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Topic: TOPEX

    Note: these results are not from the primary (high quality) database.

Jason-1 near real-time applications The extended heat content time series in the study region spanning the entire TOPEX/POSEIDON (T/P) mission is useful for putting into context the warmer conditions observed in the study region that were associated with the 1997-1998 El Niño. The TOPEX and the blended TOPEX/ERS series capture seasonal changes well, including the 1997-1998 El Niño and a smaller spike in heat content near the time of the 3 February 1998 storm that initiated one of the PACJET surveys of opportunity. The TOPEX heat content varies the most, a result of under sampling mesoscale features. topex-www.jpl.nasa.gov /science/invest-born.html

2002 News Releases - Jason 1 Mission Status Jason 1 is now approximately one minute (approximately 370 kilometers or 230 miles) ahead of the Topex/Poseidon satellite, on an identical ground track. Jason 1 will continue Topex/Poseidon's observations of ocean surface topography for monitoring world ocean circulation, studying interactions of the oceans and atmosphere, improving climate predictions and observing events like El Nino. "Jason 1 has begun observations of the same spot of the ocean surface as Topex/Poseidon under nearly identical conditions," said Dr. Lee-Lueng Fu, Jason 1 project scientist at JPL. www.jpl.nasa.gov /releases/2002/release_2002_9.html   (425 words)

Aviso/Altimetry - Presentation: Aviso Alongside data distribution and validation, one of the first actions Aviso undertook was to develop closer coordination with JPL and multiple science teams in order to define and take part in Topex/Poseidon promotional activities, in particular through the Outreach sub-group created within the Science Working Team (SWT). Ever since the Topex/Poseidon satellite was launched in 1992, Aviso has been the link between the Topex/Poseidon and Jason-1 projects, the OCean Altimetry and Climate group, and users. All these activities developed for Topex/Poseidon continue on the Jason-1 mission, with the aim of further improving service for users. www.jason.oceanobs.com /html/presentation/aviso_uk.html   (425 words)

Ocean Surface Topography from Space-Science Chelton, D. B., The sea state bias in altimeter estimates of sea level from collinear analysis of TOPEX data, Journal of Geophysical Research, 99 (C12): 24,995-25,008, Dec. 15, 1994. Minster, J.-F., C. Brossier, and P. Rogel, Variation of the mean sea level from TOPEX/Poseidon data, Journal of Geophysical Research, 100: 25,153-25,161, 1995. Busalacchi, A. McPhaden, and J. Picaut, Variability in equatorial Pacific sea surface topography during the verification phase of the TOPEX/Poseidon mission, Journal of Geophysical Research, 99 (C12): 24,725-24,738, Dec. 15, 1994. topex-www.jpl.nasa.gov /science/investigators-bibliography.html   (11792 words)

gr_regional_chart.cfm?regionid=metu®ion=&reservoir_name=Urmia The USDA/NASA/Raytheon/UMD team acknowledges the AVISO data center at CNES and the NASA Physical Oceanography DAAC for the provision of the TOPEX/POSEIDON and Jason altimetric datasets. Shown above are relative lake height variations computed from TOPEX/POSEIDON (T/P) and Jason-1 altimetry with respect to a 10 year mean level derived from T/P altimeter observations. Lake Urmia (0115) Height Variations from TOPEX/POSEIDON and Jason-1 Altimetry www.pecad.fas.usda.gov /cropexplorer/global_reservoir/gr_regional_chart.cfm?regionid=metu®ion=&reservoir_name=Urmia   (162 words)

Aviso/Altimetry - Altimetry satellites scan the changing oceans : Securing the future of satellite altimetry Satellite altimetry started out in the 1970s and 1980s, but it was not until the launch of Topex/Poseidon in 1992 that the technique really came of age, delivering sea surface height measurements accurate to a few centimeters. The Jason series of satellites now poised to take over from Topex/Poseidon and continue its mission is based on a new design and miniaturized instruments. Today, an altimetry satellite such as Topex/Poseidon can gather more data on ocean circulation in ten days than sailors were able to compile over several centuries. www.jason.oceanobs.com /html/kiosque/dossiers/alti/futur_uk.html   (337 words)

CSR Global mean sea level results -- Related links GSFC/WFF (Goddard Space Flight Center's Wallops Flight Facility - NASA) was responsible for specifying and providing the dual-frequency altimeter which is the prime instrument for the TOPEX/POSEIDON mission. TOPEX Project Home Page at JPL (Jet Propulsion Laboratory - NASA). Range Stability Updates for the TOPEX radar altimeter by GSFC's Wallops Flight Facility. www.csr.utexas.edu:8912 /gmsl/links.html   (337 words)

Stephan D. Howden Wang L.P., C.J. Koblinsky, and S.D. Howden, Annual and Intra-Annual Sea Level Variability in the Region of the Kuroshio Extension from TOPEX/POSEIDON and Geosat Altimetry, Journal of Physical Oceanography,28, 692--711, 1998. Howden, S.D. Gottlieb, C.J. Koblinsky, H.T. Rossby, and L. Wang, Gulf Stream observations from the TOPEX/POSEIDON time series and in comparison with in situ measurements near 71W, Submitted. Wang, L., C.J. Koblinsky, and S.D. Howden, Mesoscale variability in the South China Sea from TOPEX/Poseidon altimetry data, Deep Sea Research, Pt I 47, (4), 681-708, 2000. www.marine.usm.edu /faculty/howden.html   (370 words)

NASA - JPL - Jason 1 It is a follow-on to the Topex/Poseidon mission, which has been measuring ocean topography since 1992. After launch, Jason 1 will fly in tandem with Topex/Poseidon, doubling the science data return for as long as Topex/Poseidon remains in good health. Jason 1 is an oceanography mission to monitor global ocean circulation, study the ties between the oceans and atmosphere, improve global climate forecasts and predictions, and monitor events such as El Niño conditions and ocean eddies. www.nasa.gov /centers/jpl/missions/jason.html   (330 words)

Jason 1 - Wikipedia, the free encyclopedia The Jason 1 satellite altimeter is a science project to measure the ocean surface topography, and the successor to the TOPEX/Poseidon satellite. During the first months Jason 1 shared an almost identical orbit to TOPEX which allowing for cross calibration. At the end of this period TOPEX was moved to a new orbit midway between each Jason ground track. www.wikipedia.org /wiki/Jason_1   (393 words)

CSR Global mean sea level results -- TOPEX/POSEIDON time variations ARIABILITY OF The figure below depicts the temporal variations in global mean sea level computed from TOPEX/POSEIDON over the period from December 1992 to August 1999 (cycles 10-254). CSR Global mean sea level results -- TOPEX/POSEIDON time variations A correction for the drift in the TOPEX Microwave Radiometer has been applied, and the data have been corrected with a tide gauge calibration. www.csr.utexas.edu /gmsl/tptemporal.html   (393 words)

Satellite Radar Altimetry: Global Reservoir and Lake Elevation Database - Lake Urmia Shown above are relative lake height variations computed from TOPEX/POSEIDON (T/P) and Jason-1 altimetry with respect to a 10 year mean level derived from T/P altimeter observations. The USDA/NASA/Raytheon/UMD team acknowledges the AVISO data center at CNES and the NASA Physical Oceanography DAAC for the provision of the TOPEX/POSEIDON and Jason altimetric datasets. Lake Level Variations from TOPEX/POSEIDON and Jason-1 Altimetry www.pecad.fas.usda.gov /cropexplorer/global_reservoir/gr_regional_chart.cfm?regionid=metu®ion=&reservoir_name=Urmia   (172 words)

Ocean Surface Topography from Space-Science Cazenave A., P. Schaeffer, M. Berge, Dominh K. and Gennero M.C. high resolution mean sea surface with the altimeter data of the ERS-1 geodetic mission and Topex-Poseidon, Geophys. Assimilation of TOPEX/Poseidon altimeter data into a global ocean circulation model: How good are the results? Global precipitation statistics from dual-frequency TOPEX Altimetry, J. Geophys. topex-www.jpl.nasa.gov /science/investigators-bibliography.html   (172 words)

r1494.jpl The same Kelvin wave pulse that was seen in the TOPEX/Poseidon data was predicted by the global ocean numerical models developed on supercomputers at the Naval Research Laboratory. Contact: Mary A. Hardin FOR IMMEDIATE RELEASE February 26, 1993 JPL Press Release #1494 Scientists studying data from the TOPEX/Poseidon satellite have observed an ocean phenomenon in the equatorial Pacific that indicates a new El Nino event may occur in late February or early March off the western coast of South America. The scientists have been analyzing a prominent Kelvin wave which has appeared in recent TOPEX/Poseidon altimeter data. science.ksc.nasa.gov /shuttle/missions/status/r1494.jpl   (172 words)

Selected Earth System Science Education Network Resources Earth Data & Imagery http://xtreme.gsfc.nasa.gov AVHRR Land Pathfinder http://192.134.216.41 AVISO TOPEX/Poseidon data http://podaac-www.jpl.nasa.gov/topex JPL TOPEX/POSEIDON Images http://southport.jpl.nasa.gov NASA/JPL Imaging Radar Homepage http://podaac-www.jpl.nasa.gov/sst/ Oceans SST Pathfinder (NOAA/NASA) http://www.jpl.nasa.gov/sircxsar/ SIR-C/XSAR images http://www.mth.uea.ac.uk/ocean/oceanography.html The World-Wide Web Library: Oceanography The Earth System Science Education Program Collection of Resources *** http://www.usra.edu/esse *** USRA Earth System Science Education Server *** http://www.usra.edu/esse/esseschools.html *** Earth System Science Education Member Universities *** http://www.hq.nasa.gov/office/mtpe *** NASA's Office of Mission to Planet Earth All links active as of 11/10/95 except for those marked "-" as unable to verify during update. Please direct corrections, suggestions or comments to Martin Ruzek at ruzek@usra.edu. www.usra.edu /esse/essersrc.html   (720 words)

North Pacific Swell Models North Pacific region scanned by the TOPEX satellite indicating the measured deviation of the sea surface from the average height or mean at that point after removing tides. North Pacific region scanned by the TOPEX satellite indicating which data points have been determined to contain valid oceanographic data. North Pacific region scanned by the TOPEX satellite indicating the windspeed. www.omaui.com /NorthPacificSwellModels.php   (720 words)

Ocean Surface Topography from Space-Education-Education Resources for Oceanography and Earth Sciences Teaching the Physics and Math of Oceanography with Scientific Data (TOPEX) Teaching the Physics and Math of Oceanography with Scientific Data (TOPEX) (new 11/25/98) Teaching the Physics and Math of Oceanography with Scientific Data (TOPEX) (11-12) sealevel.jpl.nasa.gov /education/edudoc.html   (7952 words)

Weather-changing ocean waves charted from space Scientists use the TOPEX/Poseidon data to produce global maps of ocean topography, which then can be used to identify Rossby waves. "Thanks to TOPEX/Poseidon, for the first time we can see these waves very clearly, and this research shows that they become more intense to the west of the great mountain chains on the ocean floor, and more fundamentally, that they travel much faster than the accepted theory predicts," Zlotnicki said. Dudley Chelton, a TOPEX/Poseidon science team member at the College of Oceanic and Atmospheric Sciences at Oregon State University in Corvallis. www.jpl.nasa.gov /releases/96/tprossby.html   (585 words)

Bibliography On TOPEX/POSEIDON It provides: a point of contact between users, experts and providers for satellite altimetry missions such as TOPEX/POSEIDON, information on the available altimeter data. Hughes, C. Rossby Waves in the Southern Ocean: A Comparison of TOPEX/POSEIDON Altimetry with Model Predictions : Journal of Geophysical Research, Vol. Chassignet, EP; Holland, WR; Capotondi, A : Impact of the altimeter orbit on the reproduction of oceanic rings: Application to a regional model of the Gulf Stream : Satellite Altimetry For Oceanography From Data Processing To Data Assimilation.#Journees Altimetrie Satellitaire Pour L'oceanographie (Jaso), 1992, Pp. www.coaps.fsu.edu /lib/topex.html   (585 words)

Global mean sea level calibration For the tide gauge calibrations, global mean sea level during the period of TOPEX-A operation is used as zero level for TOPEX-B, POSEIDON, and Jason. A number of gauges, however, have a significant lag in reporting of records and are not available for the Jason calibration. We have restricted the ~100 available gauges to a set of 64 near real-time stations that span the majority of both the T/P and Jason missions, and will therefore provide a relatively consistent calibration for both. sealevel.colorado.edu /calibration.html   (326 words)

Sample DIF End_Group Group: Summary The TOPEX/POSEIDON MGDR-B (Merged Geophysical Data Record-B) dataset contains altimeter and microwave radiometer data from the TOPEX/POSEIDON mission, a joint endeavour of NASA and the French space agency CNES (Centre National d' Etudes Spatiales). This data set (MGDR-B) has generation B algorithms, and replaces the generation A dataset identified as JPL PO.DAAC Product 028. End_Group IDN_Node: USA/NASA Originating_Metadata_Node: GCMD Metadata_Name: CEOS IDN DIF Metadata_Version: Version 9.4.0 Last_DIF_Revision_Date: 2005-01-17 Group: DIF_Revision_History 2000-09-06, S. Ritz updated broken summary URL after contacting V. End_Group gcmd.gsfc.nasa.gov /User/difguide/sample_dif.html   (326 words)

Dr. George Born NASA Public Service Group Achievement Award, TOPEX/Poseidon Precision Orbit Determination, 1994 NASA Group Achievement Award, TOPEX/Poseidon Verification Team, 1994 Statistical Orbit Determination, co-authored with B. Tapley and B. Schutz of The University of Texas at Austin, Academic Press, 2004. ccar.colorado.edu /~wwwadmin/ccar/people/born.htm   (1055 words)

Ocean Surface Topography from Space-Science Giese, B. Carton, and L. Holl, Sea level variability in the eastern tropical Pacific as observed by TOPEX and Tropical Ocean-Global Atmosphere Tropical Atmosphere-Ocean Experiment, Journal of Geophysical Research, 99 (C12): 24,739-24,748, Dec. 15, 1994. Melbourne, W. Davis, B. Tapley, T. Yunck, The GPS Flight Experiment on TOPEX/Poseidon, Geophysical Research Letters, 21 (19): 2,171-2,174, Sept. 15, 1994. Displacements of an oceanic zone of convergence on the eastern edge of the Pacific Warm Pool: consequences for ENSO and bio-geochemical phenomena. sealevel.jpl.nasa.gov /science/investigators-bibliography.html   (1055 words)

AVISO Altimetry - Cycle 322 The scatter diagram for the TOPEX ionospheric correction and the DORIS ionospheric correction shows the good compatibility between the two corrections. Analyzing the difference (TOPEX - DORIS) for cycle 322 gives : Cycle 322 started on 01/06/11 at 01:44:33 and ended on 01/06/20 at 23:43:03. www-aviso.cnes.fr /HTML/information/missions/topex/status/status_322_uk.html   (490 words)

Satellites Record Weakening North Atlantic Current Hakkinen and Rhines were able to reference earlier data to TOPEX/Poseidon data, and translate the satellite sea-surface height data to velocities of the subpolar gyre. Sea-surface height satellite data came from NASA's Seasat (July, August 1978), U.S. Navy's Geosat (1985 to 1988), and the European Space Agency's European Remote Sensing Satellite1/2 and NASA's TOPEX/Poseidon (1992 to present). Whether the trend is part of a natural cycle or the result of other factors related to global warming is unknown. www.spacedaily.com /news/arctic-04a.html   (1009 words)

Ocean Sciences/WFF WFF scientists support the Ocean Science Branch through our involvement with radar altimetry (TOPEX/Poseidon, Jason and GFO), ocean color research, ocean biology, air-sea interaction and wave tank research. The Ocean Topography Experiment (TOPEX/Poseidon) is an advanced satellite radar altimetry system which provides global sea level measurements with an unprecedented accuracy. Please bear with us as we strive to rework our website to accurately reflect the outcome of this transformation process. ocean.wff.nasa.gov   (477 words)

Barotropic Model - Along-Topex-Track Ali, A.H., V. Zlotnicki, N. Hirose, I. Fukumori, and R. Ponte: Effect of different Wind Forcings on a barotropic ocean model's ability to fit Topex and BPR data. Ponte, R. and P. Gaspar, Regional analysis of the inverted barometer effect over the global ocean using TOPEX/POSEIDON data and model results, J. Geophys. Because the model was forced with NCEP wind and pressure, this IB is not the same as the field 'IB', from ECWMF. oceanesip.jpl.nasa.gov /BTmodel   (477 words)

Special offer for UMTS FCT (USIM) from To : Forums Topex UMTS FCT with USIM’s is a revenue generator for small offices and home offices working on all 3G networks. Fore more information please visit our web site: www.topex.ro Is Special offer for UMTS FCT (USIM) from To spam? voip-forum.tmcnet.com /voip-forum/forum/forum_posts.asp?TID=4588   (203 words)

Improving Geoid Undulations and Ocean Dynamic Topography Through Altimetry and a Modified Kalman Filter Evaluation of this global dynamic topography data in the localized area of the Gulf Stream showed a consistent disagreement with the TOPEX/geoid implied dynamic topography. An investigation of these systematic discrepencies concluded that the magnitude of these local feature differences from the TOPEX/geoid values necessitated replacing the dynamic topography model with a synthetic model before proceeding with the modified Kalman Filter. Approximations to the transition matrix of the dynamic topography required that a stabilization of the Kalman filter be developed to prevent divergence. www.ngs.noaa.gov /PUBS_LIB/geoid_undulation.html   (203 words)

AVISO Altimétrie - Cycle 247 Analyzing the difference (TOPEX - DORIS) for cycle 247 gives : The scatter diagram for the TOPEX ionospheric correction and the DORIS ionospheric correction shows the good compatibility between the two corrections. Cycle 247 started on 99/05/29 at 09:35:16 and ended on 99/06/08 at 07:33:46. www-aviso.cnes.fr /HTML/information/missions/topex/status/status_247_uk.html   (506 words)

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