NDLI: Gravsat error analysis by means of global spectral analyses of the marine geoid from seasat altimeter data

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Gravsat error analysis by means of global spectral analyses of the marine geoid from seasat altimeter data

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1982
Description	The geographical variability of short wavelength geoid power spectra (geoid roughness), was mapped for the world's oceans between latitudes 72 deg N and 72 deg S. A spectral analysis of SEASAT altimeter data, reduced to sea surface heights, was performed at 2 minute intervals for 15 consecutive days of the 3-day repeat orbit. The geoid roughness represented by these spectra for wavelengths shorter than about 220 km is separated from the total sea height variance and is displayed in the form of a global contour map. The global average geoid roughness is 32 cm RMS, varying from a high in excess of 2 m RMS near deep ocean trenches to a low of 2 cm RMS in the southeast Pacific near the East Pacific Rise. This average value agrees well with previous estimates based on gravimetry and GEOS-3 altimetry. In general, the smoothest areas in the marine geoid overlie relatively young seafloor adjacent mid-ocean spreading centers, where even short-wavelength topographic variations tend to be isostatically compensated.
File Size	4456988
Page Count	39
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19830007477
Archival Resource Key	ark:/13960/t6644k70c
Language	English
Publisher Date	1982-04-29
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Satellite-borne Instruments Sea Roughness Error Analysis Earth Resources Program Power Spectra Spectrum Analysis Seasat 1 Radio Altimeters Ocean Surface Geoids Geopotential Research Mission Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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