Author: John R. Apel
Publisher:
ISBN:
Category : Astronautics in earth sciences
Languages : en
Pages :

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Author:
Publisher:
ISBN:
Category : Astronautics in earth sciences
Languages : en
Pages : 404

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Author: John R. Apel
Publisher:
ISBN:
Category : Astronautics in earth sciences
Languages : en
Pages :

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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 818

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Book Description
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.

Author:
Publisher:
ISBN:
Category : Geodesy
Languages : en
Pages : 492

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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723036453
Category :
Languages : en
Pages : 110

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Book Description
A method for the simultaneous solution of dynamic ocean topography, gravity and orbits using satellite altimeter data is described. A GEM-T1 based gravitational model called PGS-3337 that incorporates Seasat altimetry, surface gravimetry and satellite tracking data has been determined complete to degree and order 50. The altimeter data is utilized as a dynamic observation of the satellite's height above the sea surface with a degree 10 model of dynamic topography being recovered simultaneously with the orbit parameters, gravity and tidal terms in this model. PGS-3337 has a geoid uncertainty of 60 cm root-mean-square (RMS) globally, with the uncertainty over the altimeter tracked ocean being in the 25 cm range. Doppler determined orbits for Seasat, show large improvements, with the sub-30 cm radial accuracies being achieved. When altimeter data is used in orbit determination, radial orbital accuracies of 20 cm are achieved. The RMS of fit to the altimeter data directly gives 30 cm fits for Seasat when using PGS-3337 and its geoid and dynamic topography model. This performance level is two to three times better than that achieved with earlier Goddard earth models (GEM) using the dynamic topography from long-term oceanographic averages. The recovered dynamic topography reveals the global long wavelength circulation of the oceans with a resolution of 1500 km. The power in the dynamic topography recovery is now found to be closer to that of oceanographic studies than for previous satellite solutions. This is attributed primarily to the improved modeling of the geoid which has occurred. Study of the altimeter residuals reveals regions where tidal models are poor and sea state effects are major limitations. Marsh, J. G. and Lerch, F. and Koblinsky, C. J. and Klosko, S. M. and Robbins, J. W. and Williamson, R. G. and Patel, G. B. Goddard Space Flight Center GRAVITATIONAL FIELDS; OCEAN CURRENTS; OCEAN DYNAMICS; OCEAN SURFACE; ORBITAL POSITION ESTIMATION; SATELLITE ALTIMETRY;...

Author: International Association of Geodesy
Publisher:
ISBN:
Category : Geodesy
Languages : en
Pages : 452

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Author: Detlef Stammer
Publisher: CRC Press
ISBN: 1498743463
Category : Science
Languages : en
Pages : 617

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Book Description
Satellite remote sensing, in particular by radar altimetry, is a crucial technique for observations of the ocean surface and of many aspects of land surfaces, and of paramount importance for climate and environmental studies. This book provides a state-of-the-art overview of the satellite altimetry techniques and related missions, and reviews the most-up-to date applications to ocean dynamics and sea level. It also discusses related space-based observations of the ocean surface and of the marine geoid, as well as applications of satellite altimetry to the cryosphere and land surface waters; operational oceanography and its applications to navigation, fishing and defense.

Author: J. Calman
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: American Geophysical Union
Publisher:
ISBN:
Category : Geodesy
Languages : en
Pages : 1136

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Book Description