TOWARDS THE TIME-VARIABLE GRAVITY FIELD FROM CHAMP M. Weigelt, A. Jäggi, L. Prange, W. Keller, N. Sneeuw TexPoint fonts used in EMF. Read the TexPoint.

Slides:

Advertisements

Similar presentations

Nonmyopic Active Learning of Gaussian Processes An Exploration – Exploitation Approach Andreas Krause, Carlos Guestrin Carnegie Mellon University TexPoint.

Advertisements

Anomaly Detection in Problematic GPS Time Series Data and Modeling Dafna Avraham, Yehuda Bock Institute of Geophysics and Planetary Physics, Scripps Institution.

Comparison of full-repeat and sub-cycle solutions in gravity recovery simulations of a GRACE-like mission Siavash Iran Pour, Nico Sneeuw, Matthias Weigelt,

Draggable Cat CS 5010 Program Design Paradigms “Bootcamp” Lesson 3.3 TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.:

Regression “A new perspective on freedom” TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: AAA A A A A AAA A A.

ILRS Workshop, 2008, A 33 Year Time History of the J2 Changes from SLR Minkang Cheng and Byron D. Tapley Center for Space Research.

Clima en España: Pasado, presente y futuro Madrid, Spain, 11 – 13 February 1 IMEDEA (UIB - CSIC), Mallorca, SPAIN. 2 National Oceanography Centre, Southampton,

GRACE GRAVITY FIELD SOLUTIONS USING THE DIFFERENTIAL GRAVIMETRY APPROACH M. Weigelt, W. Keller.

Collaboration FST-ULCO 1. Context and objective of the work  Water level : ECEF Localization of the water surface in order to get a referenced water.

DFG-Research Unit “Earth rotation and Global Dynamic processes” Poznan, 13 – 17 October 2008 N. Panafidina, M. Rothacher, D. Thaller Comparison and Combination.

Long wavelength gravity field determination from GOCE using the acceleration approach M. Weigelt 1, O. Baur 2, T. Reubelt 1, N. Sneeuw 1, M. Roth 1 (1)

“Real-time” Transient Detection Algorithms Dr. Kang Hyeun Ji, Thomas Herring MIT.

Logistic Regression Principal Component Analysis Sampling TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: AAAA A A A.

The Four Candidate Earth Explorer Core Missions Consultative Workshop October 1999, Granada, Spain, Revised by CCT GOCE S 59 Performance.

Nonmyopic Active Learning of Gaussian Processes An Exploration – Exploitation Approach Andreas Krause, Carlos Guestrin Carnegie Mellon University TexPoint.

Jason Dekdebrun Theoretical Physics Institute, UvA Advised by Kostas Skenderis TexPoint fonts used in EMF. Read the TexPoint manual before you delete this.

TEMPLATE DESIGN © The computation of the confidence over K multiple scans is computed as if all scene points came from.

On Rearrangements of Fourier Series Mark Lewko TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A AAA A AAA A A A A.

Use of G99SSS to evaluate the static gravity geopotential derived from the GRACE, CHAMP, and GOCE missions Daniel R. Roman and Dru A. Smith Session: GP52A-02Decade.

WE WA VI ST PE MO MB MC CO BH MC MB MO PE ST VI WA Comparison of GRACE gravity field solutions, hydrological models and time series of superconducting.

M23- Residuals & Minitab 1  Department of ISM, University of Alabama, ResidualsResiduals A continuation of regression analysis.

Assessment of Basin-scale Terrestrial Water Storage Variations from Reprocessed GRACE Gravity Fields for Climate Model Validation L. Zhang, H. Dobslaw,

ESA Living Planet Symposium, Bergen, T. Gruber, C. Ackermann, T. Fecher, M. Heinze Institut für Astronomische und Physikalische Geodäsie (IAPG)

1 Learning CRFs with Hierarchical Features: An Application to Go Scott Sanner Thore Graepel Ralf Herbrich Tom Minka TexPoint fonts used in EMF. Read the.

1 Approximate decorrelation and non-isotropic smoothing of time-variable GRACE gravity field models Jürgen Kusche, Roland Schmidt with input from Susanna.

Titelmaster Geometrical and Kinematical Precise Orbit Determination of GOCE Akbar Shabanloui Institute of Geodesy and Geoinformation, University of Bonn.

Hydrological mass changes inferred from high-low satellite- to-satellite tracking data Tonie van Dam, Matthias Weigelt Mohammad J. Tourian Nico Sneeuw.

IGS Analysis Center Workshop, 2-6 June 2008, Florida, USA GPS in the ITRF Combination D. Angermann, H. Drewes, M. Krügel, B. Meisel Deutsches Geodätisches.

Coseismic and Postseismic Deformation from the Sumatra-Andaman Earthquake Observed by GRACE Joint International GSTM and DFG SPP Symposium, October 15-17,

A Force Caused by Gravity.  If we apply Newton’s 2 nd Law to objects accelerating due to gravity F G = mg  F G – force of gravity, commonly called.

The Chain Rule Rule for finding the derivative of a composition of two functions. If y is a function of u and u is a function of x, then y is a function.

Towards improved GRACE de-aliasing - first results from dynamical and residual ocean tide analysis Wolfgang Bosch 1), Detlef Stammer 2), Frank Flechtner.

1 Average time-variable gravity from GPS orbits of recent geodetic satellites VIII Hotine-Marussi Symposium, Rome, Italy, 17–21 June 2013 Aleš Bezděk 1.

1 Geoid and Geoid Change: Discussion Topics Roger Haagmans, Boulder, 21October 2009.

Alaskan Mountain Glacial Melting Observed by GRACE 2006 WPGM, July , Beijing, China G32A-02 Wed. 11:05 AM J.L. Chen 1, B.D. Tapley 1, C.R. Wilson.

Water storage variations from time-variable gravity data Andreas Güntner Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences Section.

AGU Fall meeting Quality assessment of GPS reprocessed Terrestrial Reference Frame 1 IGN/LAREG and GRGS 2 University of Luxembourg X Collilieux.

Multifactor GPs Suppose now we wish to model different mappings for different styles. We will add a latent style vector s along with x, and define the.

Area estimation in the MARS project. A summary history J. Gallego,– MARS AGRI4CAST.

Geocenter Variations Derived from GRACE Data Z. Kang, B. Tapley, J. Chen, J. Ries, S. Bettadpur Joint International GSTM and SPP Symposium GFZ Potsdam,

The Road to RL05 Srinivas Bettadpur for the UTCSR GRACE Team.

1 1 Slide Simple Linear Regression Estimation and Residuals Chapter 14 BA 303 – Spring 2011.

Model Selection and Validation. Model-Building Process 1. Data collection and preparation 2. Reduction of explanatory or predictor variables (for exploratory.

Do Annual Geopotential Variations Affect IGS Products ? J. Ray NOAA/NGS with major help from S. Bettadpur, J. Ries U. Texas/CSR T.-S. Bae Sejong U. X.

OSTST Meeting, Hobart, Australia, March 12-15, 2007 EIGEN-5 activities in GFZ and GRGS R. Biancale, J.-M. Lemoine, S. Bruinsma, S. Loyer* CNES/GRGS Toulouse,

GRACE Science Team Meeting October 15-17, 2007 Potsdam Germany Alternative Gravity Field Representations: Solutions, Characteristics, and Issues Michael.

EUM/OPS/VWG/11 Issue /06/2011 Yoke Yoon Yago Andres Christian Marquardt COSMIC GPS Data Processing Slide: 1.

Psychology 202a Advanced Psychological Statistics October 22, 2015.

On sets of large doubling, ¤ (4) sets, and error-correcting codes Allison LewkoMark Lewko Columbia University Institute for Advanced Study TexPoint fonts.

5/18/2994G21D-04 Spring AGU Realization of a Stable North America Reference Frame Thomas Herring Department of Earth Atmospheric and Planetary, Sciences,

C H A M P International Laser Ranging Service - General Assembly, October 2005 Eastbourne, UK L. Grunwaldt, R. Schmidt, D. König, R. König, F.-H. Massmann.

Vermelding onderdeel organisatie A 3-year series of Earth’s gravity field derived from GRACE range measurements Xianglin Liu, Pavel Ditmar, Qile Zhao,

Ingo Sasgen 1, Henryk Dobslaw 1, Zdenek Martinec 2, and Maik Thomas 1 (1) GeoForschungsZentrum Potsdam, Department 1: Geodesy and Remote Sensing Section.

Mayer-Gürr et al.ESA Living Planet, Bergen Torsten Mayer-Gürr, Annette Eicker, Judith Schall Institute of Geodesy and Geoinformation University.

OSTST Meeting, Hobart, Australia, March 12-15, 2007 On the use of temporal gravity field models derived from GRACE for altimeter satellite orbit determination.

IGARSS 2011, Vancuver, Canada July 28, of 14 Chalmers University of Technology Monitoring Long Term Variability in the Atmospheric Water Vapor Content.

1/16 35th IGS Governing Board Meeting December 13, 2009 – San Francisco TRANSITION OF THE IGS REFERENCE FRAME COORDINATION FROM NRCAN TO IGN - STATUS AND.

Sequential Off-line Learning with Knowledge Gradients Peter Frazier Warren Powell Savas Dayanik Department of Operations Research and Financial Engineering.

Jason-1 POD reprocessing at CNES Current status and further developments L. Cerri, S. Houry, P. Perrachon, F. Mercier. J.P. Berthias with entries from.

Astronomical Institute University of Bern Astronomical Institute, University of Bern Swarm Gravity Field Results with the CMA Adrian Jäggi, Daniel Arnold,

Investigations on (radial) offsets between different Swarm orbit solutions 8 September th Swarm Data Quality Workshop, IPGP, Paris Heike Peter (PosiTim),

ESA Living Planet Symposium, 29 June 2010, Bergen (Norway) GOCE data analysis: the space-wise approach and the space-wise approach and the first space-wise.

Lecture 3: System Representation

Astronomical Institute University of Bern 1 Astronomical Institute, University of Bern, Switzerland * now at PosiTim, Germany 5th International GOCE User.

SC4MGV – ESA Contract No /13/NL/MV 5th International GOCE User Workshop November 2014, Paris, France ESA SC4MGV Search strategy for.

Motivational Examples Three Types of Unusual Observations

Contrasts & Statistical Inference

TexPoint fonts used in EMF.

Daniel Rieser, Christian Pock, Torsten Mayer-Guerr

Contrasts & Statistical Inference

Presentation transcript:

TOWARDS THE TIME-VARIABLE GRAVITY FIELD FROM CHAMP M. Weigelt, A. Jäggi, L. Prange, W. Keller, N. Sneeuw TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A AAA

Questions Did we get everything out of the CHAMP data? Is the time variable gravity field really out of reach? What do we learn for future satellite missions? 2

Previous studies & limitations based on the energy balance approach two years of GPS-data with 30 s sampling no dealiasing products no covariance information 3 Degree RMS w.r.t. ITG-GRACE2010s

Processing refinements

Refinements 5 Acceleration approach: three times the number of observations three dimensional observations Improved GPS positioning: 10 s sampling estimated absolute antenna phase center model new IGS standards … Prange 2010

Outliers vs. poor observations 6 Typically threshold based outlier detection based on residuals: ? ? ? ? Localizing outlier detection necessary Consider (synthetical) covariance information

Results using outlier detection 7

CHAMP vs. GRACE monthly solutions 8

Monthly solutions

Pushing the limits – combination strategies 10 Standard case: single month solution Combining n-month with unit weight Combining n-month with Bartlett weight + Grace A and Grace B

Comparison of combination strategies 11

CHAMP-only solution with Bartlett option 12

Adding GRACE … 13

Results for CHAMP + GRACE 14

Time series of coefficients 15 C 40 C 44 Correlation Single coefficients comparison capability GRACE – GFZ Rl. 4 CHAMP + GRACE

Spatial pattern 16 October 2003: February 2004:

Conclusion Did we get everything out of the data of CHAMP? CHAMP still offers a wealth of information Is the time variable gravity field really out of reach? No, but processing needs further improvements What do we learn for future satellite missions? “Real” covariance information needed Increase the number of observations 17

TOWARDS THE TIME-VARIABLE GRAVITY FIELD FROM CHAMP M. Weigelt, A. Jäggi, L. Prange, W. Keller, N. Sneeuw TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A AAA THANK YOU

Appendix

Time variable signal? 20 GRACE – GFZ Rl. 4 CHAMP + GRACE