Global ETD Search
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Showing 1 to 19 of 19 for “"Topex"”.
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Aplicacoes da altimetria topex/poseidon no estudo de aspectos dinamicos do oceano atlantico sul ocidental
Dados altimétricos do satélite TOPEX/POSEIDON obtidos durante 1993 e 1994 foram utilizados para estudar a dinâmica oceanográfica na região oeste do oceano Atlântico Sul, entre as latitudes de 15°S e 50°S e longitudes de 30°W e 65°W. Simultaneamente, dados hidrográficos (históricos e sinópticos) e …
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Various techniques and procedures for refining ERS-1 orbits
… second satellite; in these examples SPOT-2 and TOPEX/Poseidon are employed. With SPOT-2 the method makes use of the orbital similarities to produce along-track corrections for the more fully tracked SPOT-2. Transferring these corrections to ERS-1 produces improvements in the precise orbits thus …
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Study of the Origins of the Sigma-0 Blooms
The TOPEX/POSEIDON Project is a joint U.S. and French mission to develop and operate an Earth orbiting satellite capable of making accurate measurements of the mean sea level in a way that allows the study of ocean dynamics. The understanding of ocean dynamics is very important in order to study …
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Adaptive error estimation in linearized ocean general circulation models
… in the North Pacific (5°-60° N, 132°-252° E) to TOPEX/POSEIDON sea level anomaly data, acoustic tomography data from the ATOC project, and the MIT General Circulation Model (GCM). A reduced state linear model that describes large scale internal (baroclinic) error dynamics is used. The MT method, …
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Adaptive error estimation in linearized ocean general circulation models
… in the North Pacific (5°-60° N, 132°-252° E) to TOPEX/POSEIDON sea level anomaly data, acoustic tomography data from the ATOC project, and the MIT General Circulation Model (GCM). A reduced state linear model that describes large scale internal (baroclinic) error dynamics is used. The MT method, …
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Satellite borne radar altimetry : empirical orbit refinement and ocean signal recovery techniques
… a significant mesoscale ocean signal. The use of TOPEX/Poseidon dual crossovers with ERS-1 was shown to substantially improve the radial accuracy of ERS-1, except for some absorption of small TOPEX/Poseidon errors. The extraction of marine geoid information is of great interest to the …
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Annual cycle of the Benguela Jet
… as best suited to study the Benguela Jet: the Topex-A / Jason-1A Track number 209 which crosses the Benguela Jet current in its northern region off the Cape Columbine and the Topex-B / Jason-1B track number 31, which crosses the Benguela Jet current in the southern region. The month of January …
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The evolution of upper ocean thermal structure at 10°N, 125°W during 1997-1998
… program. Analysis based on the PACS data set, TOPEX/Poseidon sea surface height data, European Remote Sensing satellite wind data, and model simulations and experiments reveals that the dominant mechanisms affecting the thermocline depth and SST at the mooring site during the measurement period …
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The evolution of upper ocean thermal structure at 10⁰N, 125⁰W during 1997-1998
… program. Analysis based on the PACS data set, TOPEX/Poseidon sea surface height data, European Remote Sensing satellite wind data, and model simulations and experiments reveals that the dominant mechanisms affecting the thermocline depth and SST at the mooring site during the measurement period …
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Upper-ocean influences on hurricane intensification modeling
… be determined. The Ocean Topography Experiment (TOPEX) provides an opportunity for the model to be tested through the use of satellite altimetry. Measurements of the mixed layer depth and upper-ocean heat content are incorporated into the model for Hurricanes Bret, Gert, Opal, Mitch and Dolly. …
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Studies to Improve Estimation of the Electromagnetic Bias in Radar Altimetry
… the highly successful gathering of data which TOPEX/Poseidon has collected since August of 1992. The main goal of Jason-1 is to achieve higher accuracy in measuring the mean sea level (MSL). In order to do so, the electromagnetic (EM) bias must be estimated more accurately because it is the …
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Ocean Tides Modeling using Satellite Altimetry
… two decades, particularly after the launch of TOPEX/POSEIDON satellite. This geophysical record enables numerous scientific studies or discoveries, including improved global ocean tide modeling. Several contemporary ocean tide models have been determined either through the assimilation of …
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Global barotropic variability of the ocean in response to atmospheric forcing based on multichannel regression and Kalman filter techniques
TOPEX/POSEIDON altimetry data are employed in the analysis of the global ocean response to atmospheric forcing. We use two different approaches to test the hypothesis that the global sea surface height variability can be adequately described by linear barotropic ocean models: the multichannel …
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The Southern Ocean meridional overturning circulation as diagnosed from an eddy permitting state estimate
… altimetric observations (ENVISAT, GEOSAT, Jason, TOPEX/Poseidon), and other data sets (e.g. infrared and microwave radiometer observed sea surface temperature and NSIDC sea-ice concentration). Costs attributed to control variable perturbations ensure a physically realistic solution. The state …
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The southern ocean meridional overturning circulation as diagnosed from an eddy permitting state estimate
… altimetric observations (ENVISAT, GEOSAT, Jason, TOPEX/Poseidon), and other data sets (e.g. infrared and microwave radiometer observed sea surface temperature and NSIDC sea-ice concentration). Costs attributed to control variable perturbations ensure a physically realistic solution. The state …
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Subduction in an eddy-resolving state estimate of the northeast Atlantic Ocean
… observations from the Subduction Experiment, TOPEX/POSEIDON altimetry, and the MIT General Circulation Model. A novel aspect of this work is the search for an initial eddy field and eddy-scale open boundary conditions by the use of an adjoint model. The adjoint model for this region of the …
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Radiation force modeling for ICESat precision orbit determination
… included a box-and-wing model, representing the TOPEX/Poseidon satellite, to compute solar radiation forces. This “macro-model” has been adapted to the ICESat geometry, and additionally, extended to the calculation of forces induced by radiation reflected and emitted from the Earth. To determine …
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Subduction in an eddy-resolving state estimate of the northeast Atlantic Ocean
… observations from the Subduction Experiment, TOPEX/POSEIDON altimetry, and the MIT General Circulation Model. A novel aspect of this work is the search for an initial eddy field and eddy-scale open boundary conditions by the use of an adjoint model. The adjoint model for this region of the …
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Improving Electromagnetic Bias Estimates
… (EM) bias is the largest source of error in the TOPEX/Poseidon and Jason-1 satellite sea surface height (SSH) estimates. Due to incomplete understanding of the physical processes which cause the bias, current operational models are based on empirical relationships between the bias wind speed and …