نتایج جستجو برای: radar altimetry

تعداد نتایج: 39058  

Journal: :Journal of Geophysical Research 1986

Journal: :Remote Sensing 2016
Jesús Gómez-Enri Andrea Scozzari Francesco Soldovieri Josep Coca Stefano Vignudelli

This article describes an investigation of the new possibilities offered by SAR altimetry compared with conventional altimetry in the detection and characterization of non-ocean targets. We explore the capabilities of the first SAR altimeter installed on the European Space Agency satellite CryoSat-2 for the detection and characterization of ships. We propose a methodology for the detection of a...

Journal: :Environmental monitoring and assessment 2006
Jiqun Zhang Kaiqin Xu Yonghui Yang Lianhui Qi Seiji Hayashi Masataka Watanabe

Although satellite radar altimetry was developed and optimized for open oceans, it has been used to monitor variations in the level of inland water-bodies such as lakes and rivers. Here, for the first time, we have further used the altimetry-derived variation of water level for estimating the fluctuation of water storage as an addition to the present in situ water storage estimation systems to ...

2015
Gary D. Egbert

The principal long term goal of this project is to develop a practical, portable, nested, tidal data assimilation scheme which makes use of all available data (e.g., altimetry data, current moorings, coastal radar) to constrain barotropic and baroclinic tides (especially tidal currents) in coastal areas and shallow seas. A second long term goal is to develop more efficient methods for assimilat...

Journal: :Geophysical Research Letters 2021

We present the first 1992–2020 record of Greenland Ice Sheet (GrIS) mass balance derived from multisatellite Ku-band altimetry. employ an empirical approach as alternative detailed to radar-propagation modeling, and instead convert elevation changes observed by radar altimetry into using spatiotemporal calibration fields. This field is a machine learning that optimizes prediction previously pub...

Journal: :Science 2005
Curt H Davis Yonghong Li Joseph R McConnell Markus M Frey Edward Hanna

Satellite radar altimetry measurements indicate that the East Antarctic ice-sheet interior north of 81.6 degrees S increased in mass by 45 +/- 7 billion metric tons per year from 1992 to 2003. Comparisons with contemporaneous meteorological model snowfall estimates suggest that the gain in mass was associated with increased precipitation. A gain of this magnitude is enough to slow sea-level ris...

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