首页> 外文会议>Proceedings of 4th international GOCE User workshop. >EVALUATING GOCE DATA NEAR A MID-OCEAN RIDGE AND POSSIBLE APPLICATION TO CRUSTAL STRUCTURE IN SCANDINAVIA
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EVALUATING GOCE DATA NEAR A MID-OCEAN RIDGE AND POSSIBLE APPLICATION TO CRUSTAL STRUCTURE IN SCANDINAVIA

机译:评估中海脊附近的Goce数据,并可能在斯堪的纳维亚地壳结构中应用

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摘要

GOCE gravity fields are assessed in an area aroundrnReykjanes Ridge. Ship gravity measurements werernfound to be to inaccurate to determine possiblernimprovement of GOCE gravity field models comparedrnto the best available GRACE gravity field model.rnDifferences between the GOCE gravity field modelsrnand EGM2008 does not appear to contain a componentrnof the mid-ocean ridge signal. However the differencesrnfollow the Greenland coastline, which could indicaternsmall errors in EGM 2008 there as a result of piecingrntogether different gravity field observations.rnA Butterworth bandpass filter was applied torngradiometer observations at orbit height. After filtering,rndifferences between repeat tracks with a magnitude ofrntens of mE are present, which can not be explained byrnposition or attitude of the satellite. In order to reach thernrepeatability that can be expected from GOCErnmeasurements, filtering methods need to improve.rnIt was found that differences between global GRACErnand GOCE gravity field models are small compared tornuncertainty in crustal and upper mantle structure. Thus,rngeophysical inversion studies should focus on therngravity gradient observations in the instrument referencernframe and at orbit height.
机译:在雷克雅尼斯海岭附近地区评估了GOCE重力场。与最佳的GRACE重力场模型相比,发现船舶重力测量的准确性不高,无法确定GOCE重力场模型的改进。rnGOCE重力场模型与EGM2008之间的差异似乎不包含中洋脊信号。然而,由于格陵兰岛海岸线之间的差异,这可能表明由于重力场观测的不同,EGM 2008在那里的误差很小。在轨道高度处,将巴特沃斯带通滤波器应用于辐射计的观测。滤波后,重复轨道之间的差值会达到mE的量级,无法用卫星的位置或姿态来解释。为了达到GOCErn测量可预期的重复性,需要改进过滤方法。研究发现,与地壳和上地幔结构的不确定度相比,全球GRACErn和GOCE重力场模型之间的差异很小。因此,地球物理反演研究应侧重于仪器参考框架和轨道高度的重力梯度观测。

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  • 来源
  • 会议地点 Munich(DE)
  • 作者单位

    Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, the Netherlands,Email:w.vanderwal@tudelft.nl;

    Institute of Geodesy, University of Stuttgart, Geschwister-Scholl-Str. 24D, D-70174, Stuttgart, Germany Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, the Netherlands;

    Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, the Netherlands;

    Institute of Geodesy, University of Stuttgart, Geschwister-Scholl-Str. 24D, D-70174, Stuttgart, Germany;

    Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, the Netherlands;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航天(宇宙航行);物理大地测量、重力测量与地球形状的测定;
  • 关键词

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