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Satellite Gravity and the Geosphere Contributions to the Study of the Solid Earth and Its Fluid Envelopes (1997) / Chapter Skim
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3 THE GRAVITY FIELD AS A TOOL FOR SCIENCE
Pages 29-34

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From page 29...
... In this chapter we discuss some of the ways in which accurate gravity-field inflation is a vital part of the Earth reference frame and the value a satellite mission would have in the calibration and validation of existing data from gravity-field surveys. REFERENCE FRAME (1~: THE FOUNDATION FOR MEASURING THE CHANGING EARTH The gravity field has conventionally played a critical role in the definition of reference frames that provide the basis for measurement of periodic and stochastic motions in the Earths atmosphere, hydrosphere, lithosphere, and deep interior.
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From page 30...
... ; ~ ac 0 ura: ~ ~ ~ ~ ~ 85 :t ~ i~ t ~ m ~ de ) ~e ~ ~ ~ ~ bCl.,=~t O f ~C ~133 my, mar ~ VIA ~ I: Ire ~ ~ =~ ~ ~ h~s ~ pr.~n of 20~O ~' =d Its abSOlute accuracY 609~$ O~ CO=~5 t0f 6~;\rS ]
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From page 31...
... A satellite gravity mission would provide spatially (nearly) uniform coverage and error distribution, and it would allow correct calibration of archival survey data, adding enormous value to existing data.
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From page 32...
... FUGUE S 1 avid away ~ Isle ~ ~ ~ ~ saw ~ ~1, solid 1- ad aim Away earned am saltily area Cam pixel, ~1~)
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From page 33...
... Therefore, only a satellite gravity mission, such as investigated in this report, can adequately calibrate and validate We existing marine gravity database. CONCLUSIONS Satellite gravity measurements are useful for complementing and supporting other types of measurements.
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Key Terms

  • satellite altimetry
  • satellite gravity
  • reference frame
  • gravity mission
  • bottom panel

  • equipotential surface
  • ocean surface
  • satellite mission
  • marine gravity
  • gravity anomalies

  • anomalies estimated
  • gravity measurements
  • reference frames
  • apparent drift
  • hundred kilometers

  • wrong value
  • mean sea
  • global synthesis
  • shipboard data
  • gravity surveys

  • conventionally played
  • adequately calibrate
  • natural basis
  • field data
  • fundamental reference

  • gravity database
  • currents flowing
  • marine data
  • stochastic motions
  • established worldwide


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