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Single Station Doppler Tracking For Satellite Orbit Prediction And Propagation
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Book Synopsis Single Station Doppler Tracking for Satellite Orbit Prediction and Propagation by : Matthew C. Dykstra
Download or read book Single Station Doppler Tracking for Satellite Orbit Prediction and Propagation written by Matthew C. Dykstra and published by . This book was released on 2015 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presently, there are two main methods of launching a cube satellite into Earth orbit. The first method is to purchase a secondary payload slot on a major launch vehicle. For the second method, the satellite must first be transported via a major launch vehicle to the International Space Station. From there, the satellite is loaded into one of two deployment mechanisms, and deployed at a specified time. In each case, the satellite's initial orbit is not accurately known. For ground operators this poses a problem of position uncertainty. In order to solve this problem, a satellite tracking algorithm was developed to use an initial two-line element set for coarse orbit prediction, followed by Doppler measurements for continuous processing and updating. The system was tested using simulated data. The analysis showed that this low-cost, scalable system will satisfy the tracking requirements of many cube satellite missions, including current missions at the University of Texas.
Book Synopsis A Computing Program for the Doppler Tracking of Silent Satellites by : William H. Guier
Download or read book A Computing Program for the Doppler Tracking of Silent Satellites written by William H. Guier and published by . This book was released on 1958 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the computing program is to use a single Doppler curve to estimate a rough orbit of a silent satellite for purposes of identification and prediction. This report contains the assumptions, theoretical equations, code, and preliminary tracking results of this initial computing program. To test the program, two sets of Doppler data, taken during two different passes of Explorer IV, were used to predict the Explorer IV orbit, and the resulting predicted orbits were compared with other orbit determinations. It was found that about forty minutes of computing time on the Univac 1103A were required to determine a predicted orbit from one set of Doppler data. The error in the predicted satellite position was found to range from less than twenty miles for an overhead pass to about 100 miles for a more distant pass. It is shown that this error is due mainly to the neglect of ionospheric refraction and second order force terms in the theoretical expression for the Doppler shift, factors which were neglected because of the requirement of keeping computing time to a minimum. Suggestions are made for future re-coding of the program which should materially reduce the tracking error without increasing the computing time. (Author).
Book Synopsis Statistical Orbit Determination by : Bob Schutz
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.
Book Synopsis Radiometric Tracking Techniques for Deep-Space Navigation by : Catherine L. Thornton
Download or read book Radiometric Tracking Techniques for Deep-Space Navigation written by Catherine L. Thornton and published by John Wiley & Sons. This book was released on 2005-03-04 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiometric Tracking Techniques for Deep-Space Navigation focuses on a broad array of technologies and concepts developed over the last four decades to support radio navigation on interplanetary spacecraft. In addition to an overview of Earth-based radio navigation techniques, the book includes a simplified conceptual presentation of each radiometric measurement type, its information content, and the expected measeurement accuracy. The methods described for both aquiring and calibrating radiometric measurements also provide a robust system to support guidance and navigation for future robotic space exploration.
Book Synopsis SATELLITE TRACKING BY RADIO. by : ROY E. ANDERSON
Download or read book SATELLITE TRACKING BY RADIO. written by ROY E. ANDERSON and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies have shown that satellite doppler data from telemetry and single beacon transmitters below 500 Mc will generally not provide accurate data for single station orbit determination due to frequency measurement inaccuracy, frequency instability, and refraction in the ionosphere. Accurate doppler tracking can be achieved if the satellite transmits on frequencies in the upper part of the UHF range or higher, if a very stable oscillator is used in the satellite, and very sophisticated frequency counting and computing techniques are used at the ground stations. If satellite transmitting frequencies below approximately 500 Mc are used, it may be helpful to correct for ionospheric refraction by actual measurement, using 2 widely separated satellite transmitting frequencies. Mathematical techniques for orbit determination using radio frequency data were investigated for closed form methods and an iterative method. Also, experiments were conducted to determine feasibility of obtaining simultaneous azimuth and doppler data using a special type of radio direction finder. (Author).
Book Synopsis Doppler Applications in LEO Satellite Communication Systems by : Irfan Ali
Download or read book Doppler Applications in LEO Satellite Communication Systems written by Irfan Ali and published by Springer Science & Business Media. This book was released on 2005-12-06 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doppler Applications in LEO Satellite Communication Systems develops and presents an important class of techniques useful in the construction of little Low Earth Orbit (LEO) satellite communication systems. It centers on the very significant Doppler shift that attends communications through a LEO satellite and shows how this phenomenon can be exploited for an unexpected benefit. The techniques taught in the book are expected to be particularly attractive to system engineers because ground-based transceivers must generally compensate for the large Doppler component and therefore the necessary receiver processing loops are often already in place and expensed. This volume starts with a recounting of the characteristics of a LEO satellite and its orbit. The 2nd chapter addresses the LEO orbital geometry and reviews the Doppler effect attending LEO communications. Chapter three is focused on the important task of estimating the Doppler at a ground terminal. Appropriate signal processing algorithms are reviewed. Chapter four is concerned with predicting LEO satellite visibility. Chapters five and six are, respectively, devoted to the use of the significant LEO Doppler as an aid in a new traffic flow control protocol and as an aid for effecting communications power control. The last chapter describes MATLAB® based analysis. Doppler Applications in LEO Satellite Communication Systems provides a thorough review of the LEO Doppler phenomenon.
Book Synopsis Satellite Orbits by : Oliver Montenbruck
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.
Book Synopsis Studies on Doppler Residuals-i: Dependence on Satellite Orbit Error and Station Position Error by : W. H. GUIER
Download or read book Studies on Doppler Residuals-i: Dependence on Satellite Orbit Error and Station Position Error written by W. H. GUIER and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The manner in which station position error and satellite orbit error affect the time dependence of the doppler residuals is considered for one pass of the satellite above a station's horizon. Consequently, the correlation of satellite position and velocity error during the time of the satellite pass is discussed in particular detail. The error is considered in the 'navigated' position of a tracking station by a least squares fit to the doppler residuals - being motivated by the manner in which spurious data is deleted in the preprocessing of doppler data through movement of the station's position.
Book Synopsis Proceedings of the Second International Geodetic Symposium on Satellite Doppler Positioning by :
Download or read book Proceedings of the Second International Geodetic Symposium on Satellite Doppler Positioning written by and published by . This book was released on 1979 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relativistic Effects in Satellite Dynamics and Doppler Tracking by : M. D. Harkins
Download or read book Relativistic Effects in Satellite Dynamics and Doppler Tracking written by M. D. Harkins and published by . This book was released on 1973 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principle relativistic effects of interest for the problems of satellite tracking and orbit prediction are considered. Due to relativistic modifications of Newtonian dynamics, the perifocus of a satellite orbiting in a central field will advance at a fixed rate. This effect is cumulative and for a typical earth satellite amounts to an advance of perigee of about one meter a day. An expression is given for obtaining a classical perturbation term which reproduces this relativistic effect to second order. The classical Doppler shift is also modified since the rate at which clocks run will depend, according to relativity, on their state of motion and the strength of the gravitational field at their location. For Doppler tracked earth satellites, the effective correction varies sinusoidally with the true anomaly. For some typical earth satellites the amplitude ranges from a few parts in 10 to the -12th power up to a few parts in 10 to the -10th power. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computation of Positions of Doppler Satellite Observing Stations by : Larry K. Beuglass
Download or read book Computation of Positions of Doppler Satellite Observing Stations written by Larry K. Beuglass and published by . This book was released on 1975 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer program is described which forms and solves normal equations for station position and bias parameters. The satellite observations are obtained from the geoceiver, a lightweight Doppler tracking equipment. The orbit of the satellite is held fixed in the computations. A single pass solution for longitude and latitude as well as a three-dimensional solution for longitude, latitude, and height is computed. The program also includes segments for filtering the data, correcting for ionospheric and tropospheric refraction, and navigating the station in the plane of the satellite velocity vector and station position.
Book Synopsis Rapid Determination of Satellite Orbits from Doppler Data by : Robert R. Newton
Download or read book Rapid Determination of Satellite Orbits from Doppler Data written by Robert R. Newton and published by . This book was released on 1963 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the orbit determination procedure described in this paper, the set of physical quantities fitted in the computations is not the set of basic measurements made by the ground stations. Rather, it uses the basic measurements on a pass-by-pass basis, together with a preliminary estimate of the orbit, to determine a fictitious position of the tracking station for each pass. It can be shown that the error in station position is also a representation of the error in satellite position at the center time of the pass. Thus, for each pass, a new estimate of satellite position is formed, and a new orbit is chosen to fit these positions. It should be possible to apply this method to any type of tracking data. With Doppler data, the convergence of the orbit determination position is much faster than that of the conventional method. (Author).
Book Synopsis Continuing Kepler's Quest by : National Research Council
Download or read book Continuing Kepler's Quest written by National Research Council and published by National Academies Press. This book was released on 2012-09-06 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: In February 2009, the commercial communications satellite Iridium 33 collided with the Russian military communications satellite Cosmos 2251. The collision, which was not the first recorded between two satellites in orbit-but the most recent and alarming-produced thousands of pieces of debris, only a small percentage of which could be tracked by sensors located around the world. In early 2007, China tested a kinetic anti-satellite weapon against one of its own satellites, which also generated substantial amounts of space debris. These collisions highlighted the importance of maintaining accurate knowledge, and the associated uncertainty, of the orbit of each object in space. These data are needed to predict close approaches of space objects and to compute the probability of collision so that owners/operators can decide whether or not to make a collision avoidance maneuver by a spacecraft with such capability. The space object catalog currently contains more than 20,000 objects, and when the planned space fence radar becomes operational this number is expected to exceed 100,000. A key task is to determine if objects might come closer to each other, an event known as "conjunction," and the probability that they might collide. The U.S. Air Force is the primary U.S. government organization tasked with maintaining the space object catalog and data on all space objects. This is a complicated task, involving collecting data from a multitude of different sensors-many of which were not specifically designed to track orbiting objects-and fusing the tracking data along with other data, such as data from atmospheric models, to provide predictions of where objects will be in the future. The Committee for the Assessment of the U.S. Air Force's Astrodynamic Standards collected data and heard from numerous people involved in developing and maintaining the current astrodynamics standards for the Air Force Space Command (AFSPC), as well as representatives of the user community, such as NASA and commercial satellite owners and operators. Preventing collisions of space objects, regardless of their ownership, is in the national security interested of the United States. Continuing Kepler's Quest makes recommendations to the AFSPC in order for it to create and expand research programs, design and develop hardware and software, as well as determine which organizations to work with to achieve its goals.
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
Book Synopsis Tracking Error Propagation and Orbit Prediction Program by : R. L. Mobley
Download or read book Tracking Error Propagation and Orbit Prediction Program written by R. L. Mobley and published by . This book was released on 1970 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report is a description of TEPOP (Tracking Error Propagation and Orbit Prediction Program), a rand-modified FORTRAN IV program used in the AFSC/ADC Joint Mission Analysis on Surveillance of Objects in Space. TEPOP simulates space-vehicle tracking data from as many as 54 sensors. Rand improvements: Sensors may be satellite-based, may rotate, may be limited in azimuth, elevation, and range; drag bias can be included; the JPL ephemeris tape is used; the program was converted to double-precision. Besides determining a target's path from real data, TEPOP can be used to generate synthetic data for objects orbiting earth, sun, moon, Mars, Venus, or Jupiter, or on an interplanetary course; to study the effects of introducing random and systematic errors; and to generate confidence regions for position and velocity. (Author).
Book Synopsis Study of a Homotopy Continuation Method for Early Orbit Determination with the Tracking and Data Relay Satellite System, (TDRSS) by : R. L. Smith
Download or read book Study of a Homotopy Continuation Method for Early Orbit Determination with the Tracking and Data Relay Satellite System, (TDRSS) written by R. L. Smith and published by . This book was released on 1986 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
