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 A Role for Improved Angular Observations in Geosynchronous Orbit Determination written by Christopher Andrew Sabol and published by . This book was released on 1998-09-01 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this thesis showed improved angular observations aided the determination of satellite position and velocity in the geosynchronous orbit regime. Raven was a sensor developed by U. S. Air Force Research Laboratory which allowed for angular observations of satellites to be made with a standard deviation of 1 arc second (which maps into approximately 170 meters at geosynchronous altitude); this was an order of magnitude improvement over traditional angular observation techniques and represented state of the art accuracy of angular observations for geosynchronous orbit determination work. Studies showed these angular observations could be used in the orbit determination process both as the only tracking data source and as a supplement to other tracking data sources such as radar and radio transponder ranges. Results from the radio transponder range analysis were extended to cover Satellite Laser Ranging (SLR) and Global Positioning System (GPS) observation types as well. The studies targeted both space surveillance and owner/operator mission support aspects of orbit determination although the emphasis was on mission support satellite operations. Parameters varied in the simulation studies included the number of observing stations, density of the angular observations, and number of nights of optical tracking.
Download or read book Modern Astrodynamics written by and published by Elsevier. This book was released on 2006-10-19 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, an unprecedented interest in novel and revolutionary space missions has risen out of the advanced NASA and ESA programs. Astrophysicists, astronomers, space systems engineers, mathematicians and scientists have been cooperating to implement novel and ground-breaking space missions. Recent progress in mathematical dynamics has enabled development of specialised spacecraft orbits and propulsion systems. Recently, the concept of flying spacecraft in formation has gained a lot of interest within the community. These progresses constitute the background to a significant renaissance of research dealing with astrodynamics and its applications. Modern Astrodynamics is designed as a stepping stone for the exposition of modern astrodynamics to students, researchers, engineers and scientists. This volume will present the main constituents of the astrodynamical science in an elaborate, comprehensive and rigorous manner. Although the volume will contain a few distinct chapters, it will render a coherent portrayal of astrodynamics. Encompasses the main constituents of the astrodynamical sciences in an elaborate, comprehensive and rigorous manner Presents recent astrodynamical advances and describes the challenges ahead The first volume of a series designed to give scientists and engineers worldwide an opportunity to publish their works in this multi-disciplinary field
Download or read book A Comprehensive Comparison Between Angles only Initial Orbit Determination Techniques written by Andrew Vernon Schaeperkoetter and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two centuries many methods have been proposed to solve the angles-only initial orbit determination problem. As this problem continues to be relevant as an initial estimate is needed before high accuracy orbit determination is accomplished, it is important to perform direct comparisons among the popular methods with the aim of determining which methods are the most suitable (accuracy, robustness) for the most important orbit determination scenarios. The methods tested in this analysis were the Laplace method, the Gauss method (suing the Gibbs and Herrick-Gibbs methods to supplement), the Double R method, and the Gooding method. These were tested on a variety of scenarios and popular orbits. A number of methods for quantifying the error have been proposed previously. Unfortunately, many of these methods can overwhelm the analyst with data. A new method is used here that has been shown in previous research by the author. The orbit error is here quantified by two new general orbit error parameters identifying the capability to capture the orbit shape and the orbit orientation. The study concludes that for nearly all but a few cases, the Gooding method best estimates the orbit, except in the case for the polar orbit for which it depends on the observation interval whether one uses the Gooding method or the Double R method. All the methods were found to be robust with respect to noise and the initial guess (if required by the method). All the methods other than the Laplace method suffered no adverse effects when additional observation sites were used and when the observation intervals were unequal. Lastly for the case when the observer is in space, it was found that typically the Gooding method performed the best if a good estimate is known for the range, otherwise the Laplace method is generally best.
Download or read book A Method for Accurate Orbit Determination from Three Angles only Observations written by Walker Mangum and published by . This book was released on 1970 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geosynchronous Orbit Determination Using Space Surveillance Network Observations and Improved Radiative Force Modeling written by Richard Harry Lyon and published by . This book was released on 2004 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) NOAA ranging observations are included in some of the tests for the GOES-10 spacecraft. The space-based visible (SBV) observation model has also been incorporated into GTDS, and SBV observations are included in the orbit determination testing. The tests combine the various types of observation data, and implement various observations corrections and biases. The results of this thesis give a better understanding of the process of determining precise orbits for GEO spacecraft with the box-wing model and SSN observations.
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 Methods for Initial Relative Orbit Determination Using Angles only Observations written by Ethan M. Pratt and published by . This book was released on 2014 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spaceflight Mechanics written by and published by . This book was released on 2005 with total page 1150 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 Geosynchronous SAR System and Signal Processing written by Teng Long and published by Springer. This book was released on 2018-04-20 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book chiefly addresses the analysis and design of geosynchronous synthetic aperture radar (GEO SAR) systems, focusing on the algorithms, analysis, methods used to compensate for ionospheric influences, and validation experiments for Global Navigation Satellite Systems (GNSS). Further, it investigates special problems in the GEO SAR context, such as curved trajectories, the Earth’s rotation, the ‘non-stop-and-go’ model, high-order Doppler parameters, temporal-variant ionospheric errors etc. These studies can also be extended to SAR with very high resolution and long integration time. Given the breadth and depth of its coverage, scientists and engineers in SAR and advanced graduate students in related areas will greatly benefit from this book.
Download or read book Application of Initial Orbit Determination Methods to Telescope Observations written by Carson Hunsberger and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space Domain Awareness is aimed at providing timely and accurate information of the space environment. This was originally done by maintaining a catalog of space objects states (position and velocity). With the ever-increasing population of man-made space debris, in-orbit explosions, collisions and potential impacts of near Earth objects, it has become imperative to modify the traditional approach to a more predictive, tactical and exact rendition. Hence, a precise orbit propagation model coupled with state-of-the-art orbit determination techniques need to be developed which warrants a better understanding of the perturbations in the near Earth space. Additionally, the sensors used to track these objects in space have to be tasked appropriately to observe and catalog these Resident Space Objects (RSO). This work outlines the intricacies of using inertial measurements from an observation site on the surface of the Earth. Optical measurements from the Falcon Telescope Network nodes at Penn State, and Colorado, managed by USAFA, is utilized to schedule observations of objects in the geosynchronous belt. An orbit determination algorithm is implemented to obtain the osculating orbital elements of the observed RSO. Further, a rudimentary sensor tasking strategy is developed by modeling the dynamics equations in a topocentric frame thereby allowing for fast generation of a "tasking surface". Its utility is demonstrated through simulations showing detections of over 200 RSOs from the geosynchronous satellite catalog.
Download or read book Astrodynamics written by and published by . This book was released on 2000 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Accuracy of an Elliptical Orbit Determination written by Robert F. Weirauch and published by . This book was released on 1961 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orbit Determination from Visual Sightings An Investigation of Two Angles Only Orbit Determination Processes Including a Science Activity for Middle and High School Students written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project will investigate the possibilities of determining the orbit of a satellite from the data obtained by observing the satellite passing across the sky. With simple tools such as a stopwatch, compass, and star map or camera, I believe that the orbit of a satellite may be determined by an angles only approach. In addition, young students, of middle school age and older, could be exposed to the fundamentals of orbital mechanics by conducting such an activity. The calculations required to complete this activity will be manipulated into a coded algorithm. This enables the user to enter information which they retrieved during the satellite pass and get back the calculated orbit of the satellite which they observed. This data could then be used to predict future passes of that satellite. This paper will contain a science activity to aid in teaching the fundamentals of orbital mechanics to middle school students. In addition, it will contain a detailed list of instructions for determining when a satellite will be visible to a user's location, as well as how to obtain pertinent data while observing a satellite pass.
Download or read book Journal of the Indian Institute of Science written by Indian Institute of Science, Bangalore and published by . This book was released on 2006 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 8th China High Resolution Earth Observation Conference CHREOC 2022 written by Liheng Wang and published by Springer Nature. This book was released on 2022-11-29 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings has four thematic parts: advanced aerospace manufacturing technology, near space system and application technology, accurate perception technology of the earth, and collaborative fusion application technology. The CHREOCs (China High-resolution Earth Observation Conference) focus on the popular topics including military-civilian integration, the One Belt and One Road project, the transformation of scientific research achievements, and it also discusses the new ideas, new technologies, new methods, and new developments. The CHREOCs have effectively promoted high-level institutional mechanisms, technological innovation, and industrial upgrading in the high-resolution earth observation area, and arouse the influence of the national-sponsored major project. All papers in this proceeding are from the 8th CHREOC, and most authors are the researchers and experts participating the state major project CHEOS. The papers are the extraction of research results and reflect the technique level and research direction of the field high-resolution earth observation. All articles have gone through the scientific and strict reviews for several rounds by the experts from the related fields, and therefore reflect the research level and technology innovation of the high-resolution field earth observation. It will be an informative and valuable reference for both academic research and engineering practice. The year 2022 is the final year of high-resolution special projects. After more than ten years of construction, the task of high-resolution special projects has been basically completed, the core technology has been comprehensively breakthrough, and the typical achievements have been rapidly transformed, providing strong support for national security, national defense construction and national economic development.
