Gravity, Geoid and Height Systems - Proceedings of the IAG Symposium GGHS2012, October 9-12, 2012, Venice, Italy
Gravity, Geoid and Height Systems - Proceedings of the IAG Symposium GGHS2012, October 9-12, 2012, Venice, Italy
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重力、大地水准面和高度系统 - IAG 研讨会 GGHS2012 论文集，2012 年 10 月 9-12 日，意大利威尼斯
DOI：
10.1007/978-3-319-10837-7_6
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发表时间：
2014
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影响因子：
--
通讯作者：
Grebenitcharsky R
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作者：
Grebenitcharsky R
由于重力梯度仪的限制，GOCE卫星重力梯度（SGG）需要在测量带宽之外进行滤波。已经提出了几种方法，并在GOCE处理中心内使用，以在频域中过滤沿航迹数据。在这项研究中，我们探讨利用小波在频域和空间域的局部化特性分解，分析和重建重力场信号的SGG数据在不同层次的小波多分辨率分析（WMRA）。该方法也可用于识别和消除GOCE SGG数据中的时间和空间相关误差。WMRA应用于SGG从梯度仪参考系到局部北向系的旋转和SGG张量向下（向上）延续到平均轨道高度。结果表明，在GOCE的平均轨道高度，MWRA有可能提高沿轨道GOCE数据的短波长引力信号内容。
Due to limitations of the gradiometer the GOCE satellite gravity gradients (SGG) require filtering outside the measurement bandwidth. Several methodologies have been proposed and in use within the GOCE processing centre to filter the along-track data in the frequency domain. In this study we investigate the utilization of the localization properties of wavelets in both the frequency and space domains to decompose, analyze and reconstruct the gravity field signal in the SGG data at the different levels of a Wavelet Multi-resolution Analysis (WMRA). This approach can also be used to identify and eliminate temporally and spatially correlated errors in GOCE SGG data. The WMRA is applied in both the rotation of SGGs from the gradiometer reference frame to a local north orientated frame and in the downward (upward) continuation of the SGG tensor to a mean orbital height. Results presented here show that, at the GOCE mean orbital height, the MWRA has the potential to enhance the short-wavelength gravitational signal content of the along-track GOCE data.