作者:Zhang, SJ (Zhang, Shengjun)^{[ 1 ]} ; Sandwell, DT (Sandwell, David T.)^{[ 2 ]}

MARINE GEODESY

卷: 40期: 1页: 40-56

DOI: 10.1080/01490419.2016.1265032

出版年: 2017

摘要

The accuracy of the marine gravity field derived from satellite altimetry depends on dense track spacing as well as high range precision. Here, we investigate the range precision that can be achieved using a new shorter wavelength Ka-band altimeter AltiKa aboard the SARAL spacecraft. We agree with a previous study that found that the range precision given in the SARAL/AltiKa Geophysical Data Records is more precise than that of Ku-band altimeter by a factor of two. Moreover, we show that two-pass retracking can further improve the range precision by a factor of 1.7 with respect to the 40 Hz-retracked data (item of range_40 hz) provided in the Geophysical Data Records. The important conclusion is that a dedicated Ka-band altimeter-mapping mission could substantially improve the global accuracy of the marine gravity field with complete coverage and a track spacing of <6 km achievable in similar to 1.3 years. this would reveal thousands of uncharted seamounts on the ocean floor as well as important tectonic features such as microplates and abyssal hill fabric.

关键词

作者关键词:Gravity field; noise level; SARAL/AltiKa; waveform retracking

KeyWords Plus:SATELLITE ALTIMETRY; ICE-SHEET; ERS-1; ANOMALIES; GEOSAT;PERFORMANCE; RESOLUTION; CRYOSAT-2; COASTAL; ALTIKA

作者信息

通讯作者地址: Sandwell, DT (通讯作者)

地址:

电子邮件地址:dsandwell@ucsd.edu

基金资助致谢

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出版商

TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA

类别/分类

研究方向:Geochemistry & Geophysics; Oceanography; Remote Sensing

Web of Science类别:Geochemistry & Geophysics; Oceanography; Remote Sensing

文献信息

文献类型:Article

语种:English

入藏号: WOS:000396540100003

ISSN: 0149-0419

eISSN: 1521-060X

期刊信息

· Impact Factor (影响因子): 0.979