício” comemorativo pode ser entendido como uma forma de comunicação e transmissão geracional de valores. Inspirado pelas fontes, argumento que os eventuais pontos de encontro entre o par de objetos propostos nesta tese são análogos às interrelações entre a “ordem do tempo” e a “ordem da natureza”, entre o tempo dos homens e o movimento das estrelas. Neste drama conceitual, se pudermos assim chamá-lo, faríamos perceber como a superação dos antigos modelos cosmológicos não se esquivou em guardar, para assumir termo caro a Pomian, uma lógica cronosófica. Se eu for bem sucedido, esse argumento deverá se expressar na segunda parte. As efemérides, como tábuas do movimento dos corpos celestes, vieram sofrer uma lenta transição rumo ao registro dos feitos humanos. Bebendo em fontes antigas e nas práticas de emulação, personagens bem conhecidos da primeira modernidade associaram o termo primeiro aos diários pessoais, depois ao jornalismo e, nos séculos seguintes, à história literária, religiosa e política. Na França, as éphémérides emergem da revolução já como um subgênero historiográfico. No Brasil da segunda metade do século XIX, listas de efemérides encontram lugar comum junto às comemorações dentro dos debates do IHGB. É no horizonte do projeto de nação que busco observar a união dos paralelos. Esse horizonte – como um ponto de chegada – vai aparecer ao final de cada secção da tese, observado a partir da celebração do quadricentenário da descoberta de Cabral.
“Comemorar efemérides” is a Portuguese phrase that despite its academic ring, is often used in the mainstream press. It translates roughly as 'the commemoration of an auspicious occasion’ and is used in reference to the public marking of nationally significant events. By the end of the nineteenth century, the two terms of this phrase came to be synonymous in Portuguese. This thesis represents an effort to understand the development of these two terms – efemérides and comemorações – over the longue durée. The long-term similarities in the practical and public uses of these terms are explored by tracing their discursive deployments and examining the debates that surrounded such public uses. The first section, dedicated to commemorations, frames the analysis of this much discussed topic with the following hypothesis: the act of commemoration is a form of moral utterance between generations; it is the rehearsal and transmission of collective values. Drawing on historical sources, I argue that the eventual points of contact between these terms can be seen as analogs to the discursive exchange and conflict between the classical and peripatetic notions of the “order of time” and the “order of nature”. In this conceptual drama, one sees how the sublation of old cosmological perspectives nevertheless still contains what I shall call – following Pomian – a chronosophy. This analysis leads to the second part of the thesis. Efemérides, originally tables of the movements of the celestial bodies – also known as almanacs – underwent a slow transition from the celestial to the earthly, from the charting of the stars to the recording of human deeds. Drawing on classical texts, well-informed readers of early modernity would have associated those writings in the first instance with diaries, then with journalism and, in the following centuries, with political history. Emerging from the French Revolution as a historiographical subgenre, lists of Efemérides shared a common function with commemorations as nation-building practices that described the horizon of a project to create national identity. This horizon, as a meeting point of moral utterance and political project is explored at the end of both sections of the thesis, as it is observed in the quadricentenial celebration of Cabral’s Discovery of Brazil. It is at this horizon that the parallel developments of comemorações and efemérides promise to meet.
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Kelly, John T. "Practical astronomy during the seventeenth century almanac-makers in America and England /." New York : Garland Pub, 1991. http://catalog.hathitrust.org/api/volumes/oclc/22909220.html.

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Books on the topic "Ephemerides"

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Michelsen, Neil F. The American ephemeris for the 20th century: 1900 to 2000 at midnight. 5th ed. San Diego, CA: ACS Publications, 2001.

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2

Pottenger, Rique. The new American ephemeris for the 20th century, 1900 to 2000 at noon. Epping, NH: Starcrafts Pub., 2009.

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3

Michelsen, Neil F. The American ephemeris for the 20th century: 1900 to 2000 at midnight. 5th ed. San Diego, CA: ACS Publications, 1991.

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4

Pottenger, Rique. The new American ephemeris for the 20th century, 1900 to 2000 at noon. Epping, NH: Starcrafts Pub., 2009.

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F, Michelsen Neil, ed. The new American ephemeris for the 20th century, 1900 to 2000, at noon. Epping, NH: Starcrafts Pub., 2009.

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Fellowship, Rosicrucian, ed. The Rosicrucian ephemeris: 2000-2100, 12h TDT (noon). Oceanside, CA: Rosicrucian Fellowship, 1992.

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Fellowship, Rosicrucian, ed. Simplified scientific ephemeris: 2000-2009 : computer calculated. Oceanside, Calif: Rosicrucian Fellowship, 1996.

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Pottenger, Rique. The new American ephemeris for the 20th century, 1900 to 2000 at noon. Epping, NH: Starcrafts Pub., 2009.

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Montenbruck, Oliver. Practical ephemeris calculations. Berlin: Springer-Verlag, 1989.

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Meeus, Jean. Astronomical tables of the sun, moon, and planets. Richmond, Virginia: Willmann-Bell, Inc., 2015.

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Book chapters on the topic "Ephemerides"

1

McNally, Derek. "Ephemerides (Ephemerides)." In Reports on Astronomy, 1–6. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3364-7_1.

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Morando, B., P. K. Seidelmann, V. K. Abalakin, S. Aoki, J. Chapront, R. L. Duncombe, T. Lederle, J. H. Lieske, B. D. Yallop, and A. Yamazaki. "Ephemerides." In Reports on Astronomy, 1–6. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2981-4_1.

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Bergeron, Jacqueline. "Ephemerides." In Reports on Astronomy, 1–6. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1100-3_1.

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West, Richard M. "Ephemerides." In Reports on Astronomy, 1–6. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5392-5_1.

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Zischka, K. A. "Ephemerides." In Astronavigation, 295–314. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-47994-1_8.

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Kinoshita, H., M. Standish, V. K. Abalakin, T. Fukoshima, G. A. Krasinsky, P. K. Seidelmann, J. E. Arlot, et al. "Commission 4: Ephemerides (Ephémérides)." In Reports on Astronomy, 67–70. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5762-9_11.

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Abalakin, Victor K. "Ephemerides and Celestial Mechanics." In Highlights of Astronomy, 65–68. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-010-9376-7_8.

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Neugebauer, O. "Ephemerides of the Moon." In Sources in the History of Mathematics and Physical Sciences, 41–278. New York, NY: Springer New York, 1995. http://dx.doi.org/10.1007/978-1-4612-5507-9_2.

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Neugebauer, O. "Ephemerides of the Planets." In Sources in the History of Mathematics and Physical Sciences, 279–444. New York, NY: Springer New York, 1995. http://dx.doi.org/10.1007/978-1-4612-5507-9_3.

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Bernardi, Gabriella. "Ephemerides Bononienses Mediceorum Syderum." In Giovanni Domenico Cassini, 59–64. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63468-5_12.

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Conference papers on the topic "Ephemerides"

1

Dolgakov, I. "Ephemerides of the Neptune’s satellites." In ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021. Crossref, 2022. http://dx.doi.org/10.51194/vak2021.2022.1.1.078.

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Abstract:
Planetary satellite’s ephemerides are valuable for spacecraft mission planing. Moreover, precise numerical theories of thenatural satellites motion make it possible to improve the precision of their central planet’s ephemeris using the positionalobservations of their satellites. This paper describes the numerical theories of the Neptune’s satellites — Triton, Nereidand Proteus constructed using the modern CCD ground-based observations as well as space-based observations from theVoyager 2 flyby mission.
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Standish, E. M., Alfredo Macias, Claus Lämmerzahl, and Abel Camacho. "Planetary and Lunar Ephemerides: testing alternate gravitational theories." In 2007. AIP, 2008. http://dx.doi.org/10.1063/1.2902789.

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Gratadour, Jean-Baptiste, and Ignacio Tanco. "Enforce Illumination Constraints with Fake Ephemerides on Venus Express." In SpaceOps 2008 Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-3354.

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Robustelli, Umberto, Guido Benassai, and Giovanni Pugliano. "Accuracy evaluation of Doresa and Milena Galileo satellites broadcast ephemerides." In 2018 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea). IEEE, 2018. http://dx.doi.org/10.1109/metrosea.2018.8657859.

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Araya, Isaias A., and Davide Amato. "Spectral analysis of US Space Catalog ephemerides for LAGEOS-1." In AIAA SCITECH 2022 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-1772.

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Hauschild, A., and O. Montenbruck. "Precise On-Board Navigation of LEO Satellites with GNSS Broadcast Ephemerides." In 33rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2020). Institute of Navigation, 2020. http://dx.doi.org/10.33012/2020.17752.

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Sheffler, Sara, Alan Segerman, and David Spencer. "A Comparison of Generated Ephemerides Using SpecialK with Various Atmospheric Models." In AIAA/AAS Astrodynamics Specialist Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-4542.

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King, Jennifer, Matthew Ruschmann, and George Davis. "Validation of an Autonomous Multi-Satellite Navigation Filter Against Precision Orbit Ephemerides." In 33rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2020). Institute of Navigation, 2020. http://dx.doi.org/10.33012/2020.17648.

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Kronland-Martinet, Thomas, Léo Poughon, Marcel Pasquinelli, David Duché, Julien R. Serres, and Stéphane Viollet. "SkyPole: a geolocation algorithm based on polarized vision without using astronomical ephemerides." In Polarization: Measurement, Analysis, and Remote Sensing XVI, edited by David B. Chenault, Meredith K. Kupinski, and Bradley M. Ratliff. SPIE, 2024. http://dx.doi.org/10.1117/12.3013560.

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Peng, Hsin-min, and Chia-shu Liao. "Performance Testing of Time Comparison using GPS Smoothed P3 Code and IGS Ephemerides." In 2004 Conference on Precision Electromagnetic Measurements. IEEE, 2004. http://dx.doi.org/10.1109/cpem.2004.305545.

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Reports on the topic "Ephemerides"

1

Forbes, Jeffrey M. Data Assimilation for Thermospheric Density Forecasting with Application to Satellite Ephemeris Prediction. Fort Belvoir, VA: Defense Technical Information Center, September 2001. http://dx.doi.org/10.21236/ada388709.

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