Download or read book Comparison of Satellite Geoids and Anomaly Fields written by Helmut Moritz and published by . This book was released on 1966 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Satellite Geoids and Anomaly Fields written by Richard H. Rapp and published by . This book was released on 1967 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various determinations of the harmonic coefficients in the expansion of the earth's gravitational field have been compared in terms of geoids and gravity anomalies. The most recent satellite solution of Anderle agrees fairly well (when comparing common coefficients) with the Gaposchkin solution (RMS difference = plus or minus 5.9 m) but does not agree well with the recent Kaula field from combined satellite and terrestrial data (RMS difference = plus or minus 9.2 m). Estimates made of the effect of the higher-order terms on the undulation values were used to estimate the over-all accuracy figure for current solutions as plus or minus 9.9 m. The error committed by neglecting terms higher than n=8 was estimated as plus or minus 6 m; beyond n=12, plus or minus 4 m; and beyond n=15, plus or minus 3 m. Comparisons of the solutions for various size blocks showed better agreement, the larger the blocks. Accuracy estimates for mean anomaly evaluations from the current satellite solutions were: 5 degrees x 5 degrees, plus or minus 15 mgal; 10 degrees x 10 degrees, plus or minus 12 mgal; 15 degrees x 15 degrees, plus or minus 10 mgal; 20 degrees x 20 degrees, plus or minus 7 mgal; and 30 degrees x 30 degrees, plus or minus 3 mgal. Comparisons of the satellite anomalies were also made to terrestrial anomalies in 5 degrees x 5 degrees and 30 degrees x 30 degrees blocks. The 5 degree comparison was used to demonstrate a method for the determination of equatorial gravity. (Author).
Download or read book Comparison of Two Methods for the Combination of Satellite and Gravimetric Data written by Ohio State University. Department of Geodetic Science and published by . This book was released on 1968 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Global Geoid and Gravity Anomaly Predictions Using the Collocation and Point Mass Techniques written by Robert P. Bessette and published by . This book was released on 1984 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: We previously described (14,14) spherical-harmonic global adjustments of satellite altimetry using the AFGL short-arc technique supplemented with point masses to allow incorporation of short-wavelength geoidal detail. Recently, we have also investigated another technique to enhance short-wavelength detail: least squares collocation with noise. Both methods provide a means to determine a high resolution gravity field on a local, regional or global scale. Statistical comparisons of these two methods have been made in selected areas and the results tabulated.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Geoid and World Geodetic System Based on a Combination of Gravimetric Astro geodetic and Satellite Data written by William M. Kaula and published by . This book was released on 1961 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: A world-wide estimate of the gravity field, based on all available gravimetry and extended by Markov analysis using correlation with elevation, was combined with an estimate of the geoid based on astro-geodetic data covering 19% of the earth and with secular and long period variations of the 1957 Beta and 1958 Beta satellite orbits, into a generalization of least-squares adjustments taking correlation into account. The value obtained for the quadratic sum indicated that the estimates of variance and covariance should be increased about 44%. The results obtained include: Equatorial radius, 6378163 + or - 21 m; Flattening, 1/298.24 + or - 0.01; Equatorial gravity, 978043.6 + or - 1.2 milligals (Potsdam system); Datum shifts (with three-dimensional standard deviation) for the Americas system, + or - 35 m; Europe-Africa-Siberia-India system, + or - 38 m; Japan-Korea-Manchuria system, + or - 68 m; Coefficients in the spherical harmonic expression of the gravity field up to the 8th degree; and World-wide geoid heights, with standard deviations varying from + or - 10 m to + or - 22 m. (Author).
Download or read book Geoid and its Geophysical Interpretations written by Petr Vanicek and published by CRC Press. This book was released on 2020-09-23 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geoid and its Geophysical Interpretations explains how an accurate geoid can be constructed and used for a variety of applied and theoretical geophysical purposes. The book discusses existing techniques for geoid computation, recently developed mathematical and computational tools designed for applications, and various interpretations. Principles and results are well illustrated. This book will be an excellent reference for geodesists, geophysicists, geophysical prospectors, oceanographers, and researchers and students in geophysics and geodesy.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geophysical Abstracts written by and published by . This book was released on 1968 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geophysical Abstracts written by Geological Survey (U.S.) and published by . This book was released on 1968 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geoid Heights Geoid Height Differences and Mean Gravity Anomalies from Low low Satellite to satellite Tracking written by Reiner Rummel and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mathematical model for a simultaneous estimation of improved orbital parameters and an approximation of the earth's gravity field from range rate observations in an SST 'low-low' experiment is described. In a somewhat simplified model an error analysis for the estimation of geoid heights, geoid height differences 1 deg x 1 deg mean gravity anomalies is performed employing the least squares collocation method. Investigated is the dependence of the estimated parameters upon the measurement precision, the spatial configuration of the two satellites, the intersatellite distance, and the experiment altitude. In an optimal situation - assuming a range rate precision of + or - ten to the minus 6th power/ms, an intersatellite distance of 250 km, and an experiment altitude of 200 km - the estimated a posteriori std. dev. are + or - 0.9 m for point geoid heights, + or - 0.7 m for geoid height differences (point separation 150 km), and + or - 6 to 7 mgal for 1 deg x 1 deg mean gravity anomalies. These numbers compare very well with the results obtained from GEOS-3 altimetry for the seasurface topography. Unmodelled short-wavelength uncertainties in the orbit have thereby to be controlled down to 1 cm in radial direction, whereas the requirements for the control of long-wavelength error effects are moderate. (Author).
Download or read book On Similarity Transformations and Geodetic Network Distortions Based on Doppler Satellite Observations written by Alfred Leick and published by . This book was released on 1975 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravity Geoid and Height Systems written by Urs Marti and published by Springer. This book was released on 2015-01-13 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book OAR Cumulative Index of Research Results written by and published by . This book was released on 1967 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1970 with total page 1416 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.
Download or read book Gravity Geoid and Space Missions written by Christopher Jekeli and published by Springer Science & Business Media. This book was released on 2005-07-04 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
