نتایج جستجو برای: icesat
تعداد نتایج: 506 فیلتر نتایج به سال:
In this study, we present a comparison of coincident GRACE and ICESat data over Antarctica. The analysis focused on the secular changes over a 4-year period spanning from 2003 to 2007, using the recently reprocessed and publicly available data sets for both missions. The results show that the two independent data sets possess strong spatial correlations, but that there are several factors that ...
A decade-long pronounced increase in temperatures the Arctic, especially Barents Sea region, resulted a global warming hotspot over Svalbard. Associated changes cryosphere are consequence and lead to demand for monitoring of glacier changes. This study uses spaceborne laser altimetry data from ICESat ICESat-2 missions obtain ice elevation mass change rates between 2003–2008 2019. Elevation deri...
A series of traverses has been conducted for validation the National Aeronautics and Space Administration Ice, Cloud, land Elevation Satellite 2 (ICESat-2) on flat interior Antarctic ice sheet. Global Navigation System data collected three separate 88S Traverses intersect 20% ICESat-2 reference ground tracks have precisions better than ±7 cm biases less ?4 cm. Data from these were used to asses...
In 2018, the National Aeronautics and Space Administration (NASA) is scheduled to launch the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2), with a new six-beam, green-wavelength, photon-counting lidar system, Advanced Topographic Laser Altimeter System (ATLAS). The primary objectives of the ICESat-2 mission are to measure ice-sheet elevations, sea-ice thickness, and global biomass. Howe...
NASA’s Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) provides exceptional opportunities for characterizing the structure of ecosystems through acquisition along-track, three-dimensional observations. Focusing on canopy cover as a fundamental parameter assessing forest conditions, overall goal this study was to establish framework generating gridded 30 m product with ICESat-2. Specifical...
The Ice, Cloud and Land Elevation Satellite (ICESat) was launched January 13, 2003. The primary purpose of this mission is the determination of inter-annual and long-term changes in polar ice-sheet mass, the causes of changes in mass balance, and the impact of these changes on global sea level. In addition to these objectives, ICESat mission also enables precise measurement of land topography a...
There are an increasing number of digital elevation models (DEMs) available worldwide for deriving elevation differences over time, including vertical changes on glaciers. Most of these DEMs are heavily post-processed or merged, so that physical error modelling becomes difficult and statistical error modelling is required instead. We propose a three-step methodological framework for assessing a...
1 Department of Geography, College of Science, Swansea University, Singleton Park, Swansea, SA28PP, UK; E-mails: [email protected] (N.K.); [email protected] (S.O.L.); [email protected] (P.R.J.N.); [email protected] (J.A.B.R.) 2 Centre for Studies of Carbon Cycle and Climate Interactions (LUCCI), Department of Physical Geography and Ecosystem Science, Lund University, Lund,...
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