نتایج جستجو برای: gravity acceleration observation and satellite altimetry data

تعداد نتایج: 17078706  

Journal: :Remote Sensing of Environment 2022

Maritime glaciers in the Southeastern Tibetan Plateau (SETP) featuring largest maritime (TP) have been experiencing dramatic mass loss and interannual variability over past two decades, increasing risks of glacier avalanches glacial lake outbursts. However, spatially explicit high-temporal-resolution entire SETP has not well quantified. We developed an approach to integrate satellite altimetry ...

2002
Stephen T. Lowe Cinzia Zuffada Yi Chao Peter Kroger Larry E. Young John L. LaBrecque

[1] We present the first two aircraft Global Positioning System (GPS)-reflection altimetry measurements, the most precise GPS ocean-altimetry measurement, and demonstrate the altimetric precision and spatial resolution necessary to map mesoscale eddies. Our first experiment demonstrated a 14-cm precision single-satellite ocean altimetry measurement while our more recent experiment demonstrates ...

2006
A. A. van Eck van der Sluijs E. Schrama R. Klees

Performance of a recently proposed technique for gravity field modeling has been assessed with data from the CHAMP satellite. The modeling technique is a variant of the acceleration approach. It makes use of the satellite accelerations that are derived from the kinematic orbit with the 3-point numerical differentiation scheme. A 322-day data set with 30-s sampling has been used. Based on this, ...

2013
Romain Escudier Jérôme Bouffard Ananda Pascual Pierre-Marie Poulain Marie-Isabelle Pujol

[1] We present an innovative approach to the generation of remotely sensed high-resolution sea surface topography that improves coastal and mesoscale dynamic characterization. This new method is applied for the period 2002–2010 in the northwestern Mediterranean Sea, an area marked by a small Rossby radius. The spectral content of the new mapped data is closer to that of the along-track signal a...

Journal: :فیزیک زمین و فضا 0
مهدی اسحاق لارش اریک شوبرگ

the dedicated satellite mission goce will sense various small mass variations along its path around the earth. here we study the effect of the earth’s topography and atmosphere on goce data. the effects depend on the magnitude of topographic height, and they will therefore vary by region. as the effect of the atmosphere and topography must be removed from the total gravity anomaly prior to geoi...

2014
Mark E. Tamisiea Chris W. Hughes Simon D. P. Williams Richard M. Bingley

The practical need to understand sea level along the coasts, such as for safe navigation given the spatially variable tides, has resulted in tide gauge observations having the distinction of being some of the longest instrumental ocean records. Archives of these records, along with geological constraints, have allowed us to identify the century-scale rise in global sea level. Additional data so...

2007
Victor Zlotnicki

D I R E C T measurement of large-scale ocean currents with current meter arrays is difficult and costly on basin scales. Since large-scale currents are very nearly in geostrophic balance, their velocity can be calculated from the pressure gradient on an equigeopotential surface. The surface geostrophic current therefore can be calculated from the deviation of sea level from the equigeopotential...

Journal: :Science 2005
Vasily Titov Alexander B Rabinovich Harold O Mofjeld Richard E Thomson Frank I González

Numerical model simulations, combined with tide-gauge and satellite altimetry data, reveal that wave amplitudes, directionality, and global propagation patterns of the 26 December 2004 Sumatra tsunami were primarily determined by the orientation and intensity of the offshore seismic line source and subsequently by the trapping effect of mid-ocean ridge topographic waveguides.

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