Accuracy Of The Determination Of Mean Anomalies And Mean Geoid Undulations From A Satellite Gravity Field Mapping Mission
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Accuracy Of The Determination Of Mean Anomalies And Mean Geoid Undulations From A Satellite Gravity Field Mapping Mission
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-20
Accuracy Of The Determination Of Mean Anomalies And Mean Geoid Undulations From A Satellite Gravity Field Mapping Mission written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-20 with categories.
Improved knowledge of the Earth's gravity field was obtained from new and improved satellite measurements such as satellite to satellite tracking and gradiometry. This improvement was examined by estimating the accuracy of the determination of mean anomalies and mean undulations in various size blocks based on an assumed mission. In this report the accuracy is considered through a commission error due to measurement noise propagation and a truncation error due to unobservable higher degree terms in the geopotential. To do this the spectrum of the measurement was related to the spectrum of the disturbing potential of the Earth's gravity field. Equations were derived for a low-low (radial or horizontal separation) mission and a gradiometer mission. For a low-low mission of six month's duration, at an altitude of 160 km, with a data noise of plus or minus 1 micrometers sec for a four second integration time, we would expect to determine 1 deg x 1 deg mean anomalies to an accuracy of plus or minus 2.3 mgals and 1 deg x 1 deg mean geoid undulations to plus or minus 4.3 cm. A very fast Fortran program is available to study various mission configurations and block sizes. Jekeli, C. and Rapp, R. H. Unspecified Center REPT-307 NGR-36-008-161
Accuracy Of The Determination Of Mean Anomalies And Mean Geoid Undulations From A Satellite Gravity Field Mapping Mission
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Author : Christopher Jekeli
language : en
Publisher:
Release Date : 1980
Accuracy Of The Determination Of Mean Anomalies And Mean Geoid Undulations From A Satellite Gravity Field Mapping Mission written by Christopher Jekeli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Gravity categories.
Global Gravity Field Modeling From Satellite To Satellite Tracking Data
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Author : Majid Naeimi
language : en
Publisher: Springer
Release Date : 2017-02-10
Global Gravity Field Modeling From Satellite To Satellite Tracking Data written by Majid Naeimi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-10 with Science categories.
This book provides a sound theoretical basis for the the different gravity field recovery methods and the numerics of satellite-to-satellite tracking data. It represents lectures given at the ‘Wilhelm and Else Heraeus Autumn School’ in Bad Honnef, Germany, October 4-9, 2015. The emphasis of the school was on providing a sound theoretical basis for the different gravity field recovery methods and the numerics of data analysis. The approaches covered here are the variational equations (classical approach), the acceleration approach and the energy balance approach, all of which are used for global gravity field recovery on the basis of satellite observations. The theory of parameter estimation in satellite gravimetry and concepts for orbit determination are also included. The book guides readers through a broad range of topics in satellite gravimetry, supplemented by the necessary theoretical background and numerical examples. While it provides a comprehensive overview for those readers who are already familiar with satellite gravity data processing, it also offers an essential reference guide for graduate and undergraduate students interested in this field.
Satellite Gravity And The Geosphere
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1997-09-02
Satellite Gravity And The Geosphere written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-09-02 with Science categories.
For the past three decades, it has been possible to measure the earth's static gravity from satellites. Such measurements have been used to address many important scientific problems, including the earth's internal structure, and geologically slow processes like mantle convection. In principle, it is possible to resolve the time-varying component of the gravity field by improving the accuracy of satellite gravity measurements. These temporal variations are caused by dynamic processes that change the mass distribution in the earth, oceans, and atmosphere. Acquisition of improved time-varying gravity data would open a new class of important scientific problems to analysis, including crustal motions associated with earthquakes and changes in groundwater levels, ice dynamics, sea-level changes, and atmospheric and oceanic circulation patterns. This book evaluates the potential for using satellite technologies to measure the time-varying component of the gravity field and assess the utility of these data for addressing problems of interest to the earth sciences, natural hazards, and resource communities.
Nasa Technical Memorandum
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Author :
language : en
Publisher:
Release Date : 1988
Nasa Technical Memorandum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Aeronautics categories.
Local Geoid And Gravity Anomaly Predictions Using Point Masses
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Author : Georges Blaha
language : en
Publisher:
Release Date : 1979
Local Geoid And Gravity Anomaly Predictions Using Point Masses written by Georges Blaha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Altimeter categories.
The point mass technique, which supplements a spherical harmonic expansion of the potential, allows short wavelength detail to be added to previously computed long wavelength geoidal features without distorting the latter. Recently, the AFGL short-arc approach to satellite altimetry has been modified to allow point mass adjustments. GEOS-3 altimeter residuals in the North Atlantic region were obtained from a first adjustment in terms of spherical harmonics and state vector parameters. A subsequent point mass adjustment was performed on these residuals to obtain the short wavelength geoid and gravity anomalies. Advantages of the point mass model stem from a flexible deployment of the new parameters (point mass magnitudes) in an area of interest that permits important computer savings when processing large amounts of satellite data in a local region.
Nasa Geodynamics Program
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Author :
language : en
Publisher:
Release Date : 1981
Nasa Geodynamics Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Geodynamics categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Gravity Geoid And Height Systems
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Author : Urs Marti
language : en
Publisher: Springer
Release Date : 2015-01-13
Gravity Geoid And Height Systems written by Urs Marti and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-01-13 with Science categories.
This volume includes a selection of papers presented at the IAG international symposium "Gravity, Geoid and Height Systems 2012" (GGHS2012), which was organized by IAG Commission 2 “Gravity Field” with the assistance of the International Gravity Field Service (IGFS) and GGOS Theme 1 “Unified Global Height System”. The book summarizes the latest results on gravimetry and gravity networks, global gravity field modeling and applications, future gravity field missions. It provides a detailed compilation on advances in precise local and regional high-resolution geoid modeling, the establishment and unification of vertical reference systems, contributions to gravity field and mass transport modeling as well as articles on the gravity field of planetary bodies.
Gravity Geoid And Space Missions
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Author : Christopher Jekeli
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-07-04
Gravity Geoid And Space Missions written by Christopher Jekeli and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-07-04 with Science categories.
This volume represents the proceedings of the International Symposium on Gravity, Geoid, and Space Missions (GGSM2004), held in Porto, Portugal, 30 August - 3 September 2004. The symposium encompassed the themes of Commission 2 (Gravity Field) of IAG, as well as interdisciplinary topics related to geoid and gravity field, including integration of heterogeneous data and contributions from satellite and airborne techniques. Special focus was on gravity-dedicated satellite missions like CHAMP, GRACE, and GOCE. Projects addressing topographic and ice field mapping using SAR, LIDAR, and laser altimetry, as well as missions and studies related to planetary geodesy were also covered.