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Combination Of Satellite Altimetric Data In The Short Arc Mode And Gravity Anomaly Data
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Book Synopsis Combination of Satellite Altimetric Data in the Short Arc Mode and Gravity Anomaly Data by : George Hadgigeorge
Download or read book Combination of Satellite Altimetric Data in the Short Arc Mode and Gravity Anomaly Data written by George Hadgigeorge and published by . This book was released on 1977 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The computer program SAGG (Satellite Altimetry and Ground Gravity) has been used to determine the global geoid and the earth's gravity field, based on the combination of altimetric observations and gravity anomalies. A typical feature of SAGG is the simultaneous recovery of the orbit parameters and the spherical harmonic potential coefficients. The short arc adjustment mode makes these determinations possible without the requirement of highly precise reference orbits. In this mode, the state vector components are subject to adjustment and represent, in fact, a set of independent weighted parameters. Orbits good to approximately 20 m are adequate for precise reductions. Altimetric data processed by SAGG was gathered by the GEOS-3 satellite over adjacent portions of the Indian and South Pacific Oceans and a portion of the NORTH Atlantic; gravity anomaly data is represented by mean anomalies from over 2200 1 deg x 1 deg geographic blocks. The recovered geoid over most of the globe shows good agreement with gravimetric geoids. This is especially true of the areas covered by GEOS-3 when compared with the earlier reported results of the AFGL computer program SARRA (Short Arc Reduction of Radar Altimetry).
Book Synopsis Combination of Satellite Altimetric Data in the Short Arc Mode and Gravity Anomaly Data by : George Hadgigeorge
Download or read book Combination of Satellite Altimetric Data in the Short Arc Mode and Gravity Anomaly Data written by George Hadgigeorge and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The computer program SAGG (Satellite Altimetry and Ground Gravity) has been used to determine the global geoid and the earth's gravity field, based on the combination of altimetric observations and gravity anomalies. A typical feature of SAGG is the simultaneous recovery of the orbit parameters and the spherical harmonic potential coefficients. The short arc adjustment mode makes these determinations possible without the requirement of highly precise reference orbits. In this mode, the state vector components are subject to adjustment and represent, in fact, a set of independent weighted parameters. Orbits good to approximately 20 m are adequate for precise reductions. Altimetric data processed by SAGG was gathered by the GEOS-3 satellite over adjacent portions of the Indian and South Pacific Oceans and a portion of the NORTH Atlantic; gravity anomaly data is represented by mean anomalies from over 2200 1 deg x 1 deg geographic blocks. The recovered geoid over most of the globe shows good agreement with gravimetric geoids. This is especially true of the areas covered by GEOS-3 when compared with the earlier reported results of the AFGL computer program SARRA (Short Arc Reduction of Radar Altimetry)
Book Synopsis Combination of Satellite Altimetric Data in the Short Arc Mode and Gravity Anomaly Data by : George Hadgigeorge
Download or read book Combination of Satellite Altimetric Data in the Short Arc Mode and Gravity Anomaly Data written by George Hadgigeorge and published by . This book was released on 1977 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Refinements in the Combined Adjustment of Satellite Altimetry and Gravity Anomaly Data by : Georges Blaha
Download or read book Refinements in the Combined Adjustment of Satellite Altimetry and Gravity Anomaly Data written by Georges Blaha and published by . This book was released on 1977 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important objectives accomplished during the present analysis has been the upgrading of the AFGL computer program SAGG (Satellite Altimetry and Ground Gravity). This program serves in the determination of the global geoid and the earth's gravity field, based on the combination of satellite altimetry observations and gravity anomalies. A typical feature of SAGG is the simultaneous recovery of both the orbital parameters and the spherical harmonic potential coefficients. The short arc adjustment mode makes these determinations possible without the requirement of highly precise reference orbits. An important refinement in SAGG has been the differentiation of the radial distance to a sub-satellite geoidal point with respect to the state vector parameters. A practical benefit of this feature is faster convergence in the adjustment. The new version of SAGG has been used in a combined adjustment of real data, in conjunction with a (14, 14) geopotential model. Comparison of internal precision has demonstrated the beneficial effect of adding altimetry data to the existing body of gravity anomaly data. The recovered geoid over most of the globe shows good agreement with gravimetric geoids obtained from independent sources. This is especially true of the areas covered by the GEOS-3 satellite when compared with the earlier reported results of the AFGL computer program SARRA.
Download or read book Environmental Research Papers written by and published by . This book was released on 1977 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Local Geoid and Gravity Anomaly Predictions Using Point Masses by : Georges Blaha
Download or read book Local Geoid and Gravity Anomaly Predictions Using Point Masses written by Georges Blaha and published by . This book was released on 1979 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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 1978 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Report on Research at AFCRL. by : Air Force Cambridge Research Laboratories (U.S.)
Download or read book Report on Research at AFCRL. written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1976 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Non-global Recovery of Gravity Anomalies from a Combination of Terrestrial and Satellite Altimetry Data by : S. Gopalapillai
Download or read book Non-global Recovery of Gravity Anomalies from a Combination of Terrestrial and Satellite Altimetry Data written by S. Gopalapillai and published by . This book was released on 1974 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two methods for recovery of gravity anomalies are described. Of those, the indirect method, based on the use of the Stokes' formula is chosen for its flexibility in combining any a priori information available on the anomalies and in filtering out any systematic error that may be inherent in the observations.
Book Synopsis Catalogs of the Scripps Institution of Oceanography Library by : Scripps Institution of Oceanography. Library
Download or read book Catalogs of the Scripps Institution of Oceanography Library written by Scripps Institution of Oceanography. Library and published by . This book was released on 1980 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Non-global Recovery of Gravity Anomalies from a Combination of Terrestial and Satellite Altimetry Data by : S. Gopalapillai
Download or read book Non-global Recovery of Gravity Anomalies from a Combination of Terrestial and Satellite Altimetry Data written by S. Gopalapillai and published by . This book was released on 1974 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A General Combination of Satellite and Gravity Data for Position and Gravity Field Determination by : Ohio State University. Department of Geodetic Science
Download or read book A General Combination of Satellite and Gravity Data for Position and Gravity Field Determination written by Ohio State University. Department of Geodetic Science and published by . This book was released on 1970 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Procedures and Results Related to the Direct Determination of Gravity Anomalies from Satellite and Terrestrial Gravity Data by : Richard H. Rapp
Download or read book Procedures and Results Related to the Direct Determination of Gravity Anomalies from Satellite and Terrestrial Gravity Data written by Richard H. Rapp and published by . This book was released on 1974 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Directory of Computer Software Applications by : United States. National Technical Information Service
Download or read book A Directory of Computer Software Applications written by United States. National Technical Information Service and published by . This book was released on 1978 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography and Index of Geology by :
Download or read book Bibliography and Index of Geology written by and published by . This book was released on 1979 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SEASAT Altimetry Adjustment Model Including Tidal and Other Sea Surface Effects by : Georges Blaha
Download or read book SEASAT Altimetry Adjustment Model Including Tidal and Other Sea Surface Effects written by Georges Blaha and published by . This book was released on 1981 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is a part of the on-going effort aimed at improved determinations of the earth's gravity field through the adjustment of satellite altimeter data in the short-arc mode. Until recently the key role in such adjustments has been played by GEOS-3 altimeter data. However, SEASAT altimetry is envisioned as providing a more accurate means for addressing this task. In view of the improved quality of altimeter data and of the corresponding more stringent requirements for the data reduction, several improvements in the existing altimetry model have been designed and are described herein. For example, the criteria have been established specifying the maximum and the mimimum allowable lengths of SEASAT arcs. An important improvement in the economy has been achieved through a reduction in the number of spherical-harmonic potential coefficients entering the orbital integrator, without a noticeable compromise in the excellent quality of the SEASAT observational system.