Professor Shin-Chan Han

Professor Shin-Chan Han

Professor

School of Engineering

Career Summary

Biography

Shin-Chan Han was born and grew up in South Korea.  Han was educated originally in the field of Earth Science at the Seoul National University, South Korea.  In 1998, Han started postgraduate work in the discipline of Geodetic Science and Surveying at the Ohio State University, the United States.  After finishing PhD in 2003, Han stayed at the Ohio State University for three years as a postdoc and research scientist.  In 2006, Han accepted a position at NASA Goddard Space Flight Center to join Space Geodesy group. 

Shin-Chan Han's research focus is on the analysis of space geodetic measurements and theoretical modeling of geophysical processes that govern mass distribution and transport within the Earth and the terrestrial planets. Han started out using GPS and other satellite ranging measurements to analyze spacecraft orbits as well as surface deformation and gravity fields of the Earth and recently those of the Moon and Mars.  Han endeavored to exploit space geodetic measurements to tackle various geophysical problems, ranging from solid Earth, to terrestrial and atmospheric water, to ice mass and ocean, to ocean tides and bathymetry, to ionosphere, and to the gravity and topography of the Moon and Mars. 

Han have demonstrated ability to develop cross-disciplinary research program and establish collaboration with scientists in various fields.  Han obtained a number of research grants during his tenure in US to pursue interdisciplinary research in Geodesy and Satellite Surveying for the Earth and planets.  During his tenure at NASA, total grant was over $2.4M and most of the funding was secured as Chief Investigator. 

Han is also a winner of various prestigious awards given by American Geophysical Union, by NASA Headquarter, by NASA Goddard Space Flight Center, by US Department of the Interior, by the American Congress on Surveying and Mapping, by the Institute of Navigation, by the Ohio State University, and by the South Korean government.

Since 2004, Han has been participating as a science team member for the Gravity Recovery And Climate Experiment (GRACE) satellite mission.  As a team member, Han has demonstrated applicability of satellite geodetic data to various problems in the Earth sciences: many of them being the “first-time” applications. Han has pioneered a number of geodetic techniques to process GRACE data and helped to maximize the science return from the GRACE mission. 


Qualifications

  • Doctor of Philosophy, Ohio State University - USA
  • Master of Science, Ohio State University - USA

Keywords

  • GNSS/GPS
  • Geodesy
  • Geophysics
  • Planetary Sciences

Languages

  • Korean (Mother)

Fields of Research

Code Description Percentage
090902 Geodesy 100

Professional Experience

UON Appointment

Title Organisation / Department
Professor University of Newcastle
School of Engineering
Australia

Academic appointment

Dates Title Organisation / Department
1/11/2006 - 31/12/2014 Geodesist NASA Goddard Space Flight Center
Solar Systen Exploration
United States
1/01/2004 - 30/10/2006 Research Scientist Ohio State University
Geodetic Science and Surveying
United States
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Chapter (9 outputs)

Year Citation Altmetrics Link
2016 Li X, Lemoine FG, Paik HJ, Zagarola M, Shirron PJ, Griggs CE, et al., 'Design of Superconducting Gravity Gradiometer Cryogenic System for Mars Mission', Cryocoolers 19, International Cryocooler Conference, Inc., Boulder, CO, USA 585-594 (2016) [B1]
Co-authors Shin-Chan Han
2011 Song YT, Han S-C, 'Satellite Observations Defying the Long-Held Tsunami Genesis Theory', , SPRINGER-VERLAG BERLIN 327-342 (2011)
DOI 10.1007/978-3-642-16541-2_17
Citations Web of Science - 6
Co-authors Shin-Chan Han
2005 Han SC, Shum CK, Jekeli C, Braun A, Chen YQ, Kuo CY, 'CHAMP gravity field solutions and geophysical constraint studies', , SPRINGER-VERLAG BERLIN 108-114 (2005)
DOI 10.1007/3-540-26800-6_17
Citations Scopus - 2
Co-authors Shin-Chan Han
2005 Potts LV, Shum CK, von Frese R, Han SC, Mautz R, 'Recovery of isostatic topography over North America from topographic and CHAMP gravity correlations', , SPRINGER-VERLAG BERLIN 193-198 (2005)
DOI 10.1007/3-540-26800-6_31
Co-authors Shin-Chan Han
2005 Mautz R, Schaffrin B, Shum CK, Han SC, 'Regional geoid undulations from CHAMP, represented by locally supported basis functions', , SPRINGER-VERLAG BERLIN 230-236 (2005)
DOI 10.1007/3-540-26800-6_37
Citations Scopus - 1
Co-authors Shin-Chan Han
2005 Schmidt M, Kusche J, van Loon JP, Shum CK, Han SC, Fabert O, 'Multiresolution representation of a regional geoid from satellite and terrestrial gravity data', 167-172 (2005)

In this paper we present results from modeling the Earth's gravitational field over the northern part of South-America using spherical wavelets. We have applied our analysis ... [more]

In this paper we present results from modeling the Earth's gravitational field over the northern part of South-America using spherical wavelets. We have applied our analysis to potential data that we derived from CHAMP using the energy balance method, and to terrestrial gravity anomalies. Our approach provides a regional correction to the EGM96 reference gravity field, expressed in various detail levels, which are partly determined by the satellite data and partly by the terrestrial data.

Citations Scopus - 12
Co-authors Shin-Chan Han
2003 von Frese RRB, Potts LV, Kim HR, Shum CK, Taylor PT, Kimi JW, Han SC, 'CHAMP gravity anomalies over Antarctica', , SPRINGER-VERLAG BERLIN 180-186 (2003)
Co-authors Shin-Chan Han
2002 Han SC, Jekeli C, Shum CK, 'Aliasing and polar gap effects on geopotential coefficient estimation: Space-wise simulation study of GOCE and GRACE', , SPRINGER-VERLAG BERLIN 181-186 (2002)
Citations Web of Science - 5
Co-authors Shin-Chan Han
2000 Kwon JH, Jekeli C, Han SC, 'Absolute kinematic GPS positioning using satellite clock estimation every 1 second', , SPRINGER-VERLAG BERLIN 343-348 (2000)
Citations Web of Science - 1
Co-authors Shin-Chan Han
Show 6 more chapters

Journal article (49 outputs)

Year Citation Altmetrics Link
2017 Han S-C, 'Elastic deformation of the Australian continent induced by seasonal water cycles and the 2010-2011 La Nina determined using GPS and GRACE', GEOPHYSICAL RESEARCH LETTERS, 44 2763-2772 (2017) [C1]
DOI 10.1002/2017GL072999
Citations Scopus - 1Web of Science - 1
Co-authors Shin-Chan Han
2017 Gristey JJ, Chiu JC, Gurney RJ, Han S-C, Morcrette CJ, 'Determination of global Earth outgoing radiation at high temporal resolution using a theoretical constellation of satellites', JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 122 1114-1131 (2017) [C1]
DOI 10.1002/2016JD025514
Co-authors Shin-Chan Han
2017 Han SC, Razeghi SM, 'GPS Recovery of Daily Hydrologic and Atmospheric Mass Variation: A Methodology and Results From the Australian Continent', Journal of Geophysical Research: Solid Earth, (2017)

©2017. American Geophysical Union. We present a methodology to invert a regional set of vertical displacement data from Global Positioning System (GPS) to determine the surface m... [more]

©2017. American Geophysical Union. We present a methodology to invert a regional set of vertical displacement data from Global Positioning System (GPS) to determine the surface mass redistribution. It is assumed that GPS deformation is a result of the Earth's elastic response to the surface mass load of hydrology, atmosphere, and/or ocean. We develop an algorithm to estimate the spectral information of displacements from "regional" GPS data through regional spherical (Slepian) basis functions and apply the load Love numbers to estimate the mass load. The same approach is applied to determine global mass changes from "global" geopotential change data of Gravity Recovery and Climate Experiment (GRACE). We rigorously examine all systematic errors caused by various truncations (spherical harmonic series and Slepian series) and the smoothing constraint applied to the GPS inversion. We demonstrate the technique by processing 16 years of daily vertical motions determined from 114 GPS stations in Australia. The GPS-inverted surface mass changes are validated against GRACE data, atmosphere and ocean models, and a land surface model. Seasonal and interannual terrestrial mass variations from GPS are in good agreement with GRACE data and the water storage models. The GPS recovery compares better with the water storage model around the smaller coastal basins than two different GRACE solutions. The submonthly mass changes from GPS provide meaningful results agreeing with atmospheric mass changes in central Australia. Finally, it is suggested to integrate GPS and GRACE data to draw a comprehensive picture of daily mass changes on different continents.

DOI 10.1002/2017JB014603
Co-authors Shin-Chan Han
2016 Han S-C, Sauber J, Pollitz F, 'Postseismic gravity change after the 2006-2007 great earthquake doublet and constraints on the asthenosphere structure in the central Kuril Islands', GEOPHYSICAL RESEARCH LETTERS, 43 3169-3177 (2016) [C1]
DOI 10.1002/2016GL068167
Citations Scopus - 3Web of Science - 3
Co-authors Shin-Chan Han
2016 Han S-C, 'Seasonal clockwise gyration and tilt of the Australian continent chasing the center of mass of the Earth's system from GPS and GRACE', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 121 7666-7680 (2016) [C1]
DOI 10.1002/2016JB013388
Citations Scopus - 1Web of Science - 1
Co-authors Shin-Chan Han
2015 Pail R, Bingham R, Braitenberg C, Dobslaw H, Eicker A, Güntner A, et al., 'Science and User Needs for Observing Global Mass Transport to Understand Global Change and to Benefit Society', Surveys in Geophysics, 36 743-772 (2015)
DOI 10.1007/s10712-015-9348-9
Co-authors Shin-Chan Han
2015 Han SC, Sauber J, Pollitz F, 'Coseismic compression/dilatation and viscoelastic uplift/subsidence following the 2012 Indian Ocean earthquakes quantified from satellite gravity observations', Geophysical Research Letters, 42 3764-3772 (2015) [C1]

©2015. American Geophysical Union. All Rights Reserved. The 2012 Indian Ocean earthquake sequence (M < inf > w < /inf > 8.6, 8.2) is a rare example of great strike-s... [more]

©2015. American Geophysical Union. All Rights Reserved. The 2012 Indian Ocean earthquake sequence (M < inf > w < /inf > 8.6, 8.2) is a rare example of great strike-slip earthquakes in an intraoceanic setting. With over a decade of Gravity Recovery and Climate Experiment (GRACE) data, we were able to measure and model the unanticipated large coseismic and postseismic gravity changes of these events. Using the approach of normal mode decomposition and spatial localization, we computed the gravity changes corresponding to five moment tensor components. Our analysis revealed that the gravity changes are produced predominantly by coseismic compression and dilatation within the oceanic crust and upper mantle and by postseismic vertical motion. Our results suggest that the postseismic positive gravity and the postseismic uplift measured with GPS within the coseismic compressional quadrant are best fit by ongoing uplift associated with viscoelastic mantle relaxation. Our study demonstrates that the GRACE data are suitable for analyzing strike-slip earthquakes as small as M < inf > w < /inf > 8.2 with the noise characteristics of this region.

DOI 10.1002/2015GL063819
Citations Scopus - 7Web of Science - 7
Co-authors Shin-Chan Han
2014 Han S-C, Schmerr N, Neumann G, Holmes S, 'Global characteristics of porosity and density stratification within the lunar crust from GRAIL gravity and Lunar Orbiter Laser Altimeter topography data', GEOPHYSICAL RESEARCH LETTERS, 41 1882-1889 (2014) [C1]
DOI 10.1002/2014GL059378
Citations Scopus - 11Web of Science - 11
Co-authors Shin-Chan Han
2014 Han S-C, Sauber J, Pollitz F, 'Broadscale postseismic gravity change following the 2011 Tohoku-Oki earthquake and implication for deformation by viscoelastic relaxation and afterslip', GEOPHYSICAL RESEARCH LETTERS, 41 5797-5805 (2014) [C1]
DOI 10.1002/2014GL060905
Citations Scopus - 16Web of Science - 13
Co-authors Shin-Chan Han
2013 Han S-C, Riva R, Sauber J, Okal E, 'Source parameter inversion for recent great earthquakes from a decade-long observation of global gravity fields', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 118 1240-1267 (2013)
DOI 10.1002/jgrb.50116
Citations Scopus - 40Web of Science - 38
Co-authors Shin-Chan Han
2013 Pokhrel YN, Fan Y, Miguez-Macho G, Yeh PJ-F, Han S-C, 'The role of groundwater in the Amazon water cycle: 3. Influence on terrestrial water storage computations and comparison with GRACE', JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 118 3233-3244 (2013)
DOI 10.1002/jgrd.50335
Citations Scopus - 25Web of Science - 26
Co-authors Shin-Chan Han
2013 Han S-C, 'Determination and localized analysis of intersatellite line of sight gravity difference: Results from the GRAIL primary mission', JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 118 2323-2337 (2013) [C1]
DOI 10.1002/2013JE004402
Citations Scopus - 4Web of Science - 4
Co-authors Shin-Chan Han
2012 Lee C-K, Seo K-W, Han S-C, Yu J, Scambos TA, 'Ice velocity mapping of Ross Ice Shelf, Antarctica by matching surface undulations measured by ICESat laser altimetry', REMOTE SENSING OF ENVIRONMENT, 124 251-258 (2012) [C1]
DOI 10.1016/j.rse.2012.05.017
Citations Scopus - 5Web of Science - 6
Co-authors Shin-Chan Han
2012 Hwang JS, Han H-C, Han S-C, Kim K-O, Kim J-H, Kang M-H, Kim CH, 'Gravity and geoid model in South Korea and its vicinity by spherical cap harmonic analysis', JOURNAL OF GEODYNAMICS, 53 27-33 (2012)
DOI 10.1016/j.jog.2011.08.001
Citations Scopus - 1Web of Science - 1
Co-authors Shin-Chan Han
2012 Lee C-K, Han S-C, Bilitza D, Seo K-W, 'Global characteristics of the correlation and time lag between solar and ionospheric parameters in the 27-day period', JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 77 219-224 (2012)
DOI 10.1016/j.jastp.2012.01.010
Citations Scopus - 3Web of Science - 2
Co-authors Shin-Chan Han
2011 Han S-C, Mazarico E, Rowlands D, Lemoine F, Goossens S, 'New analysis of Lunar Prospector radio tracking data brings the nearside gravity field of the Moon with an unprecedented resolution', ICARUS, 215 455-459 (2011)
DOI 10.1016/j.icarus.2011.07.020
Citations Scopus - 17Web of Science - 16
Co-authors Shin-Chan Han
2011 Lee C-K, Han S-C, Steinberger B, 'Influence of variable uncertainties in seismic tomography models on constraining mantle viscosity from geoid observations', PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 184 51-62 (2011) [C1]
DOI 10.1016/j.pepi.2010.10.012
Citations Scopus - 13Web of Science - 11
Co-authors Shin-Chan Han
2011 Han S-C, Sauber J, Riva R, 'Contribution of satellite gravimetry to understanding seismic source processes of the 2011 Tohoku-Oki earthquake', GEOPHYSICAL RESEARCH LETTERS, 38 (2011) [C1]
DOI 10.1029/2011GL049975
Citations Scopus - 31Web of Science - 28
Co-authors Shin-Chan Han
2011 Lee C-K, Han S-C, Bilitza D, Chung J-K, 'Validation of international reference ionosphere models using in situ measurements from GRACE K-band ranging system and CHAMP planar Langmuir probe', JOURNAL OF GEODESY, 85 921-929 (2011) [C1]
DOI 10.1007/s00190-011-0442-6
Citations Scopus - 5Web of Science - 5
Co-authors Shin-Chan Han
2011 Wiese DN, Nerem RS, Han S-C, 'Expected improvements in determining continental hydrology, ice mass variations, ocean bottom pressure signals, and earthquakes using two pairs of dedicated satellites for temporal gravity recovery', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 116 (2011) [C1]
DOI 10.1029/2011JB008375
Citations Scopus - 8Web of Science - 7
Co-authors Shin-Chan Han
2010 Alsdorf D, Han S-C, Bates P, Melack J, 'Seasonal water storage on the Amazon floodplain measured from satellites', REMOTE SENSING OF ENVIRONMENT, 114 2448-2456 (2010)
DOI 10.1016/j.rse.2010.05.020
Citations Scopus - 47Web of Science - 47
Co-authors Shin-Chan Han
2010 Han S-C, Sauber J, Luthcke S, 'Regional gravity decrease after the 2010 Maule (Chile) earthquake indicates large-scale mass redistribution', GEOPHYSICAL RESEARCH LETTERS, 37 (2010)
DOI 10.1029/2010GL045449
Citations Scopus - 40Web of Science - 35
Co-authors Shin-Chan Han
2010 Han S-C, Ray RD, Luthcke SB, 'One centimeter-level observations of diurnal ocean tides from global monthly mean time-variable gravity fields', JOURNAL OF GEODESY, 84 715-729 (2010)
DOI 10.1007/s00190-010-0405-3
Citations Scopus - 8Web of Science - 7
Co-authors Shin-Chan Han
2010 Han S-C, Yeo I-Y, Alsdorf D, Bates P, Boy J-P, Kim H, et al., 'Movement of Amazon surface water from time-variable satellite gravity measurements and implications for water cycle parameters in land surface models', GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 11 (2010)
DOI 10.1029/2010GC003214
Citations Scopus - 11Web of Science - 12
Co-authors In-Young Yeo, Shin-Chan Han
2010 Mazarico E, Lemoine FG, Han S-C, Smith DE, 'GLGM-3: A degree-150 lunar gravity model from the historical tracking data of NASA Moon orbiters', JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 115 (2010)
DOI 10.1029/2009JE003472
Citations Scopus - 41Web of Science - 38
Co-authors Shin-Chan Han
2009 Han S-C, Kim H, Yeo I-Y, Yeh P, Oki T, Seo K-W, et al., 'Dynamics of surface water storage in the Amazon inferred from measurements of inter-satellite distance change', GEOPHYSICAL RESEARCH LETTERS, 36 (2009)
DOI 10.1029/2009GL037910
Citations Scopus - 32Web of Science - 30
Co-authors In-Young Yeo, Shin-Chan Han
2009 Han S-C, Mazarico E, Lemoine FG, 'Improved nearside gravity field of the Moon by localizing the power law constraint', GEOPHYSICAL RESEARCH LETTERS, 36 (2009)
DOI 10.1029/2009GL038556
Citations Scopus - 13Web of Science - 12
Co-authors Shin-Chan Han
2009 Egbert GD, Erofeeva SY, Han S-C, Luthcke SB, Ray RD, 'Assimilation of GRACE tide solutions into a numerical hydrodynamic inverse model', GEOPHYSICAL RESEARCH LETTERS, 36 (2009)
DOI 10.1029/2009GL040376
Citations Scopus - 12Web of Science - 11
Co-authors Shin-Chan Han
2008 Han S-C, Ditmar P, 'Localized spectral analysis of global satellite gravity fields for recovering time-variable mass redistributions', JOURNAL OF GEODESY, 82 423-430 (2008)
DOI 10.1007/s00190-007-0194-5
Citations Scopus - 19Web of Science - 17
Co-authors Shin-Chan Han
2008 Han S-C, 'Improved regional gravity fields on the Moon from Lunar Prospector tracking data by means of localized spherical harmonic functions', JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 113 (2008)
DOI 10.1029/2008JE003166
Citations Scopus - 19Web of Science - 16
Co-authors Shin-Chan Han
2008 Han S-C, Simons FJ, 'Spatiospectral localization of global geopotential fields from the Gravity Recovery and Climate Experiment (GRACE) reveals the coseismic gravity change owing to the 2004 Sumatra-Andaman earthquake', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 113 (2008)
DOI 10.1029/2007JB004927
Citations Scopus - 33Web of Science - 26
Co-authors Shin-Chan Han
2008 Seo KW, Wilson CR, Han SC, Waliser DE, 'Gravity Recovery and Climate Experiment (GRACE) alias error from ocean', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 113 (2008)
DOI 10.1029/2006JB004747
Citations Scopus - 18Web of Science - 18
Co-authors Shin-Chan Han
2008 Han S-C, Rowlands DD, Luthcke SB, Lemoine FG, 'Localized analysis of satellite tracking data for studying time-variable Earth's gravity fields', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 113 (2008)
DOI 10.1029/2007JB005218
Citations Scopus - 19Web of Science - 19
Co-authors Shin-Chan Han
2008 Han S-C, Sauber J, Luthcke SB, Ji C, Pollitz FF, 'Implications of postseismic gravity change following the great 2004 Sumatra-Andaman earthquake from the regional harmonic analysis of GRACE intersatellite tracking data', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 113 (2008)
DOI 10.1029/2008JB005705
Citations Scopus - 45Web of Science - 40
Co-authors Shin-Chan Han
2007 Han S-C, Ray RD, Luthcke SB, 'Ocean tidal solutions in Antarctica from GRACE inter-satellite tracking data', GEOPHYSICAL RESEARCH LETTERS, 34 (2007)
DOI 10.1029/2007GL031540
Citations Scopus - 16Web of Science - 14
Co-authors Shin-Chan Han
2007 Schmidt M, Fengler M, Mayer-Guerr T, Eicker A, Kusche J, Sanchez L, Han S-C, 'Regional gravity modeling in terms of spherical base functions', JOURNAL OF GEODESY, 81 17-38 (2007)
DOI 10.1007/s00190-006-0101-5
Citations Scopus - 62Web of Science - 59
Co-authors Shin-Chan Han
2006 Han S-C, Shum CK, Bevis M, Ji C, Kuo C-Y, 'Crustal dilatation observed by GRACE after the 2004 Sumatra-Andaman earthquake', SCIENCE, 313 658-662 (2006)
DOI 10.1126/science.1128661
Citations Scopus - 168Web of Science - 155
Co-authors Shin-Chan Han
2006 Schmidt M, Han SC, Kusche J, Sanchez L, Shum CK, 'Regional high-resolution spatiotemporal gravity modeling from GRACE data using spherical wavelets', GEOPHYSICAL RESEARCH LETTERS, 33 (2006)
DOI 10.1029/2005GL025509
Citations Scopus - 27Web of Science - 23
Co-authors Shin-Chan Han
2006 Han SC, Shum CK, Jekeli C, 'Precise estimation of in situ geopotential differences from GRACE low-low satellite-to-satellite tracking and accelerometer data', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 111 (2006)
DOI 10.1029/2005JB003719
Citations Scopus - 24Web of Science - 20
Co-authors Shin-Chan Han
2006 Han SC, Shum CK, Ditmar P, Visser P, van Beelen C, Schrama EJO, 'Aliasing effect of high-frequency mass variations on GOCE recovery of the earth's gravity field', JOURNAL OF GEODYNAMICS, 41 69-76 (2006)
DOI 10.1016/j.jog.2005.08.005
Citations Scopus - 5Web of Science - 5
Co-authors Shin-Chan Han
2005 Han SC, Shum CK, Jekeli C, Alsdorf D, 'Improved estimation of terrestrial water storage changes from GRACE', GEOPHYSICAL RESEARCH LETTERS, 32 (2005)
DOI 10.1029/2005GL022382
Citations Scopus - 60Web of Science - 50
Co-authors Shin-Chan Han
2005 Han SC, Shum CK, Matsumoto K, 'GRACE observations of M-2 and S-2 ocean tides underneath the Filchner-Ronne and Larsen ice shelves, Antarctica', GEOPHYSICAL RESEARCH LETTERS, 32 (2005)
DOI 10.1029/2005GL024296
Citations Scopus - 27Web of Science - 21
Co-authors Shin-Chan Han
2005 Han SC, Shum CK, Braun A, 'High-resolution continental water storage recovery from low-low satellite-to-satellite tracking', JOURNAL OF GEODYNAMICS, 39 11-28 (2005)
DOI 10.1016/j.jog.2004.08.002
Citations Scopus - 25Web of Science - 25
Co-authors Shin-Chan Han
2005 Han SC, Shum CK, Jekeli C, Kuo CY, Wilson C, Seo KW, 'Non-isotropic filtering of GRACE temporal gravity for geophysical signal enhancement', GEOPHYSICAL JOURNAL INTERNATIONAL, 163 18-25 (2005)
DOI 10.1111/j.1365-246X.2005.02756.x
Citations Scopus - 86Web of Science - 79
Co-authors Shin-Chan Han
2004 Han SC, 'Efficient determination of global gravity field from satellite-to-satellite tracking mission', CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY, 88 69-102 (2004)
DOI 10.1023/B:CELE.0000009383.07092.1f
Citations Scopus - 26Web of Science - 26
Co-authors Shin-Chan Han
2004 Han SC, Jekeli C, Shum CK, 'Time-variable aliasing effects of ocean tides, atmosphere, and continental water mass on monthly mean GRACE gravity field', JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 109 (2004)
DOI 10.1029/2003JB002501
Citations Scopus - 76Web of Science - 65
Co-authors Shin-Chan Han
2003 Han SC, Jekeli C, Shum CK, 'Static and temporal gravity field recovery using grace potential difference observables', Advances in Geosciences, 1 19-26 (2003)

The gravity field dedicated satellite missions like CHAMP, GRACE, and GOCE are supposed to map the Earth&apos;s global gravity field with unprecedented accuracy and resolution. Ne... [more]

The gravity field dedicated satellite missions like CHAMP, GRACE, and GOCE are supposed to map the Earth's global gravity field with unprecedented accuracy and resolution. New models of Earth's static and time-variable gravity field will be available every month as one of the science products from GRACE. Here we present an alternative method to estimate the gravity field efficiently using the in situ satellite-to-satellite observations at the altitude and show results on static as well as temporal gravity field recovery. Considering the energy relation between the kinetic energy of the satellite and the gravitational potential, the disturbing potential difference observations can be computed from the orbital parameter vectors in the inertial frame, using the high-low GPS-LEO GPS tracking data, the low-low satellite-to-satellite GRACE measurements, and data from 3-axis accelerometers (Jekeli, 1999). The disturbing potential observation also includes other potentials due to tides, atmosphere, other modeled signals (e.g. N-body) and the geophysical fluid signals (hydrological and oceanic mass variations), which should be recoverable from GRACE mission with a monthly resolution. The simulation results confirm that monthly geoid accuracy is expected to be a few cm with the 160 km resolution (up to degree and order 120) once other corrections are made accurately. The time-variable geoids (ocean and ground water mass) might be recovered with a noise-to-signal ratio of 0.1 with the resolution of 800 km every month assuming no temporal aliasing. © European Geosciences Union 2003.

Citations Scopus - 15
Co-authors Shin-Chan Han
2002 Han SC, Jekeli C, Shum CK, 'Efficient gravity field recovery using in situ disturbing potential observables from CHAMP', GEOPHYSICAL RESEARCH LETTERS, 29 (2002)
DOI 10.1029/2002GL015180
Citations Scopus - 47Web of Science - 26
Co-authors Shin-Chan Han
2001 Han SC, Kwon JH, Jekeli C, 'Accurate absolute GPS positioning through satellite clock error estimation', JOURNAL OF GEODESY, 75 33-43 (2001)
DOI 10.1007/s001900000151
Citations Scopus - 31Web of Science - 16
Co-authors Shin-Chan Han
Show 46 more journal articles

Conference (6 outputs)

Year Citation Altmetrics Link
2004 Schmidt M, Fabert O, Shum CK, Han SC, 'Gravity field determination using multiresolution techniques', European Space Agency, (Special Publication) ESA SP (2004)

In this paper we present results for modeling the Earth&apos;s gravitational field using spherical wavelets and applying methodologies for the estimation of the corresponding coef... [more]

In this paper we present results for modeling the Earth's gravitational field using spherical wavelets and applying methodologies for the estimation of the corresponding coefficients. The observation types in our techniques could either be gravity gradient tensor measurements from the Goce gradiometer, or other gravity mapping mission data such as the Grace low-low intersatellite KA-band range-rate, or Champ high-low intersatellite GPS phase data, or a combination of all the data types. Our approach allows both, either a wavelet-only solution or a combination of a spherical harmonics part with an corresponding spherical wavelet part. Using appropriate techniques for the solution of the resulting normal equation system, series coefficients up to a certain detail level can be estimated. Finally, we provide a demonstration of the developed methodology using simulated data.

Co-authors Shin-Chan Han
2004 Han SC, Shum CK, Ditmar P, Braun A, Kuo C, 'Effect of high-frequency temporal aliasing on GOCE gravity field solution', European Space Agency, (Special Publication) ESA SP (2004)

European Space Agency&apos;s Gravity field and steady state Ocean Circulation Explorer (GOCE) space gravity gradiometer (SGG) mission is anticipated to determine the mean gravity ... [more]

European Space Agency's Gravity field and steady state Ocean Circulation Explorer (GOCE) space gravity gradiometer (SGG) mission is anticipated to determine the mean gravity field of the Earth with an unprecedented geoid accuracy of several cm rms with wavelength of 130 km or longer. In a sun-synchronous, near-polar, circular orbit at an altitude of 250 km, GOCE senses not only static gravitational forces but also tides and other temporal signals resulting from mass variations of various Earth processes. These signals manifest as gravity field changes and include effects such as atmospheric loading on the Earth, ground water movement, oceanic mass variations, and ice mass flux changes. In this study, we investigate the high (temporal) frequency aliasing and mismodeling effects from ocean tides, atmosphere, and hydrological mass variations on the GOCE estimated gravity model complete to degree (N max ) 300 using simulated diagonal gravity gradient tensor measurements over a 2 month data span, applying frequency-dependent noise while ignoring the high-low GPS tracking data. Various mass variation effects have been computed for N max =60. It is concluded that the power spectral density (PSD) of the considered temporal mass variations generally has less magnitude than the measurements noise over all spectral bands. Only unmodeled total ocean tidal signals are found to have errors of a few mE/Hz 1/2 maximum within the measurement bandwidth. Specifically, S 2 and K 1 tides are significant for N max =90, while atmosphere and hydrological affects are significantly less on the two-month GOCE mean gravity solution. The measurement noise and regularization show ~15 cm RMS geoid error for a spatial scale 67 km or longer, and error due to other temporal mass variations is an order of magnitude smaller at 1-2 cm RMS. Future simulation studies include further assessment of GOCE gravity field errors at long wavelength components when high-low GPS tracking is included and for the cases of tidal perturbations at spatial frequencies shorter than N max =60.

Co-authors Shin-Chan Han
2004 Benjamin JJM, Yi Y, Kuo C, Braun A, Chen Y, Han SC, Shum CK, 'GOCE data product verification in the Mediterranean Sea', European Space Agency, (Special Publication) ESA SP (2004)

ESA&apos;s General Ocean Circulation Experiment (GOCE) mission is anticipated to generate Level 2 data products such as global geopotential model with geoid undulation accuracy of... [more]

ESA's General Ocean Circulation Experiment (GOCE) mission is anticipated to generate Level 2 data products such as global geopotential model with geoid undulation accuracy of 1 cm RMS with a spatial resolution of 130 km or longer. We propose a calibration and validation effort to verify GOCE measurements and data products including the Level 2 geopotential model in the Mediterranean Sea, a water body of 4000 km by 1000 km area. This study used the POCM_4B ocean dynamic topography and the dynamic topography computed using XBT data from NOAA/NODC WOA 2001 data to aid the evaluations of recent geoid models from CHAMP and GRACE. Altimetric mean sea surfaces (ERS-2 and TOPEX) are also used globally and regionally (in the Mediterranean Sea) to assess accuracy of current geoid models. Preliminary monthly comparisons of the GRACE geoid for 7 months using the WOA01 data show good agreement globally and reasonable agreement in the Mediterranean Sea. To validate the GOCE gravity tensor data, accurate knowledge of geoid undulation over Mediterranean Sea, is needed via an appropriate upward continuation to the GOCE altitude. The inaccurate in situ regional geoid could present a problem for calibration and validation of gravity mapping sensors such as GOCE.

Co-authors Shin-Chan Han
2004 Chen Y, Han SC, Schaffrin B, Shum CK, 'Calibration of CHAMP accelerometer observations for precise determination of insitu gravity measurements', Proceedings of the Annual Meeting - Institute of Navigation (2004)

The instruments onboard the CHAllenging Minisatellite Payload (CHAMP) include geodetic-quality, Blackjack-class, GPS receivers for precise orbit determination and a 3-axis Space T... [more]

The instruments onboard the CHAllenging Minisatellite Payload (CHAMP) include geodetic-quality, Blackjack-class, GPS receivers for precise orbit determination and a 3-axis Space Triaxial Accelerometer for Research (STAR) to measure non-conservative forces. These instruments are essential for precise orbit determination and gravity field estimation. However, it is necessary to correct well-known systematic errors such as constant bias, scale factor, and drift in the accelerometer data. The calibration cannot be implemented under the 1-g ground environment, it rather needs to be done in flight. There are several approaches to do this, for example, either by comparing observed non-conservative forces with the ones computed from the corresponding models, or during the process of gravity field estimation and orbit improvement. In this investigation we use a more direct method for the accelerometer calibration. We compute the 3-D non-conservative force vectors based on the kinematic acceleration of CHAMP and a reference gravity model, and then compare the computed non-conservative forces with the ones observed by the 3-D STAR. The difference between them indicates the practical imperfect performance of the accelerometer instrument. The observations are adjusted to the computed values, and the corresponding constant bias and drift factors in each axis are estimated in a least-squares sense. The results indicate that the constant biases are about 0.750mgal (in the radial direction), -0.353mgal (in the along-track direction) and 0.047mgal (in the cross-track direction). They are comparable to the results obtained from precise orbit determination (Kang et al. 2003) and other methods (Han et al. 2002), in which the calibration parameters were estimated using completely independent and different methods. After we have verified and calibrated the accelerometer observable, we determine the in-situ gravitational force vector at altitude by combining the kinematic acceleration and (calibrated) non-conservative acceleration. We then validate our in-situ gravity vectors based on the state-of-the-art recent gravity field models including EGM96, EIGEN2 and GGM01S; the results are reasonable.

Co-authors Shin-Chan Han
2004 Xie J, Ge S, Han SC, Shum CK, 'Implementation of parallel least square algorithm for gravity field inversion', Proceedings of the Annual Meeting - Institute of Navigation (2004)

The Gravity Recovery and Climate Experiment (GRACE) mission Launched in 2002 has provided accurate scientific products which help people gain new details on the Earth&apos;s gravi... [more]

The Gravity Recovery and Climate Experiment (GRACE) mission Launched in 2002 has provided accurate scientific products which help people gain new details on the Earth's gravity field. Meanwhile, this satellite mission also presents a computational challenge to analyze the large amount of data collected. To deal with this problem, much effort has been done to minimize the heavy computational burden (Gunter 2000; Han 2004). This paper focuses on applying parallel techniques in a straight forward way to estimate unknown geopotential coefficients. The gravity model is based on the energy conservative approach (Jekeli, 1999) that builds a direct connection between the in situ disturbed geopotential difference of two satellites and the position, velocity, range rate data obtained from the GPS, accelerometer and range instrument respectively carried aboard GRACE. The corresponding observation model is a simple linear equation which makes the construction of design matrix handy. Three major steps make up the whole processing procedures. The first is the creation of local contribution. The second is transformation of local information to global object. The last is Cholesky decomposition. We tested the implementations of two methods. The Normal Matrix Accumulation (NMA) method computes design matrix and normal matrix locally and accumulates them to global objects afterwards. The Design Matrix Accumulation (DMA) approach is to form small size of design matrix locally first and transfer to global scale, by matrix-matrix multiplication to obtain the global normal matrix. The creation of normal matrix occupies the majority of the whole wall time. Our preliminary results indicate that the NMA method is very fast but cannot be used to estimate very high degree and order coefficients due to the lack of memory. The DMA can solve for up to 120 degree and order in roughly 30 minutes.

Co-authors Shin-Chan Han
2004 Dietrich R, Wiehl M, Scheinert M, Shum C, Braun A, Han S, et al., 'Calibration/validation of GOCE data over Antarctica', European Space Agency, (Special Publication) ESA SP (2004)

European Space Agency&apos;s GOCE space gradiometer mission is anticipated to produce the mean gravity field model of the Earth with an unprecedented geoid accuracy of 1 cm RMS wi... [more]

European Space Agency's GOCE space gradiometer mission is anticipated to produce the mean gravity field model of the Earth with an unprecedented geoid accuracy of 1 cm RMS with wavelength at 130 km or longer. We propose an international effort for the calibration and validation of GOCE gravity gradient tensor measurements and Level 2 geopotential data product (1) in the region near Schirmacheroase, Dronning Maud Land, East Antarctica, and (2) at regions near the Syowa station, East Antarctica. These two regions have been well-surveyed by gravimeters, GPS traverse, tide gauge, airborne radar, meterological and satellite stations (VLBI, GPS, DORIS). They are currently participating or propose to participate in the calibration and validation of other spaceborne sensors, including GRACE, IceSat and CRYOSAT. In this paper, we provide a description of these calibration sites, a study of geoid accuracy in the Schiramcheroase region comparing the TU Dresden regional geoid with EGM96 and GRACE gravity field models and the approach for calibration of GOCE tensor gradient measurements. It is shown that an accurate in situ geoid and other associated measurements are required to successfully conduct GOCE calibrations.

Co-authors Shin-Chan Han
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Grants and Funding

Summary

Number of grants 14
Total funding $3,927,061

Click on a grant title below to expand the full details for that specific grant.


20171 grants / $77,718

Earthquake biases in measurements of Antarctica's sea-level contrubution$77,718

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Professor Shin-Chan Han, Professor Matt King
Scheme Discovery Projects
Role Lead
Funding Start 2017
Funding Finish 2019
GNo G1700493
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

20162 grants / $673,343

Lunar crustal structure from high-res gravity, topography, and seismic data$403,343

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Professor Shin-Chan Han, Professor William Featherstone, Assistant Professor Nicholas Schmerr
Scheme Discovery Projects
Role Lead
Funding Start 2016
Funding Finish 2019
GNo G1500244
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

Geophysical analysis of GRACE and GRACE-FO L1B and L2 data for earthquake cycle processes$270,000

Funding body: NASA

Funding body NASA
Project Team

Jeanne Sauber, Fred Pollitz, Riccardo Riva

Scheme GRACE Science Team
Role Lead
Funding Start 2016
Funding Finish 2019
GNo
Type Of Funding External
Category EXTE
UON N

20141 grants / $900,000

Development of Tensor Superconducting Gravity Gradiometer for Planetary Missions$900,000

Funding body: NASA

Funding body NASA
Project Team

Ho Jung Paik, Martin Moody, Shin-Chan Han, David Rowlands

Scheme Planetary Instrument Concepts for the Advancement of Solar System Observations (PICASSO)
Role Investigator
Funding Start 2014
Funding Finish 2017
GNo
Type Of Funding External
Category EXTE
UON N

20132 grants / $0

Superconducting Gravity Gradiometer for an Advanced Gravity Mission$0

Funding body: NASA

Funding body NASA
Project Team

Ho Jung Paik, Martin Moody, Shin-Chan Han, Peter Shirron, Bruce Bills, Chris Jekeli, CK Shum

Scheme Advanced Concepts in Space Geodesy
Role Investigator
Funding Start 2013
Funding Finish 2015
GNo
Type Of Funding External
Category EXTE
UON N

GRAIL refinements to lunar seismic structure$0

Funding body: NASA

Funding body NASA
Project Team

Renee Weber, Ed Garnero, Peiying Lin, Nick Schmerr, Mike Thorne, Shin-Chan Han

Scheme GRAIL Guest Scientist Program
Role Investigator
Funding Start 2013
Funding Finish 2014
GNo
Type Of Funding External
Category EXTE
UON N

20122 grants / $720,000

Geophysical Inversion of GRACE Level-1B Data to Advance Earthquake and Hydrological Models$600,000

Funding body: NASA

Funding body NASA
Project Team

Shin-Chan Han, Jeanne Sauber, In-Young Yeo, Junkee Rhie, Taikan Oki, Paul Bates, Scott Luthcke, David Rowlands

Scheme GRACE Science Team
Role Lead
Funding Start 2012
Funding Finish 2016
GNo
Type Of Funding External
Category EXTE
UON N

GRACE and Tides$120,000

Funding body: NASA

Funding body NASA
Project Team

Richard Ray, Gary Egbert, Shin-Chan Han, Scott Luthcke, David Rowlands

Scheme GRACE Science Team
Role Investigator
Funding Start 2012
Funding Finish 2016
GNo
Type Of Funding External
Category EXTE
UON N

20101 grants / $300,000

Improved Global Gravity Fields on the Moon from Re-analysis of Lunar Prospector Radio Tracking Data$300,000

Funding body: NASA

Funding body NASA
Project Team

Shin-Chan Han, Frank Lemoine, Erwan Mazarico, David Rowlands

Scheme Lunar Advanced Science And Exploration Research
Role Lead
Funding Start 2010
Funding Finish 2014
GNo
Type Of Funding External
Category EXTE
UON N

20091 grants / $400,000

Improved gravity fields on Mars by means of localized harmonic analysis$400,000

Funding body: NASA

Funding body NASA
Project Team

Shin-Chan Han, Frank Lemoine, Erwan Mazarico, Gregory Neumann, David Rowlands

Scheme Mars Data Analysis Program
Role Lead
Funding Start 2009
Funding Finish 2014
GNo
Type Of Funding External
Category EXTE
UON N

20084 grants / $856,000

High-resolution regional analysis of GRACE data for validation of time-variable gravity and earthquake-triggered change$455,000

Funding body: NASA

Funding body NASA
Project Team

Shin-Chan Han

Scheme GRACE Science Team
Role Lead
Funding Start 2008
Funding Finish 2013
GNo
Type Of Funding External
Category EXTE
UON N

Improved crust/mantle dynamics and state of stress models from the combination of satellite gravity and seismic data$266,000

Funding body: NASA

Funding body NASA
Project Team

Shin-Chan Han

Scheme Earth Surface and Interior
Role Lead
Funding Start 2008
Funding Finish 2013
GNo
Type Of Funding External
Category EXTE
UON N

Tides from GRACE and Other Data$75,000

Funding body: NASA

Funding body NASA
Project Team

Richard Ray, Gary Egbert, Shin-Chan Han, Scott Luthcke, David Rowlands

Scheme GRACE Science Team
Role Investigator
Funding Start 2008
Funding Finish 2011
GNo
Type Of Funding External
Category EXTE
UON N

Methodology for Improved Time-Variable Gravity from GRACE$60,000

Funding body: NASA

Funding body NASA
Project Team

Frank Lemoine, Oscar Colombo, Shin-Chan Han, Steve Klosko, Scott Luthcke, David Rowlands

Scheme GRACE Science Team
Role Investigator
Funding Start 2008
Funding Finish 2011
GNo
Type Of Funding External
Category EXTE
UON N
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Research Supervision

Number of supervisions

Completed0
Current4

Total current UON EFTSL

PhD3.1

Current Supervision

Commenced Level of Study Research Title Program Supervisor Type
2017 PhD Ground Water Storage Changes in Major River Basins in China from Geodetic and Remote Sensing Techniques PhD (Environmental Eng), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor
2017 PhD Analysis of Time-Variable Gravity Signal from GRACE Data PhD (Surveying), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor
2015 PhD GNSS (Global Navigation Satellite System) reflectometry applications for estimating soil moisture and sea level changes PhD (Surveying), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor
2015 PhD Regional Mass Variation from Geodetic Observations and Implication on Australian Water Cycle PhD (Surveying), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor
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Research Collaborations

The map is a representation of a researchers co-authorship with collaborators across the globe. The map displays the number of publications against a country, where there is at least one co-author based in that country. Data is sourced from the University of Newcastle research publication management system (NURO) and may not fully represent the authors complete body of work.

Country Count of Publications
United States 58
Germany 8
Netherlands 8
Australia 6
Japan 6
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News

Professor Shin-Chan Han

A shift in perspective: Australia found to tilt and gyrate with the weather

November 11, 2016

A world-first discovery from the University of Newcastle (UON) has shown the continent of Australia tilts and shifts in a coherent gyrating motion as a result of seasonal weather patterns across the globe.

Satellite over Earth

NASA recruits UON scientist for climate change mission

November 8, 2016

NASA has appointed University of Newcastle (UON) Professor Shin-Chan Han as part of an elite research group aimed at measuring climate change from space.

Australian Research Council (ARC)

ARC Discovery Projects funding success 2016

November 5, 2015

Professor Dr Shin-Chan Han, Professor Dr William Featherstone and Assistant Professor Nicholas Schmerr been awarded $393,000 in ARC Discovery Project funding commencing in 2016 for their research project Lunar crustal structure from high-res gravity, topography, and seismic data.

Shin-Chan Han

ABC NEWS: Newcastle scientist on mission to understand the ever-changing earth

November 2, 2015

From NASA to Newcastle. Professor Shin-Chan Han is using data collected from global disasters to find out more about how the world is changing.

Shin-Chan Han

Geodesy professor from NASA to Newcastle

April 17, 2015

Professor Shin-Chan Han, from the NASA Goddard Space Flight Centre, has been appointed to the School of Engineering in the Faculty of Engineering and Built Environment.

Professor Shin-Chan Han

Position

Professor
School of Engineering
Faculty of Engineering and Built Environment

Contact Details

Email shin-chan.han@newcastle.edu.au
Phone (02) 4921 5432
Fax (02) 4921 6991
Link Personal webpage

Office

Room EA 106
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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