Download or read book Accurate Orbit Determination and Observations of High Earth Satellites for Geodynamics written by Antonio Elipe and published by Musee National D'Histoire Naturelle. This book was released on 1995 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Workshop written by Paul Pâquet and published by . This book was released on 1995 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Satellite Orbits written by Oliver Montenbruck and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This modern presentation guides readers through the theory and practice of satellite orbit prediction and determination. Starting from the basic principles of orbital mechanics, it covers elaborate force models as well as precise methods of satellite tracking. The accompanying CD-ROM includes source code in C++ and relevant data files for applications. The result is a powerful and unique spaceflight dynamics library, which allows users to easily create software extensions. An extensive collection of frequently updated Internet resources is provided through WWW hyperlinks.
Download or read book Determination of Precise Satellite Orbits and Geodetic Parameters using Satellite Laser Ranging written by Krzysztof Sośnica and published by Astronomical Institute, University of Bern, Switzerland. This book was released on 2014-04-07 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contribution of Satellite Laser Ranging (SLR) to the definition of the origin of the reference frame (geocenter coordinates), the global scale, and low degree coefficients of the Earth's gravity field is essential due to the remarkable orbit stability of geodetic satellites and the accuracy of laser observations at a level of a few millimeters. Considering these aspects, SLR has an exceptional potential in establishing global networks and deriving geodetic parameters of the supreme quality. SLR faces today the highest requirements of the Global Geodetic Observing System (GGOS) yielding 1 mm of long-term station coordinate and 0.1 mm/y of station velocity stability. The goal of this work is to assess the contribution of the latest models and corrections to the SLR-derived parameters, to enhance the quality and reliability of the SLR-derived products, and to propose a new approach of orbit parameterization for low orbiting geodetic satellites. The impact of orbit perturbations is studied in detail, including perturbing forces of gravitational origin (Earth's gravity field, ocean and atmosphere tides) and perturbing forces of non-gravitational origin (atmospheric drag, the Yarkovsky effect, albedo and Earth's infrared radiation pressure). A multi-satellite combined solution is obtained using SLR observations to LAGEOS-1, LAGEOS-2, Starlette, Stella, and AJISAI. The quality of the SLR-derived parameters from the combined solution is compared with external solutions. The Earth rotation parameters are compared to the IERS-08-C04 series and the GNSS-derived series, whereas the time variable Earth's gravity field coefficients are compared to the CHAMP and GRACE-derived results.
Download or read book Statistical Orbit Determination written by Bob Schutz and published by Elsevier. This book was released on 2004-06-26 with total page 563 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statistical Orbit Determination presents fundmentals of orbit determination--from weighted least squares approaches (Gauss) to today's high-speed computer algorithms that provide accuracy within a few centimeters. Numerous examples and problems are provided to enhance readers' understanding of the material. Covers such topics as coordinate and time systems, square root filters, process noise techniques, and the use of fictitious parameters for absorbing un-modeled and incorrectly modeled forces acting on a satellite. Examples and exercises serve to illustrate the principles throughout each chapter.
Download or read book Geosynchronous Orbit Determination Using High Accuracy Angular Observations written by and published by . This book was released on 2005 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the High Accuracy Network Determination System (HANDS), Raven-class telescopes were built to provide observations with less than an arcsecond of error. While achieving low noise levels, previous work has shown that HANDS optical data contain systematic errors which limit orbit determination accuracy; therefore, the challenge is being able to fully utilize that data to produce deep-space orbits with great certainty. This paper presents findings that better define the limitations of the angles-only observation sets. The results presented supplement, refine, and provide more detailed analysis of the previous work in the areas of systematic error modeling, error assessment, and unmodeled perturbations. This research was accomplished by analyzing orbit determination solutions for a geosynchronous satellite (TDRS-5) and a decommissioned supersynchronous defense satellite (DSCS-3/A1).
Download or read book Geometrical Theory of Satellite Orbits and Gravity Field written by Drazen Svehla and published by Springer. This book was released on 2018-07-02 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book on space geodesy presents pioneering geometrical approaches in the modelling of satellite orbits and gravity field of the Earth, based on the gravity field missions CHAMP, GRACE and GOCE in the LEO orbit. Geometrical approach is also extended to precise positioning in space using multi-GNSS constellations and space geodesy techniques in the realization of the terrestrial and celestial reference frame of the Earth. This book addresses major new developments that were taking place in space geodesy in the last decade, namely the availability of GPS receivers onboard LEO satellites, the multitude of the new GNSS satellite navigation systems, the huge improvement in the accuracy of satellite clocks and the revolution in the determination of the Earth's gravity field with dedicated satellite missions.
Download or read book An Improved Strategy for Determining Earth Satellite Orbits by Radio written by Charles C Counselman (III.) and published by . This book was released on 1988 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: For satellite orbit determination, the most accurate observable available today is microwave phase, differenced between observing stations and between satellites to cancel both transmitter and receiver related errors. For maximum accuracy, the integer cycle ambiguities of such observations must be resolved. To perform this ambiguity resolution, a bootstrapping strategy is effective. The tracking stations must have a wide ranging progression of spacings. Then, by conventional 'integrated Doppler' processing of the observations from the most widely spaced stations, the orbits can be determined well enough to permit resolution of the ambiguities of the observations from the most closely spaced stations. The resolution of these ambiguities can reduce the uncertainty of the orbit determination enough to enable ambiguity resolution for more widely spaced stations, which will reduce the orbital uncertainty further, and enable ambiguity resolution resolution for still more widely spaced stations, and so on. In a test of this strategy with a total of six tracking stations, both the formal and the actual errors of determining NAVSTAR Global Positioning System satellite orbits were reduced by a factor of two. (rh).
Download or read book Algorithms for Satellite Orbital Dynamics written by Lin Liu and published by Springer Nature. This book was released on 2023-06-20 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the fundamental physics of orbit theory, dynamical models, methods of orbit determination, design, measurement, adjustment, and complete calculations for the position, tracking, and prediction of satellites and deep spacecraft. It emphasizes specific methods, related mathematical calculations, and worked examples and exercises. Therefore, technicians and engineers in the aerospace industry can directly apply them to their practical work. Dedicated to undergraduate students and graduate students, researchers, and professionals in astronomy, physics, space science, and related aerospace industries, the book is an integrated work based on the accumulated knowledge in satellite orbit dynamics and the author’s more than five decades of personal research and teaching experience in astronomy and aerospace dynamics.
Download or read book Efficient Methods for Determining Precise Orbits of Low Earth Orbiters Using the Global Positioning System written by Heike Bock and published by . This book was released on 2003 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orbit Determination and Analysis written by COSPAR. Scientific Assembly and published by Elsevier Science & Technology. This book was released on 1997 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paperback. This publication contains the proceedings of the meetings of the COSPAR Technical Panel on Satellite Dynamics which took place during the 31st Cospar Scientific Assembly held in Birmingham (UK) in July 1996. The 20 papers cover a variety of topics relating mainly to satellite orbit determination and analysis. A group of papers discusses orbit determination of low earth orbiters, in particular earth observation and research missions having high accuracy and using various various types of tracking support (data relay satellites, PRARE, laser, GPS). Two papers on geostationary orbits describe a project for their use in time-transfer and their evolution with time. Modelling problems associated with surface forces are analysed by a number of authors (an overview paper on Lageos perturbation models; the impact of surface forces on gravity models covering penumbra affects, numerical integration and attitude motion). One paper describes a visualisation
Download or read book The Century of Space Science written by J.A. Bleeker and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1819 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most attractive features of the young discipline of Space Science is that many of the original pioneers and key players involved are still available to describe their field. Hence, at this point in history we are in a unique position to gain first-hand insight into the field and its development. To this end, The Century of Space Science, a scholarly, authoritative, reference book presents a chapter-by-chapter retrospective of space science as studied in the 20th century. The level is academic and focuses on key discoveries, how these were arrived at, their scientific consequences and how these discoveries advanced the thoughts of the key players involved. With over 90 world-class contributors, such as James Van Allen, Cornelis de Jager, Eugene Parker, Reimar Lüst, and Ernst Stuhlinger, and with a Foreword by Lodewijk Woltjer (past ESO Director General), this book will be immensely useful to readers in the fields of space science, astronomy, and the history of science. Both academic institutions and researchers will find that this major reference work makes an invaluable addition to their collection.
Download or read book Near Real time Precise Orbit Determination of Low Earth Orbit Satellites Using an Optimal GPS Triple differencing Technique written by Tae-Suk Bae and published by . This book was released on 2006 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: During the last decade, numerous Low Earth Orbit (LEO) satellites, including TOPEX/POSEIDON, CHAMP and GRACE, have been launched for scientific purposes at altitudes ranging from 400 km to 1300 km. To support GPS meteorology, efficient LEO orbit determination methods were developed using the triple-differenced GPS phase observations. These methods include the kinematic, dynamic, and reduced-dynamic approach based on the wave algorithm. To test the developed algorithms, 24 hours of CHAMP data on February 15, 2003, which amounts to 15 revolutions, were used for each method. Precise IGS orbits are used for the GPS satellites, and 43 IGS ground tracking stations were chosen using the algorithm developed in this study, based on the network optimization theory. The estimated orbit solutions were compared with the published Rapid Science Orbit (RSO) and the consistency testing was performed for the dynamic solution. In addition, the SLR residuals were also computed as an independent validation of the methods presented here. After the forward and backward filtering, the kinematic approach shows accuracy better than "20 cm in 3D RMS for a half day arc compared to the reference RSO. With this careful modeling, the dynamic solution shows an agreement within "8 cm in position and "0.12 mm/s in velocity of RSO. The computation time of the dynamic solution for the 24-hour arc is 2.5 hours on a 3 GHz PC platform. The wave algorithm shows a better fit to RSO for each tested segment. However, there is slightly larger bias in its solution, thus, the overall RMS of fit is comparable to the dynamic orbit solution. The CHAMP orbit is successfully estimated in this study to support, for example, the GPS meteorology, using a new method that is accurate as well as fast and efficient. The hypothesis testing indicates that the estimated dynamic solution of this study is consistent with the published RSO. Also, the SLR residual test shows that the CHAMP orbit solution estimated in this study is comparable to solutions determined by other analysis centers, such as JPL and GFZ.
Download or read book Geodynamics Branch Annual Report 1985 written by Werner D. Kahn and published by . This book was released on 1987 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orbit Determination in the Presence of Gravity Model Errors written by B. E. Schutz and published by . This book was released on 1972 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The precise determination of a satellite's position is of prime importance in satellite geodesy and in the use of satellites in studying geodynamics. It is not possible, however, to obtain a precise estimate of the satellite's position if sufficiently large errors exist in the gravity model. In this investigation, the application of a dynamic model compensation method to the problem of estimating the motion of a near-earth satellite in the presence of gravity model errors is described. Based on numerical results obtained in a computer simulation, it is concluded that the algorithm will yield an accurate estimate of the state in the presence of gravity model errors. The effects of the observation type and accuracy, station location and observation batch size on the accuracy of the orbit determination procedure are considered. Finally, it is shown that in addition to an accurate estimate of the position and velocity, the method can be used to obtain an accurate estimate of the unmodeled acceleration components. (Author).
Download or read book Precise Geodetic Infrastructure written by National Research Council and published by National Academies Press. This book was released on 2010-10-25 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geodesy is the science of accurately measuring and understanding three fundamental properties of Earth: its geometric shape, its orientation in space, and its gravity field, as well as the changes of these properties with time. Over the past half century, the United States, in cooperation with international partners, has led the development of geodetic techniques and instrumentation. Geodetic observing systems provide a significant benefit to society in a wide array of military, research, civil, and commercial areas, including sea level change monitoring, autonomous navigation, tighter low flying routes for strategic aircraft, precision agriculture, civil surveying, earthquake monitoring, forest structural mapping and biomass estimation, and improved floodplain mapping. Recognizing the growing reliance of a wide range of scientific and societal endeavors on infrastructure for precise geodesy, and recognizing geodetic infrastructure as a shared national resource, this book provides an independent assessment of the benefits provided by geodetic observations and networks, as well as a plan for the future development and support of the infrastructure needed to meet the demand for increasingly greater precision. Precise Geodetic Infrastructure makes a series of focused recommendations for upgrading and improving specific elements of the infrastructure, for enhancing the role of the United States in international geodetic services, for evaluating the requirements for a geodetic workforce for the coming decades, and for providing national coordination and advocacy for the various agencies and organizations that contribute to the geodetic infrastructure.
Download or read book Precision Orbit Determination from GPS Receiver Navigation Solutions written by Scott Shannon Carter and published by . This book was released on 1996-06-01 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellite tracking techniques have traditionally been limited to ground-based stations that measure a satellite's range, azimuth, elevation and range rate, The advent of high accuracy Global Positioning System (GPS) navigation techniques, however, offers alternative methods. This thesis investigates the use of GPS navigation solutions (earth-centered, earth-fixed position and velocity information) as an observation source in a weighted least- squares orbit determination process. Such an orbit determination scheme could limit dependence upon the costly and complex ground-based tracking facilities for low and medium earth orbit satellites, while providing real-time information for on-board instrumentation and mission management. This investigation included modification of the Draper Laboratory version of the Goddard Trajectory Determination System (Draper R&D GTDS) to include coordinate systems compatible with the Fifth Fundamental Catalogue (FK5) and an inertial true equator and equinox of date frame. Solid earth tide modeling was introduced for numerical integration techniques and refined for semianalytic methods. The accuracy of the navigation solution-derived orbits (and the ability of Draper R&D GTDS to model spacecraft motion) is determined for the Ocean Topography Experiment (TOPEX), Technology for Autonomous Operational Survivability (TAOS), and Extreme Ultraviolet Explorer (EUVE) through comparison to high quality, independently generated 'truth' solutions (Precise Orbit Ephemerides, or POEs).
