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首页> 外文会议>Proceedings of 4th international GOCE User workshop. >COMPARISON OF GOCE DERIVED SATELLITE GLOBAL GRAVITY MODELS WITH EGM2008, THE OCTAS GEOID AND TERRESTRIAL GRAVITY DATA: CASE STUDY FOR NORWAY
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COMPARISON OF GOCE DERIVED SATELLITE GLOBAL GRAVITY MODELS WITH EGM2008, THE OCTAS GEOID AND TERRESTRIAL GRAVITY DATA: CASE STUDY FOR NORWAY

机译：GOCE卫星全球重力模型与EGM2008，OCTAS大地水准面和陆地重力数据的比较：挪威的案例研究

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摘要

Global gravity models composed of a set of sphericalrnharmonic coefficients represent one of the mostrnimportant products of the GOCE satellite gradiometryrnmission. These are of particular interest in many geoscientificrndisciplines dealing with the Earth’s gravityrnfield. At present, four satellite-only global gravityrnmodels based on GOCE observations have been madernavailable to the scientific community. Three of themrnhave been determined by independent strategies usingrnpure GOCE satellite-to-satellite tracking and satelliterngravity gradiometry observations. The fourth model hasrnbeen computed from a combination of GRACE andrnGOCE observations.rnIn this contribution, GOCE derived global gravityrnmodels are compared with EGM2008, the OCTASrngeoid and terrestrial gravity anomalies. We restrict ourrnnumerical study to the territory bounding the continentalrnpart of Norway. Spherical harmonic expansions havernbeen truncated at maximum degree and order 200rncorresponding to a spatial resolution of 100km. Higherrnfrequencies contained in the OCTAS geoid and in thernterrestrial gravity anomalies have been removed byrnexplicitly applying a low-pass filter on the data sets, orrnby removing the signal content of EGM2008 aboverndegree 200.
机译：由一组球谐系数组成的整体重力模型代表了GOCE卫星梯度测量任务最重要的产物之一。这些在涉及地球重力场的许多地球科学学科中特别有意义。目前，已经有四个基于GOCE观测的仅卫星全球重力模型可供科学界使用。其中三个已经通过独立的策略使用纯GOCE卫星到卫星跟踪和卫星重力梯度观测法确定。通过结合GRACE和GOCE观测值计算出了第四个模型。在此贡献中，将GOCE派生的全球重力模型与EGM2008，OCTASgegeoid和地面重力异常进行了比较。我们将数值研究限于挪威大陆部分的领土。球形谐波扩展已被最大程度地截断，阶次为200rn，对应于100km的空间分辨率。 OCTAS大地水准面和地面重力异常中包含的较高频率已通过在数据集上显式应用低通滤波器或通过将EGM2008的信号含量去除到200度以上而消除。

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  • 会议地点 Munich(DE)
  • 作者

    M. ?prlák; C. Gerlach; O. C. D. Omang; B. R. Pettersen;

  • 作者单位

    Institute for Mathematical Sciences and Technology, Norwegian University of Environmental and Life Sciences, ?s,Norway, michal.sprlak@umb.no;

    Institute for Mathematical Sciences and Technology, Norwegian University of Environmental and Life Sciences, ?s,Norway,Commission for Geodesy and Glaciology, Bavarian Academy of Sciences and Humanities, Munich, Germany,gerlach@bek.badw.de;

    Norwegian Mapping Authority, Geodetic Institute, N-3507, H?nefoss, Norway, Ove.Omang@statkart.no;

    Institute for Mathematical Sciences and Technology, Norwegian University of Environmental and Life Sciences, ?s,Norway,bjorn.pettersen@umb.no;

  • 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;
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