Presentation is loading. Please wait.

Presentation is loading. Please wait.

Progress in Geoid Modeling from Satellite Missions

Published byCharity Boone Modified over 8 years ago

Similar presentations

Presentation on theme: "Progress in Geoid Modeling from Satellite Missions"— Presentation transcript:

1 Progress in Geoid Modeling from Satellite Missions
John Ries Center for Space Research The University of Texas at Austin 2009 Workshop on Monitoring North American Geoid Change Boulder, Colorado 21-23 October 2009

2 GRACE Mission Status Mission Highlights
Geoid models Mean fields: GGM03C, EIGEN-GL05C, ITG-GRACE03SEGM2008 Time variable fields (86 monthly solutions through August 2009) Nearly 100 % of scientific measurements for over seven years have been collected and analyzed NASA 2009 Senior Review successful Extension to 2011 approved by NASA DLR approved mission funding through 2009 Last steps being taken to assure funding past 2009 Flight Segment Generally Robust All systems in nominal operation Certain sub-systems are single-string on both s/c New thermal regimes to conserve battery life Instrument performance continues to meet mission requirements Orbit Launched: March 17, 2002 Over 7 years in orbit Initial Altitude: 500 km Current Altitude: ~460 km (-10 m/day) Inclination: 89º Eccentricity: ~0.001 Separation Distance: ~220 km Non-Repeat Ground Track, Earth Pointed, 3-Axis Stable Predicted Lifetime: 2013+

3 Progress from EGM96 more power improvement GFZ05C=EIGEN-GL05C

4 Improvement in GRACE-only Models
GGM01S-EGM96 (deg/order 120) GGM02S-EGM96 (deg/order 120) GGM03S-EGM96 (deg/order 120) mgal Scale is +/- 10 mgal

5 Progress in Gravity Determination from Space
GGM01S (111 days of GRACE data) GGM03S (4 years of GRACE data)

6 Estimated Total Geoid Error
GFZ05C=EIGEN-GL05C

7 Degree-banded GPS Leveling Test
Limiting the test to a selected degree range using a degree-banded approach (Huang et al., 2002), 1149 GPS/leveling points over Canada were compared to the GGM02C, EIGEN-GL04C, and EGM2008 geoids With EGM08, test now appears to be limited by GPS/leveling data errors, not geoid

8 Short Wavelength Marine Geoid Residuals EIGEN-GL04C
The residuals are the difference between a ‘high-frequency DOT’ defined as (GSFCMSS00 – geoid) and the same DOT smoothed to ~900 km (to degree/order 360) Might remark that much of the observed patterns appear to be substantially reduced in the upcoming EIGEN-GL05C solution Scale is +/- 25 cm ‘Blending’ space-based and terrestrial gravity information smoothly and without ‘artifacts’ has been one of the most significant challenges

9 Short Wavelength Marine Geoid Residuals EIGEN-GL05C
The residuals are the difference between a ‘high-frequency DOT’ defined as (GSFCMSS00 – geoid) and the same DOT smoothed to ~900 km (to degree/order 360) Might remark that much of the observed patterns appear to be substantially reduced in the upcoming EIGEN-GL05C solution Scale is +/- 25 cm. As GRACE component becomes more accurate and skill in blending the two pieces of information improves, ‘artifacts’ are greatly reduced

10 Short Wavelength Marine Geoid Residuals EGM2008
The residuals are the difference between a ‘high-frequency DOT’ defined as (GSFCMSS00 – geoid) and the same DOT smoothed to ~900 km (to degree/order 360) Scale is +/- 25 cm. EGM2008 is relatively free of ‘artifacts’ while also providing the most accurate and highest resolution marine geoid model (degree/order 2159+)

11 Secular Gravity Changes (1)
Difference between two 2-year means ( and ) divide by 2 to get mgal/year Arctic and North America Antarctic microgal

12 Secular Gravity Changes (2)
Difference between two 2-year means ( and ) divide by 2 to get mgal/year Europe Asia microgal

13 Secular Gravity Changes (3)
Long-term geoid change due to ∆J2 ~ 0.2 mm/yr

14 Seasonal Geoid Variations
1 mm geoid ≈ 2 cm water Mass variations are observed in Amazon basin with ~400 km resolution A clear separation can be observed between the large Amazon watershed and the smaller watersheds to the north (e.g., the Orinoco watershed), indicating that basin-scale variability is resolved.

15 Gravity field and steady-state Ocean Circulation Explorer (GOCE)
Launched March 2009 Drag-free mode May 2009 Allows operation at ~270 km Measurement mode September 2009 Mission lifetime ~18 months

16 Impact of GOCE on Geoid Accuracy
Combining GOCE with GRACE is expected to extend geoid resolution from space by a factor of 2 or more Note that the long wavelength geoid information (including temporal variability) must be provided by GRACE-type missions

17 In The Near Future Continue routine operations and delivery of good quality data and products RL05, Quick-Look fields, and other exciting developments… Extension of Memorandum of Understanding between NASA and DLR on extended GRACE mission operations Closely monitor data and products for any signs of aging or environmentally related degradation in quality GRACE Science Team Meeting: Nov 5-6, in Austin, TX (USA) Registration is now open Looking forward to the contribution of GOCE to geoid accuracy

Download ppt "Progress in Geoid Modeling from Satellite Missions"

Similar presentations

NADIR workshop - October 25-26, 2011page 1 / 16 Density and Winds Inferred from GOCE Accelerometer (thrusters) Data Sean Bruinsma CNES, Toulouse Eelco.

NADIR workshop - October 25-26, 2011page 1 / 16 Density and Winds Inferred from GOCE Accelerometer (thrusters) Data Sean Bruinsma CNES, Toulouse Eelco.
ILRS Workshop, 2008, A 33 Year Time History of the J2 Changes from SLR Minkang Cheng and Byron D. Tapley Center for Space Research.

ILRS Workshop, 2008, A 33 Year Time History of the J2 Changes from SLR Minkang Cheng and Byron D. Tapley Center for Space Research.
From TOPEX-POSEIDON to JASON Science Working Team Meeting GRACE Mission Status Arles, France November 18-21, 2003 Byron D. Tapley (Principal Investigator)

From TOPEX-POSEIDON to JASON Science Working Team Meeting GRACE Mission Status Arles, France November 18-21, 2003 Byron D. Tapley (Principal Investigator)
Effect of Surface Loading on Regional Reference Frame Realization Hans-Peter Plag Nevada Bureau of Mines and Geology and Seismological Laboratory University.

Effect of Surface Loading on Regional Reference Frame Realization Hans-Peter Plag Nevada Bureau of Mines and Geology and Seismological Laboratory University.
The ICESat-2 Mission: Laser altimetry of ice, clouds and land elevation T. Markus, T. Neumann NASA Goddard Space Flight Center W. Abdalati Earth Science.

The ICESat-2 Mission: Laser altimetry of ice, clouds and land elevation T. Markus, T. Neumann NASA Goddard Space Flight Center W. Abdalati Earth Science.
MR3522 - P.Durkee 5/20/2015 MR3522Winter 1999 MR3522 - Remote Sensing of the Atmosphere and Ocean - Winter 1999 Active Microwave Radar.

MR P.Durkee 5/20/2015 MR3522Winter 1999 MR Remote Sensing of the Atmosphere and Ocean - Winter 1999 Active Microwave Radar.
2-3 November 2009NASA Sea Level Workshop1 The Terrestrial Reference Frame and its Impact on Sea Level Change Studies GPS VLBI John Ries Center for Space.

2-3 November 2009NASA Sea Level Workshop1 The Terrestrial Reference Frame and its Impact on Sea Level Change Studies GPS VLBI John Ries Center for Space.
The Four Candidate Earth Explorer Core Missions Consultative Workshop 12-14 October 1999, Granada, Spain, Revised 2006-01-05 by CCT GOCE S 43 Science and.

The Four Candidate Earth Explorer Core Missions Consultative Workshop October 1999, Granada, Spain, Revised by CCT GOCE S 43 Science and.
This study is a part of the activity in the frameworks of ISTC 2975 project “New methods of interpretation of new satellite data on the Earth gravity field.

This study is a part of the activity in the frameworks of ISTC 2975 project “New methods of interpretation of new satellite data on the Earth gravity field.
Summary: Scientific Achievement, Applications and Future Requirements Zueheir Altamimi Steve Klosko Richard Gross Aleksander Brzezinski.

Summary: Scientific Achievement, Applications and Future Requirements Zueheir Altamimi Steve Klosko Richard Gross Aleksander Brzezinski.
The Four Candidate Earth Explorer Core Missions Consultative Workshop 12-14 October 1999, Granada, Spain, Revised 2006-01-05 by CCT GOCE S 59 Performance.

The Four Candidate Earth Explorer Core Missions Consultative Workshop October 1999, Granada, Spain, Revised by CCT GOCE S 59 Performance.
16 th International Workshop on Laser RangingPoznan, Poland13-17 October 2008 Confirming the Frame-Dragging Effect with Satellite Laser Ranging John C.

16 th International Workshop on Laser RangingPoznan, Poland13-17 October 2008 Confirming the Frame-Dragging Effect with Satellite Laser Ranging John C.
The Four Candidate Earth Explorer Core Missions consultative Workshop 12-14 October 1999, Granada, Spain, Revised 2006-01-05 by CCT GOCE S 23 The gravity.

The Four Candidate Earth Explorer Core Missions consultative Workshop October 1999, Granada, Spain, Revised by CCT GOCE S 23 The gravity.
RESEARCH POSTER PRESENTATION DESIGN © 2012 www.PosterPresentations.com This research is based on the estimation of the spherical harmonic geopotential.

RESEARCH POSTER PRESENTATION DESIGN © This research is based on the estimation of the spherical harmonic geopotential.
The Four Candidate Earth Explorer Core Missions Consultative Workshop 12-14 October 1999, Granada, Spain, Revised 2006-01-05 by CCT GOCE S 1 Gravity Field.

The Four Candidate Earth Explorer Core Missions Consultative Workshop October 1999, Granada, Spain, Revised by CCT GOCE S 1 Gravity Field.
Monitoring the Global Sea Level Rise Budget with Jason, Argo and GRACE Observations Eric Leuliette and Laury Miller NOAA/Laboratory for Satellite Altimetry.

Monitoring the Global Sea Level Rise Budget with Jason, Argo and GRACE Observations Eric Leuliette and Laury Miller NOAA/Laboratory for Satellite Altimetry.
Status GRACE Mission Operations 1 GSTM – Potsdam - 15 October 2007 Status GRACE Mission Operations Joseph G. Beerer, JPL Operations Mission Manager Franz-Heinrich.

Status GRACE Mission Operations 1 GSTM – Potsdam - 15 October 2007 Status GRACE Mission Operations Joseph G. Beerer, JPL Operations Mission Manager Franz-Heinrich.
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.

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.
Don P. Chambers Center for Space Research The University of Texas at Austin Understanding Sea-Level Rise and Variability 6-9 June, 2006 Paris, France The.

Don P. Chambers Center for Space Research The University of Texas at Austin Understanding Sea-Level Rise and Variability 6-9 June, 2006 Paris, France The.
J. Famiglietti 1, T. Syed 1, P. Yeh 1,2 and M. Rodell 3 1 Dept. of Earth System Science, University of California,Irvine, USA 2 now at: Institute of Industrial.

J. Famiglietti 1, T. Syed 1, P. Yeh 1,2 and M. Rodell 3 1 Dept. of Earth System Science, University of California,Irvine, USA 2 now at: Institute of Industrial.

Similar presentations

Ads by Google