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Author: Paul Denis Thomas
Publisher:
ISBN:
Category : Artificial satellites in surveying
Languages : en
Pages : 40
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Author: Paul Denis Thomas
Publisher:
ISBN:
Category : Artificial satellites in surveying
Languages : en
Pages : 40
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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309163293
Category : Science
Languages : en
Pages : 157
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Book Description
Geodesy is the science of accurately measuring and understanding three fundamental properties of Earth: its geometric shape, its orientation in space, and its gravity field, as well as the changes of these properties with time. Over the past half century, the United States, in cooperation with international partners, has led the development of geodetic techniques and instrumentation. Geodetic observing systems provide a significant benefit to society in a wide array of military, research, civil, and commercial areas, including sea level change monitoring, autonomous navigation, tighter low flying routes for strategic aircraft, precision agriculture, civil surveying, earthquake monitoring, forest structural mapping and biomass estimation, and improved floodplain mapping. Recognizing the growing reliance of a wide range of scientific and societal endeavors on infrastructure for precise geodesy, and recognizing geodetic infrastructure as a shared national resource, this book provides an independent assessment of the benefits provided by geodetic observations and networks, as well as a plan for the future development and support of the infrastructure needed to meet the demand for increasingly greater precision. Precise Geodetic Infrastructure makes a series of focused recommendations for upgrading and improving specific elements of the infrastructure, for enhancing the role of the United States in international geodetic services, for evaluating the requirements for a geodetic workforce for the coming decades, and for providing national coordination and advocacy for the various agencies and organizations that contribute to the geodetic infrastructure.
Author:
Publisher:
ISBN:
Category : Geodesy
Languages : en
Pages : 250
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Author: Krzysztof Sośnica
Publisher: Astronomical Institute, University of Bern, Switzerland
ISBN: 8393889804
Category : Science
Languages : en
Pages : 253
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Book Description
The contribution of Satellite Laser Ranging (SLR) to the definition of the origin of the reference frame (geocenter coordinates), the global scale, and low degree coefficients of the Earth's gravity field is essential due to the remarkable orbit stability of geodetic satellites and the accuracy of laser observations at a level of a few millimeters. Considering these aspects, SLR has an exceptional potential in establishing global networks and deriving geodetic parameters of the supreme quality. SLR faces today the highest requirements of the Global Geodetic Observing System (GGOS) yielding 1 mm of long-term station coordinate and 0.1 mm/y of station velocity stability. The goal of this work is to assess the contribution of the latest models and corrections to the SLR-derived parameters, to enhance the quality and reliability of the SLR-derived products, and to propose a new approach of orbit parameterization for low orbiting geodetic satellites. The impact of orbit perturbations is studied in detail, including perturbing forces of gravitational origin (Earth's gravity field, ocean and atmosphere tides) and perturbing forces of non-gravitational origin (atmospheric drag, the Yarkovsky effect, albedo and Earth's infrared radiation pressure). A multi-satellite combined solution is obtained using SLR observations to LAGEOS-1, LAGEOS-2, Starlette, Stella, and AJISAI. The quality of the SLR-derived parameters from the combined solution is compared with external solutions. The Earth rotation parameters are compared to the IERS-08-C04 series and the GNSS-derived series, whereas the time variable Earth's gravity field coefficients are compared to the CHAMP and GRACE-derived results.
Author: National Ocean Survey. Physical Science Services Branch
Publisher:
ISBN:
Category : Aeronautical charts
Languages : en
Pages : 62
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Author:
Publisher:
ISBN:
Category : Geodesy
Languages : en
Pages : 424
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Author: Erwin Schmid
Publisher:
ISBN:
Category : Coordinate transformations
Languages : en
Pages : 16
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Author:
Publisher:
ISBN:
Category : Cartography
Languages : en
Pages : 702
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Book Description
Author: Tokuji Utsu
Publisher:
ISBN:
Category : Earthquake prediction
Languages : en
Pages : 16
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Book Description
Author: United States. Department of Commerce. Office of Publications Management
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 60
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Book Description
