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Dynamic Sea Surface Topography Gravity And Improved Orbit Accuracies From The Direct Evaluation Of Seasat Altimeter Data
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723036453 Total Pages :110 pages Book Rating :4.0/5 (364 download)
Book Synopsis Dynamic Sea Surface Topography, Gravity and Improved Orbit Accuracies from the Direct Evaluation of Seasat Altimeter Data by : National Aeronautics and Space Administration (NASA)
Download or read book Dynamic Sea Surface Topography, Gravity and Improved Orbit Accuracies from the Direct Evaluation of Seasat Altimeter Data written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for the simultaneous solution of dynamic ocean topography, gravity and orbits using satellite altimeter data is described. A GEM-T1 based gravitational model called PGS-3337 that incorporates Seasat altimetry, surface gravimetry and satellite tracking data has been determined complete to degree and order 50. The altimeter data is utilized as a dynamic observation of the satellite's height above the sea surface with a degree 10 model of dynamic topography being recovered simultaneously with the orbit parameters, gravity and tidal terms in this model. PGS-3337 has a geoid uncertainty of 60 cm root-mean-square (RMS) globally, with the uncertainty over the altimeter tracked ocean being in the 25 cm range. Doppler determined orbits for Seasat, show large improvements, with the sub-30 cm radial accuracies being achieved. When altimeter data is used in orbit determination, radial orbital accuracies of 20 cm are achieved. The RMS of fit to the altimeter data directly gives 30 cm fits for Seasat when using PGS-3337 and its geoid and dynamic topography model. This performance level is two to three times better than that achieved with earlier Goddard earth models (GEM) using the dynamic topography from long-term oceanographic averages. The recovered dynamic topography reveals the global long wavelength circulation of the oceans with a resolution of 1500 km. The power in the dynamic topography recovery is now found to be closer to that of oceanographic studies than for previous satellite solutions. This is attributed primarily to the improved modeling of the geoid which has occurred. Study of the altimeter residuals reveals regions where tidal models are poor and sea state effects are major limitations. Marsh, J. G. and Lerch, F. and Koblinsky, C. J. and Klosko, S. M. and Robbins, J. W. and Williamson, R. G. and Patel, G. B. Goddard Space Flight Center GRAVITATIONAL FIELDS; OCEAN CURRENTS; OCEAN DYNAMICS; OCEAN SURFACE; ORBITAL POSITION ESTIMATION; SATELLITE ALTIMETRY;...
Book Synopsis Sea Surface Topography and the Geoid by : Hans Sünkel
Download or read book Sea Surface Topography and the Geoid written by Hans Sünkel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances and techniques in precise geoid determination are presented with a discussion of their implication for geophysical and oceanographic research, as well as identification and formulation of a goal on which future geoid research should focus. The volume is divided into the following sections: - The Geoid - Sea Surface Topography - The Vertical Datum - Miscellaneous
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 1989 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravity and Geoid written by Hans Sünkel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recognizing the increasing importance of the role of gravity and the geoid, and con sidering the substantial synergistic effects which result from close cooperation, the International Gravity Commission and the International Geoid Commission, both scientific bodies of the International Association of Geodesy, decided to hold a Joint Meeting under the common topic "Gravity and Geoid" in Graz, Austria, from Sept. 11 - 17, 1994. The earth's gravity field is increasingly attracting the attention of the geosciences for many reasons. As a response of the earth's internal mass distribution, it significantly helps us to understand the structure of the earth and its dynamics. On the other hand, the earth's gravity field controls the orbits of satellites and is of paramount im portance for accurate orbit prediction'. For geodesy the geoid, representing the gravity field, serves as a unique height reference surface. It is the link between satellite-derived positions and useful geodetic coordinates of utmost precision. For oceanography, the offset of the dynamic ocean surface from the geoid is the signal which bears important information about ocean circulation patterns.
Book Synopsis Satellite Altimetry and Earth Sciences by : Lee-Lueng Fu
Download or read book Satellite Altimetry and Earth Sciences written by Lee-Lueng Fu and published by Elsevier. This book was released on 2000-11-09 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new level of precision and global coverage provided by satellite altimetry is rapidly advancing studies of ocean circulation. It allows for new insights into marine geodesy, ice sheet movements, plate tectonics, and for the first time provides high-resolution bathymetry for previously unmapped regions of our watery planet and crucial information on the large-scale ocean features on intra-season to interannual time scales. Satellite Altimetry and Earth Sciences has integrated the expertise of the leading international researchers to demonstrate the techniques, missions, and accuracy of satellite altimetry, including altimeter measurements, orbit determination, and ocean circulation models.Satellite altimetry is helping to advance studies of ocean circulation, tides, sea level, surface waves and allowing new insights into marine geodesy. Satellite Altimetry and Earth Sciences provides high resolution bathymetry for previously unmapped regions of our watery planet.Satellite Altimetry and Earth Sciences is for a very broad spectrum of academics, graduate students, and researchers in geophysics, oceanography, and the space and earth sciences. International agencies that fund satellite-based research will also appreciate the handy reference on the applications of satellite altimetry.
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Oceanographic Applications of Remote Sensing by : Motoyoshi Ikeda
Download or read book Oceanographic Applications of Remote Sensing written by Motoyoshi Ikeda and published by CRC Press. This book was released on 1995-09-18 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oceanographic Applications of Remote Sensing describes how remotely sensed data fields can be applied to help solve problems in ocean-related studies. This timely reference, written by and for oceanographers, emphasizes the application of data to particular physical, chemical, and biological processes related to the ocean and the ocean-atmosphere system. The organization of the book reflects this emphasis, with chapters arranged by process rather than by sensor characteristics. Oceanographic Applications of Remote Sensing contains comprehensive information on the application of such relevant data sets as sea surface temperature and topography, ocean circulation, sea level variability, wind speed and stress, wave height, solar radiation flux at ocean surfaces, and sea-ice characteristics and ice motion. It also discusses the reliability of remotely sensed data and provides information about the applicability of the various data sets to particular process studies. Its completeness and relevance makes Oceanographic Applications of Remote Sensing an important reference for modern studies of ocean and coupled ocean-atmosphere processes. Its unique coverage of the physics that govern satellite processes and their applications to oceanography ensures that it will remain an important reference as new satellites are introduced.
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1991-11 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coastal Altimetry by : Stefano Vignudelli
Download or read book Coastal Altimetry written by Stefano Vignudelli and published by Springer Science & Business Media. This book was released on 2011-01-03 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes experience in application of coastal altimetry to different parts of the World Ocean. It presents the principal problems related to the altimetry derived products in coastal regions of the ocean and ways of their improvement. This publication is based on numerous satellite and observational data collected and analyzed by the authors of the various chapters in the framework of a set of international projects, performed in UK, France, Italy, Denmark, Russia, USA, Mexico and India. The book will contribute both to the ongoing International Altimeter Service effort and to the building of a sustained coastal observing system in the perspective of GMES (Global Monitoring for Environment and Security) and GEOSS (Global Earth Observation System of Systems) initiatives. This book is aimed at specialists concerned with research in the various fields of satellite altimetry, remote sensing, and coastal physical oceanography. The book will be also interesting for lecturers, students and post-graduate students.
Book Synopsis From Mars to Greenland: Charting Gravity With Space and Airborne Instruments by : Oscar L. Colombo
Download or read book From Mars to Greenland: Charting Gravity With Space and Airborne Instruments written by Oscar L. Colombo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precise and continuous tracking with multi-satellite systems of aircraft andlow flying satellites, accurate airborne measurement of gravity and gravity gradients, and satellite gradiometry have fundamentally changed our view on the de- termination of the Earth's gravity field. The papers in this volume describe these techniques in detail. The ideas are presentedas complementary, and are used to develop new theoretical concepts of gravity field analysis. Computatio- nal models using these techniques are also discussed and are tested in simulations. The papers presented in this volume are the result of an IAG symposium held during the XX General Assembly of the Inter- national Union of Geodesy and Geophysics in Vienna, Austria, August 11-24, 1991.
Book Synopsis Gravimetry and Space Techniques Applied to Geodynamics and Ocean Dynamics by : Bob E. Schutz
Download or read book Gravimetry and Space Techniques Applied to Geodynamics and Ocean Dynamics written by Bob E. Schutz and published by American Geophysical Union. This book was released on 1994-01-10 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 82. The variety of disciplines represented in this volume (including space geodesy, oceanography, geophysics, and celestial mechanics) attest to the interdisciplinary applications of gravimetry and space techniques. The relation to sea level is addressed within some of the papers and the contributions of the techniques to development of global gravity models are discussed. The space technique of satellite altimetry has become a prominent contributor to sea surface topography as well as ocean tide models and determination of gravity, especially in ocean areas. Ocean tides influence the motion of near-Earth satellites and the rotation of the Earth. Modern space geodesy is increasingly relying on the Global Positioning System for measuring geophysical phenomena manifested at the surface through crustal deformations. Furthermore, the geophysical interpretation of gravity anomalies has been facilitated by the introduction of modern techniques. This volume represents only a small "snapshot" of the interdisciplinary research being conducted. Modem space geodesy is one of the common links between the disciplines reflected in this volume. New developments in gravimetry and space techniques will further enhance and foster interdisciplinary work in coming years.
Book Synopsis Geoid Determination by : Fernando Sansò
Download or read book Geoid Determination written by Fernando Sansò and published by Springer Science & Business Media. This book was released on 2013-02-13 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will be based on the material of the lecture noties in several International Schools for the Determination and Use of the Geoid, organized by the International Geoid Serivice of the International Association of Geodesy. It consolidates, unifies, and streamlines this material in a unique way not covereed by the few other books that exist on this subjext. More specifically, the book presents (for the first time in a single volume) the theory and methodology of the most common technique used for precise determination of the geoid, including the computation of the marine geoid from satellite altimetry data. These are illustrated by specific examples and actual computations of local geoids. In addition, the book provides the fundamentals of estimating orthometric heights without spirit levelling, by properly combining a geoid with heights from GPS. Besides the geodectic and geophysical uses, this last application has made geoid computation methods very popular in recent years because the entire GPS and GIS user communities are interested in estimating geoid undulations in order to convert GPS heights to physically meaningful orthometric heights (elevations above mean sea level). The overall purpose of the book is, therefore, to provide the user community (academics, graduate students, geophysicists, engineers, oceanographers, GIS and GPS users, researchers) with a self-contained textbook, which will supply them with the complete roadmap of estimating geoid undulations, from the theoretical definitions and formulas to the available numerical methods and their implementation and the test in practice.
Book Synopsis Radial Orbit Error Reduction and Sea Surface Topography Determination Using One Year of GEOSAT Altimeter Data by : Heiner Denker
Download or read book Radial Orbit Error Reduction and Sea Surface Topography Determination Using One Year of GEOSAT Altimeter Data written by Heiner Denker and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Global Gravity Field and Its Temporal Variations by : Richard H. Rapp
Download or read book Global Gravity Field and Its Temporal Variations written by Richard H. Rapp and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: In July 1995 the XXI General Assembly of the International Union of Geodesy and Geophysics was held in Boulder, Colorado. At this meeting the International Association of Geodesy (lAG) organized a number of symposia to discuss scientific developments and future directions in a number of areas. One of these symposia was G3, Global Gravity Field and Its Temporal Variations. This symposium consisted of four invited and 36 contributed papers. The contributed papers were given as oral or poster presentations. This proceedings volume represents the written contributions of the four invited papers (appearing as the first four papers in the volume) and 19 additional papers. The authors were asked to limit the length of their paper to approximately ten pages, which, in some cases, did limit what an author wanted to say. The papers in this volume have been placed in the same order as they were presented at the ruGG meeting. A key theme of the symposium is given in the paper by Nerem, Klosko, and Pavlis where they discuss applications of gravity field information in geodesy and oceanography. The significant achievements in determining the gravity field in the ocean areas from satellite altimeter data is discussed by Sandwell, Yale, McAdoo, and Smith. A review of time changes of the Earth's gravity field from terrestrial measurements is given by Lambert et aI. , and from satellite perturbation techniques by Eanes and Bettadpur. A description of new geopotential models is given in the paper by Tapley et al.
Book Synopsis Interactions Between Physics and Dynamics of Solar System Bodies by : E. Bois
Download or read book Interactions Between Physics and Dynamics of Solar System Bodies written by E. Bois and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fans of "Asterix the Gallic" know well that the only fear of people in Brittany is that the sky falls upon their head. So it must have been a shock for them (the fans of Asterix) to learn that a horde of Physicists and Dynamicists (some of them being actually Roman - ils sont fous ces Romains!) invaded the bay of Saint-Brieuc and spend a full week conjuring all the nastiness that the sky has in reserve, revelling in the horrors hidden beyond the blue dome; they talked with delight about "asteroids", "comets" and "meteor streams"; they grinned at the idea of "artificial satellites", these pots and pans of space always ready to fall upon you; some of them said strange things about the Moon, the planets, and evoked the "rings" of Saturn or of some other of their gods. One evening, a Roman from Pisa went as far as cornering some inhabitants in the large hut they used for their witchcraft and filled them with terror by describing the fate of the poor dinosaurs victims of a particularly nasty asteroid (or was it a comet?). You will be surprized to learn that Bretons did not exact a spectacular revenge for these offenses. On the contrary.
Book Synopsis The Ohio State 1991 Geopotential and Sea Surface Topography Harmonic Coefficient Models by : Richard H. Rapp
Download or read book The Ohio State 1991 Geopotential and Sea Surface Topography Harmonic Coefficient Models written by Richard H. Rapp and published by . This book was released on 1991 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geodesy written by Wolfgang Torge and published by Walter de Gruyter GmbH & Co KG. This book was released on 2015-08-31 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a systematic overview of the fundamental theories, frameworks and methods for measurement and evaluation applying to geodesy, though the contribution of geodetic spatial techniques for positioning and for establishing the gravitational field receives particular emphasis. These methods have led to a change in the setting up of geodetic basic networks that is also of importance in practical terms; for interdisciplinary geodynamics research geodesy can likewise make major contributions with their assistance. The current status of geodesy is illustrated by numerous examples from survey, evaluation and analysis; an extensive literature list makes further study all the easier. The book conveys an extensive overview of the profound changes that geodesy has undergone in the past twenty years.
