Future Benefits Of Time Varying Gravity Missions To Ocean Circulation Studies

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Future Benefits Of Time Varying Gravity Missions To Ocean Circulation Studies

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Author : Chris W. Hughes
language : en
Publisher:
Release Date : 2005

Future Benefits Of Time Varying Gravity Missions To Ocean Circulation Studies written by Chris W. Hughes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Ocean circulation categories.

Future Satellite Gravimetry And Earth Dynamics

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Author : Jakob Flury
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-01-25

Future Satellite Gravimetry And Earth Dynamics written by Jakob Flury 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 2007-01-25 with Science categories.

New and more accurate techniques for satellite gravimetry will be available soon, with promising applications in Earth sciences. With this special issue the authors want to stimulate discussion among Earth scientists on objectives and preferences for future satellite gravimetry missions. This is an urgently needed discussion. Visions for follow-on missions have to be developed today, if they are to be realized within 10 years, given the required preparation time of such satellite missions.

Expected Improvements In Modeling Earth S Time Variable Gravity Field Using Multiple Grace Like Satellite Constellations

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Author : Maxon Vaughn Widner (IV)
language : en
Publisher:
Release Date : 2018

Expected Improvements In Modeling Earth S Time Variable Gravity Field Using Multiple Grace Like Satellite Constellations written by Maxon Vaughn Widner (IV) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.

The Gravity Recovery and Climate Experiment (GRACE) mission has been a principal contributor in the study and quantification of Earth's time-varying gravity field. With continuing missions like GRACE Follow-On and the Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) capitalizing on improved technologies such as laser interferometry and drag-free flying systems, respectively, the temporal aliasing of high frequency geophysical processes is anticipated to be the primary source of errors for future missions. Micro-satellite technology has presented the feasibility of improving the architecture of future missions with the implementation of a constellation of satellites having similar characteristics as GRACE. Such a configuration is suggested and analyzed to help address these under-sampling errors. The initial series of simulations is designed to build off the current GRACE mission with a near polar orbit, 450 km altitude, but with each satellite spaced approximately 120 km apart. Because of atmospheric and residual ground interference the reliability of ranging data diminishes at greater distances and therefore scenarios involving distances between satellites greater than 1,100 km are not evaluated. A multi-satellite orbit determination package (MSODP) is used to simulate these configurations and the observations corresponding to their orbits. This data is then processed using the Center for Space Research's Advanced Equation Solver for Parallel Systems (AESoP) linear least squares estimator providing high degree and order gravity field map solutions for each case. A sensitivity analysis is performed by varying certain parameters including: satellite spacing, altitude, and technological improvements. The multiple case results are consolidated to help ascertain the most optimal configuration for error reduction. Another series of data is provided from simulations which represent a constellation of satellites in a similar orbit except for the orbital plane being inclined at 72° with the same methodology implemented. This data is then combined in various configurations with the original data set of measurements and compared with the data from the original polar orbit scenario to determine the impact of a second train of satellites and their mitigation of detrimental effects like longitudinal striping. An analysis is performed to quantify the improvements of these configurations and is then evaluated to find optimal parameters for single and multiplane constellations. These results are extrapolated to show their impact on assessing metrics that would most benefit the water market's interests.

Sustaining Ocean Observations To Understand Future Changes In Earth S Climate

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Author : National Academies of Sciences, Engineering, and Medicine
language : en
Publisher: National Academies Press
Release Date : 2017-12-20

Sustaining Ocean Observations To Understand Future Changes In Earth S Climate written by National Academies of Sciences, Engineering, and Medicine 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 2017-12-20 with Science categories.

The ocean is an integral component of the Earth's climate system. It covers about 70% of the Earth's surface and acts as its primary reservoir of heat and carbon, absorbing over 90% of the surplus heat and about 30% of the carbon dioxide associated with human activities, and receiving close to 100% of fresh water lost from land ice. With the accumulation of greenhouse gases in the atmosphere, notably carbon dioxide from fossil fuel combustion, the Earth's climate is now changing more rapidly than at any time since the advent of human societies. Society will increasingly face complex decisions about how to mitigate the adverse impacts of climate change such as droughts, sea-level rise, ocean acidification, species loss, changes to growing seasons, and stronger and possibly more frequent storms. Observations play a foundational role in documenting the state and variability of components of the climate system and facilitating climate prediction and scenario development. Regular and consistent collection of ocean observations over decades to centuries would monitor the Earth's main reservoirs of heat, carbon dioxide, and water and provides a critical record of long-term change and variability over multiple time scales. Sustained high-quality observations are also needed to test and improve climate models, which provide insights into the future climate system. Sustaining Ocean Observations to Understand Future Changes in Earth's Climate considers processes for identifying priority ocean observations that will improve understanding of the Earth's climate processes, and the challenges associated with sustaining these observations over long timeframes.

Earth Gravity Field From Space From Sensors To Earth Sciences

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Author : G. Beutler
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-18

Earth Gravity Field From Space From Sensors To Earth Sciences written by G. Beutler 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 2013-04-18 with Science categories.

Volume resulting from an ISSI Workshop, 11-15 March 2002, Bern, Switzerland

Review Of Nasa S Solid Earth Science Strategy

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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2004-10-13

Review Of Nasa S Solid Earth Science Strategy 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 2004-10-13 with Science categories.

The report reviews NASA's solid-earth science strategy, placing particular emphasis on observational strategies for measuring surface deformation, high-resolution topography, surface properties, and the variability of the earth's magnetic and gravity fields. The report found that NASA is uniquely positioned to implement these observational strategies and that a number of agency programs would benefit from the resulting data. In particular, the report strongly endorses the near-term launch of a satellite dedicated to L-band InSAR measurements of the land surface, which is a key component of the U.S. Geological Survey's hazards mitigation program and the multi-agency EarthScope program.

Satellite Gravity And The Geosphere

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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1997-10-02

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 1997-10-02 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.

Earth Science And Applications From Space

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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2005-10-07

Earth Science And Applications From Space 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 2005-10-07 with Science categories.

The Earth is a dynamic planet whose changes and variations affect our communications, energy, health, food, housing, and transportation infrastructure. Understanding these changes requires a range of observations acquired from a variety of land-, sea-, air-, and space-based platforms. To assist NASA, NOAA, and the USGS develop these tools, the NRC was asked by these agencies to carry out a decadal strategy survey of Earth science and applications from space. In particular, the study is to develop the key scientific questions on which to focus Earth and environmental observations in the period 2005-2015, and a prioritized list of space programs, missions, and supporting activities to address these questions. This interim report outlines a key element of the studyâ€"the rationale for tying Earth observations to societal needâ€"and identifies urgent near-term actions needed to achieve this goal. A final report, due in late 2006, will provide the list of recommended space missions, programs, and supporting.

Gravity Geoid And Geodynamics 2000

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Author : Michael G. Sideris
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29

Gravity Geoid And Geodynamics 2000 written by Michael G. Sideris 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 2013-06-29 with Science categories.

This symposium continued the tradition of mid-term meetings held between the joint symposia of International Geoid and Gravity Commissions. This time, geodynamics was chosen as the third topic to accompany the traditional topics of gravity and geoid. The symposium thus aimed at bringing together geodesists and geophysicists working in the general areas of gravity, geoid and geodynamics. Besides covering the traditional research areas, special attention was paid to the use of geodetic methods for geodynamics studies, dedicated satellite missions, airborne surveys, geodesy and geodynamics of arctic regions, and the integration of geodetic and geophysical information.

Nasa Earth Science

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Author : United States. Congress. House. Committee on Science
language : en
Publisher:
Release Date : 2006

Nasa Earth Science written by United States. Congress. House. Committee on Science and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Political Science categories.