Ting Yuan (NASA Earth and Space Science Fellowship), Ph.D. University of Houston, 2017. Now PostDoc at UCLA.
Zhiyue Sun, Ph.D. Student, BS, MS Harbin Institute of Technology
Modurodoluwa Okeowo, Ph.D. Student, BS University of Lagos, MS Purdue University
Ning Cao, Ph.D. University of Houston, 2016. Now PostDoc at UH.
Abureli Aierken, Ph.D. Student, BS Peking University, MS University of Camerino
Donghwan Kim, Ph.D. Student, BS Korea Military Academy, MS Cranfield University
Chi-Hung Chang, Ph.D. Student, BS, MS National Cheng Kung University
Tien Du, Ph.D. Student, BS Ritsumeikan Asia Pacific University, MS University of Melbourne
Jinkyoo Choi, Ph.D. Student, BS University of Wyoming, MS University of Houston
Ning Cao, Ph.D. University of Houston, 2016.
Hanwen Yu, Ph.D. Xidian University, 2012.
Outstanding students who are interested in pursuing graduate degree in an interdisciplinary field of geodesy and remote sensing are strongly encouraged to contact me at hlee [at] uh [dot] edu with your CV to inquire about possible research assistantships.
Awards & Honors:
Dr. Lee specializes in using spaceborne and airborne geodetic instruments including satellite altimetry, SAR/InSAR, and GRACE to better understand earth system sciences. His primary research focus includes quantifying and characterizing terrestrial water dynamics using remote sensing data towards applications for water resources management.
Sponsored Research / Research Grant:
Peer-Reviewed Journal Articles:
Google Scholar Profile: https://scholar.google.com/citations?user=Rp_Bl3gAAAAJ&hl=en
* Denote advisee
Bose, I., F. Hossain, H. Eldardiry, N.K. Biswas, S. Ahmad, M. Ashraf, B. Fatimah, N. Iqbal, F. Hasan, A.Z. Bhatti, H. Lee, M. Aziz, Integrating gravimetry data with thermal infra-red data from satellites to improve efficiency of operational irrigation advisory in South Asia, Water Resources Research, in review, 2020.
Biswas, N., F. Hossain, M. Bonnema, H. Lee, F. Chishtie, Towards a global reservoir assessment tool for predicting hydrologic impact and operating pattern of existing and planned reservoirs, Environmental Modelling & Software, revised, 2020.
Hu, X., R. Bürgmann, E.J. Fielding, H. Lee, Internal kinematics of the Slumgullion landslide (USA) from high-resolution UAVSAR InSAR data, Remote Sensing of Environment, 251, 112057, 2020.
Du, T.L.T.*, H. Lee, D.D. Bui, B. Arheimer, H.-Y. Li, J. Olsson, S.E. Darby, J. Sheffield, D. Kim*, E. Hwang, Streamflow prediction in "geopolitically ungauged" basins using satellite observations and regionalization at subcontinental scale, Journal of Hydrology, 588, 125016, 2020.
Chang, C.-H.*, H. Lee, D. Kim*, E. Hwang, F. Hossain, F. Chishtie, S. Jayasinghe, S. Basnayake, Hindcast and forecast of daily inundation extents using satellite SAR and altimetry data with rotated empirical orthogonal function analysis: case study in Tonle Sap Lake Floodplain, Remote Sensing of Environment, 241, 111732, 2020.
Lee, H., T. Yuan*, H. Yu*, H.C. Jung, Interferometric SAR for wetland hydrology: An overview of methods, challenges, and trends, IEEE Geoscience and Remote Sensing Magazine (Invited for Special Issue of "Synthetic Aperture Radar Interferometry"), 8, 120-135, doi:10.1109/MGRS.2019.2958653, 2020.
Kim, D.*, H. Lee, H.C. Jung, E. Hwang, F. Hossain, M. Bonnema, D.-K. Kang, A. Getirana, Monitoring river basin development and variation in water resources in transboundary Imjin River in North and South Korea using remote sensing, Remote Sensing, 12, 195, doi:10.3390/rs12010195, 2020.
Kim, D.*, H. Lee, C.-H. Chang, D.D. Bui, S. Jayasinghe, S. Basnayake, F. Chistie, E. Hwang, Daily river discharge estimation using multi-mission radar altimetry data and Ensemble Learning Regression in lower Mekong River Basin, Remote Sensing, 11, 2684, doi:10.3390/rs11222684, 2019.
Yuan, T.*, H. Lee, H. Yu*, H.C. Jung, A. Madson, Y. Sheng, E. Beighley, Mapping forested floodplain topography using InSAR and radar altimetry, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 12, 5189-5198, 2019.
Kim, D.*, H. Lee, E. Beighley, R.M. Tshimanga, Estimating discharges for poorly gauged river basin using ensemble learning regression with satellite altimetry data and a hydrologic model, Advances in Space Research, doi:10.1016/j.asr.2019.08.018, 2019.
Nickles, C., Y. Zhao, E. Beighley, M. Durand, C. David, H. Lee, How does the unique space-time sampling of the Surface Water and Ocean Topography (SWOT) Mission influence river discharge series characteristics?, Geophysical Research Letters, 46, 8154-8161, https://doi.org/10.1029.2019GL083886, 2019.
Sikder, S., S. Ahmad, F. Hossain, A. Gebregiorgis, H. Lee, Case study: Rapid urban inundation forecasting technique based on quantitative precipitation forecast for Houston and Harris County Flood Control District, Journal of Hydrologic Engineering, 10.1061/(ASCE)HE.1943-5584.0001807, 05019017, 2019.
Van Den Hoek, J., A. Getirana, H.C. Jung, M. Okeowo*, H. Lee, Monitoring reservoir drought dynamics with Landsat and radar altimetry time series in persistently cloudy eastern Brazil, Remote Sensing, 11, 827, doi:10.3390/rs11070827, 2019.
Markert, K.N., S.T. Pulla, H. Lee, A.M. Markert, E.R. Anderson, M.A. Okeowo*, A.S. Limaye, AltEx: An open source web application and toolkit for accessing and exploring altimetry datasets, Environmental Modelling & Software, 117, 164-175, 2019.
Yu, H.*, H. Lee, N. Cao*, Y. Lan, Optimal baseline design for multi-baseline InSAR phase unwrapping, IEEE Transactions on Geoscience and Remote Sensing, 57, 5738-5750, 2019.
Yu, H.*, Y. Lan, Z. Yuan, J. Xu, H. Lee, A review on phase unwrapping in InSAR signal processing, IEEE Geoscience and Remote Sensing Magazine, 7, 40-58, 2019.
Kim, D.*, H. Yu*, H. Lee, E. Beighley, M. Durand, D.E. Alsdorf, E. Hwang, Ensemble learning regression for estimating river discharges using satellite altimetry data: central Congo River as a test-bed, Remote Sensing of Environment, 221, 741-755, 2019.
Chang, C.-H.*, H. Lee, F. Hossain, S. Basnayake, S. Jayasinghe, F. Chishtie, D. Saah, H. Yu, K. Sothea, D.D. Bui, A model-aided satellite altimetry based flood forecasting system for Mekong River, Environmental Modelling & Software, 112, 112-127, 2019.
Kim, S.P., H.-G. Sohn, M.-K. Kim, H. Lee, Analysis of the relationship among flood severity, precipitation, and deforestation in Tonle Sap Lake, Cambodia using multi-sensor approach, KSCE Journal of Civil Engineering, https://doi.org/10.1007/s12205-019-1061-7, 2019.
Biswas, N.K., F. Hossain, M. Bonnema, M. Okeowo*, H. Lee, An altimeter height extraction technique for dynamically changing rivers of South and South-East Asia, Remote Sensing of Environment, 221, 24-37, 2019.
Yu, H.*, Y. Lan, H. Lee, N. Cao*, 2-D phase unwrapping using minimum infinity-norm, IEEE Geoscience and Remote Sensing Letters, 15, 1887-1891, 2018.
Hiep, N.H.H., N.D. Luong, T.T.V. Nga, B.T. Hieu, U.T.T. Ha, B.D. Duong, V.D. Long, F. Hossain, H. Lee, Hydrological model using ground- and satellite-based data for river flow simulation towards supporting water resource management in the Red River Basin, Vietnam, Journal of Environmental Management, 217, 346-355, 2018.
Cao, N.*, H. Lee, H.C. Jung, H. Yu*, Estimation of water level changes of large-scale Amazon wetlands using ALOS2 ScanSAR differential interferometry, Remote Sensing, 10, 966, doi:10.3390/rs10060966, 2018.
Cao, N.*, H. Yu*, H. Lee, A multi-baseline InSAR phase unwrapping method using designed optimal baselines obtained by motion compensation algorithm, IEEE Geoscience and Remote Sensing Letters, 15, 1219-1223, 2018.
Du, T.L.T.*, D.D. Bui, M.D. Nguyen, H. Lee, Satellite-based, multi-indices for evaluation of agricultural droughts in a highly dynamic tropical catchment, central Vietnam, Water, 10, 659, doi:10.3390/w10050659, 2018.
Yu, H.*, H. Lee, T. Yuan*, N. Cao*, A novel method for deformation estimation based on multi-baseline InSAR phase unwrapping, IEEE Transactions on Geoscience and Remote Sensing, 56, 5231-5243, 2018.
Cao, N.*, H. Lee, E. Zaugg, R. Shrestha, W. Carter, C. Glennie, Z. Lu, H. Yu*, Estimation of residual motion errors in airborne SAR interferometry based on time-domain backprojection and multisquint techniques, IEEE Transactions on Geoscience and Remote Sensing, 56, 2397-2407, 2018.
Yuan, T.*, H. Lee, H.C. Jung, A. Aierken*, E. Beighley, D. Alsdorf, R. Tshimanga, D. Kim*, Absolute water storages in the Congo River floodplains from integration of InSAR and satellite radar altimetry, Remote Sensing of Environment, 201, 57-72, 2017.
Kim, D.*, H. Lee, A. Laraque, R. Tshimanga, T. Yuan*, H. Jung, E. Beighley, C.-H. Chang*, Mapping spatio-temporal water level variations over the central Congo River using PALSAR ScanSAR and Envisat altimetry data, International Journal of Remote Sensing, 38, 7021-7040, 2017.
Cao, N.*, H. Lee, E. Zaugg, R. Shrestha, W. Carter, C. Glennie, G. Wang, Z. Lu, J.C. Fernandez-Diaz, Airborne DInSAR results using time-domain backprojection algorithm: a case study over the Slumgullion landslide in Colorado, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 10, 4987-5000, 2017.
Yu, H.*, Y. Lan, J. Xu, D. An, H. Lee, Large-scale L0-norm and L1-norm two-dimensional phase unwrapping, IEEE Transactions on Geoscience and Remote Sensing, 55, 4712-4728, 2017.
Okeowo, M.*, H. Lee, F. Hossain, A. Getirana, Automated generation of lakes and reservoirs water elevation changes from satellite radar altimetry, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 10, 3465-3481, 2017.
Xiao, M., A. Koppa, Z. Mekonnen, B. Pagan, S. Zhan, Q. Cao, A. Aierken*, H. Lee, D. Lettenmaier, How much groundwater did California's Central Valley lose during the 2012-2015 drought?, Geophysical Research Letters, 44, doi:10.1002/2017GL073333, 2017.
Kim, D.*, H. Lee, M.A. Okeowo*, S. Basnayake, S. Jayasinghe, Cost-effective monitoring of land subsidence in developing countries using semi-permanent GPS stations: a test study over Houston, Texas, Journal of Applied Remote Sensing, 11(2), 026033, doi:10.1117/1.JRS.11.026033, 2017.
Hossain, F., S. Sikder, N. Biswas, M. Bonnema, H. Lee, N.D. Luong, N.H. Hiep, B.D. Duong, D. Long, Predicting water availability of the regulated Mekong River Basin using satellite observations and a physical model, Asian Journal of Water, Environment and Pollution, 14, 39-48, 2017.
Iqbal, N., F. Hossain, H. Lee, G. Akhter, Integrated groundwater resource management in Indus Basin using satellite gravimetry and physical modeling tools, Environmental Monitoring and Assessment,189:128, doi:10.1007/s10661-017-5846-1, 2017.
Sun, Z.*, H. Lee, Y. Ahn, A. Aierken*, K.-H. Tseng, M.A. Okeowo*, C. Shum, Recent glacier dynamics in the northern Novaya Zemlya observed by multiple geodetic techniques, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 10, 1290-1302, 2017.
Iqbal, N., F. Hossain, H. Lee, G. Akhter, Satellite gravimetric estimation of groundwater storage variations over Indus Basin in Pakistan, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 9, 3524-3534, 2016.
Alsdorf, D., E. Beighley, A. Laraque, H. Lee, R. Tshimanga, F. O'Loughlin, G. Mahe, B. Dinga, G. Moukandi, R.G.M. Spencer, Opportunities for hydrologic research in the Congo Basin, Reviews of Geophysics, 54, doi:10.1002/2016RG000517, 2016.
Bonnema, M., S. Sikder, Y. Miao, X. Chen, F. Hossain, I.A. Pervin, S.M.M. Rahman, H. Lee, Understanding satellite-based monthly-to-seasonal reservoir outflow estimation as a function of hydrologic controls, Water Resources Research, 52, 4095-4115, doi:10.1002/2015WR017830, 2016.
Cao, N.*, H. Lee, H.C. Jung, A phase-decomposition-based PS-InSAR method, IEEE Transactions on Geoscience and Remote Sensing, 54, 1074-1090, 2016.
Yoon, Y., E. Beighley, H. Lee, T. Pavelsky, G. Allen, Estimating flood discharges in reservoir-regulated river basins by integrating synthetic SWOT satellite observations and hydrologic modeling, Journal of Hydrologic Engineering, 10.1061/(ASCE)HE.1943-5584.0001320, 05015030, 2015.
Cao, N.*, H. Lee, H.C. Jung, Mathematical framework for phase triangulation algorithms in distributed scatterer interferometry, IEEE Geoscience and Remote Sensing Letters, 12, 1838-1842, 2015.
Yuan, T.*, H. Lee, H.C. Jung, Toward estimating wetland water level changes based on hydrological sensitivity analysis of PALSAR backscattering coefficients over different vegetation fields, Remote Sensing, 7, 3153-3183, 2015.
Lee, H., T. Yuan*, H.C. Jung, E. Beighley, Mapping wetland water depths over the central Congo Basin using PALSAR ScanSAR, Envisat altimetry, and MODIS VCF data, Remote Sensing of Environment, 159, 70-79, 2015.
R.E. Beighley, K. Eggert, C.J. Wilson, J.C. Rowland, H. Lee, A hydrologic routing model suitable for climate scale simulations of arctic rivers: application to the Mackenzie River Basin, Hydrological Processes, 29, 2751-2768, 2015.
TSENG, K.-H., S. LIANG, M. IBARAKI, H. LEE, C. SHUM, Study of the variation of schistosomiasis risk in Lake Poyang in the People's Republic of China using multiple space-borne sensors for the monitoring and modelling, Geospatial Health, 8, 353-364, 2014.
Hossain, F., C. Shum, A. Limaye, S. Biancamaria, H. Lee, S. Akbor, W. Yigzaw, A guide for crossing the Valley of Death: Lessons learned from making a satellite based flood forecasting system operational and independently owned by a stakeholder agency, Bulletin of the American Meteorological Society, 95, 1201-1207, 2014.
KIM, J.-W., Z. LU, J.W. JONES, C. SHUM, H. LEE, Y. JIA, Monitoring Everglades freshwater marsh water level using L-band synthetic aperture radar backscatter, Remote Sensing of Environment, 150, 66-81, 2014.
HOSSAIN, F., A. SIDDIQUE-E-AKBOR, L.C. Mazumber, S.M. ShahNewaz, S. BIANCAMARIA, H. LEE, C. SHUM, Proof of concept of an altimeter-based river forecasting system for transboundary flow inside Bangladesh, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 7, 587-601, 2014.
TSENG, K.-H., C. SHUM, Y. YI, C.-Y. KUO, H. LEE, H. WANG, Improved retrieval of coastal sea surface height by retracking modified radar altimetry waveforms, IEEE Transactions on Geoscience and Remote Sensing, 52, 991-1001, 2014.
TSENG, K.-H., C. SHUM, Y. YI, H. LEE, X. CHENG, X. WANG, Envisat altimetry radar waveform retracking of quasi-specular echoes over ice-covered Qinghai Lake, Terrestrial, Atmospheric and Oceanic Sciences, 24, 615-627, 2013.
LEE, H., C. SHUM, K.-H. TSENG, Z. HUANG, H.-G. SOHN, Elevation changes of Bering Glacier System, Alaska, from 1992-2010, observed by satellite radar altimetry, Remote Sensing of Environment, 132, 40-48, 2013.
JUNG, H., M. JASINSKI, J.-W. KIM, C.K. SHUM, P. BATES, J. NEAL, H. LEE, D. ALSDORF, Calibration of two-dimensional floodplain modeling in the Atchafalaya River Basin using SAR interferometry, Water Resources Research, 48, W07511, doi:10.1029/2012WR011951, 2012.
YAMAZAKI, D., H. LEE, D. ALSDORF, E. DUTRA, H. KIM, S. KANAE, T. OKI, Predictability of water level dynamics by a global river model: a case study on the hydrodynamics in the Amazon River, Water Resources Research, 48, W09508, doi:10.1029/2012WR011869, 2012.
WANG, L., C. SHUM, F. SIMONS, A. TASSARA, K. ERKAN, C. JEKELI, A. BRAUN, C. KUO, H. LEE, D.-N. YUAN, Coseismic slip and incomplete moment release of the 2010 Mw 8.8 Great Maule, Chile, Earthquake quantified by the inversion of GRACE observations, Earth and Planetary Science Letters, 335-336, 167-179, 2012.
KUO, C.-Y., H.-C. KAO, H. LEE, K.-C. CHENG, L.-C. LIN, Assessment of radar waveform retracked Jason-2 altimetry sea surface heights near Taiwan coastal ocean, Marine Geodesy, 35, 188-197, 2012.
LEE, H., C. SHUM, I. HOWAT, A. MONAGHAN, Y. AHN, J. DUAN, J. GUO, C.Y. KUO, L. WANG, Continuously accelerating ice loss over Amundsen Sea catchment, West Antarctica, revealed by integrating altimetry and GRACE data, Earth and Planetary Science Letters, 321-322, 74-80, 2012.
LEE, H., R.E. BEIGHLEY, D. ALSDORF, H.C. JUNG, C. SHUM, J. DUAN, J. GUO, D. YAMAZAKI, K. ANDREADIS, Characterization of terrestrial water dynamics in the Congo Basin using GRACE and satellite radar altimetry, Remote Sensing of Environment, 115, 3530-3538, 2011.
SIDDIQUE-E-AKBOR, A.H., F. HOSSAIN, H. LEE, C. SHUM, Accuracy of satellite altimetry for river level detection in complex deltaic environments using a hydrologic-hydraulic modeling approach, Remote Sensing of Environment, 115, 1522-1531, 2011.
JUNG, H.C., D. ALSDORF, M. MORITZ, H. LEE, S. VASSOLO, Flood inundation mapping in the Logone floodplain from multi temporal Landsat ETM+ imagery, Physics and Chemistry of the Earth, 36, 232-240, 2011.
BEIGHLEY, R.E., R.L. RAY, Y. HE, H. LEE, L. SCHALLER, M. DURAND, K.M. ANDREADIS, D. ALSDORF, C. SHUM, Comparing satellite derived precipitation datasets using the Hillslope River Routing (HRR) model in the Congo River Basin, Hydrological Processes, doi:10.1002/hyp.8045, 2011.
SHUM, C., H. LEE, P.A.M. ABUSALI, A. BRAUN, G. DE CARUFEL, G. FOTOPOULOS, A. KOMJATHY, C.-Y. KUO, Prospects of Global Navigation Satellite System (GNSS) reflectometry for geodynamics studies, Advances in Space Research, 47, 1814-1822, 2011.
LEE, H., C. SHUM, K.-H. TSENG, J.-Y. GUO, C.-Y. KUO, Present-day lake level variation from Envisat altimetry over the northeastern Qinghai-Tibetan Plateau: links with precipitation and temperature, Terrestrial Atmospheric and Oceanic Sciences, 22, 169-175, 2011.
ERKAN, K., C. SHUM, H. LEE, C. JEKELI, W.R. PANERO, L. WANG, H. WANG, Possible constraints on the vertical processes interior of the Qinghai-Tibetan Plateau and their effects on satellite geodetic signals, Terrestrial Atmospheric and Oceanic Sciences, 22, 241-253, 2011.
TSENG, K.-H., C. SHUM, H. LEE, J. DUAN, C.-Y. KUO, Satellite Observed Environmental Changes over the Qinghai-Tibetan Plateau, Terrestrial Atmospheric and Oceanic Sciences, 22, 229-239, 2011.
LEE, H., C. SHUM, W. EMERY, S. CALMANT, X. DENG, C. ROESLER, C.-Y. KUO, Y. Yi, Validation of Jason-2 altimeter data by waveform retracking over California coastal ocean, Marine Geodesy, 33, 304-316, 2010.
TSENG, K.-H., C. SHUM, Y. Yi, C. DAI, H. LEE, D. BILITZA, A. KOMJATHY, C.-Y. KUO, J. PING, M. SCHMIDT, Regional validation of Jason-2 dual-frequency ionosphere delays, Marine Geodesy, 33, 272-284, 2010.
LEE, H., M. DURAND, H. JUNG, D. ALSDORF, C. SHUM, Y. SHENG, Characterization of surface water storage change in Arctic lakes using simulated SWOT measurements, International Journal of Remote Sensing, 31, 3931-3953, 2010 (FRONT COVER).
ZHANG, M., H. LEE, C. SHUM, D. ALSDORF, F. SCHWARTZ, S. TSENG, Y. Yi, C.-Y. KUO, H.-Z. TSENG, A. BRAUN, S. CALMANT, N. FILIZOLA, F. SEYLER, Application of retracked satellite altimetry for inland hydrologic studies, International Journal of Remote Sensing, 31, 3913-3929, 2010.
JUNG, H., J. HAMSKI, M. DURAND, D. ALSDORF, F. HOSSAIN, H. LEE, A.K.M.A. HOSSAIN, K. HASAN, A.S. KHAN, A.K.M.Z. HOQUE, Characterization of complex fluvial systems via remote sensing of spatial and temporal water level variations, Earth Surface Processes and Landforms, 35, 294-304, 2010.
SHUM, C., P.A.M. ABUSALI, C.-Y. KUO, H. LEE, J. OGLE, R.K. RANEY, J.C. RIES, W.H.F. SMITH, D. SVEHLA, C. ZHAO, Orbit accuracy requirement for ABYSS: the space station radar altimeter to map global bathymetry, IEEE Geoscience and Remote Sensing Letters, 6, 653-657, 2009.
LEE, H., C. SHUM, Y. YI, M. IBARAKI, J.-W. KIM, A. BRAUN, C.-Y. KUO, Z. LU, Louisiana wetland water level monitoring using retracked TOPEX/POSEIDON altimetry, Marine Geodesy, 32, 284-302, 2009.
LU, Z., J.-W. KIM, H. LEE, C. SHUM, J. DUAN, M. IBARAKI, O. AKYILMAZ, C.-H. READ, Helmand river hydrologic studies using ALOS PALSAR InSAR and ENVISAT altimetry, Marine Geodesy, 32, 320-333, 2009.
KIM, J.-W., Z. LU, H. LEE, C. SHUM, C.M. SWARZENSKI, T.W. DOYLE, S.-H. BAEK, Integrated analysis of PALSAR/Radarsat-1 InSAR and ENVISAT altimeter data for mapping absolute water level changes in Louisiana wetlands, Remote Sensing of Environment, 113, 2356-2365, 2009.
LEE, H., C. SHUM, Y, YI, A. BRAUN, C.-Y. KUO, Laurentia crustal motion observed using TOPEX/POSEIDON radar altimetry over land, Journal of Geodynamics, 46, 182-193, 2008.
LEE, H., C. SHUM, C.-Y. KUO, Y. YI, A. BRAUN, Application of TOPEX altimetry for solid Earth deformation studies, Terrestrial Atmospheric and Oceanic Sciences, 19, 37-46, 2008.
KWOUN, O., S. BAEK, H. LEE, H.-G. SOHN, U. HAN, C. SHUM, Topography, vertical and horizontal deformation in the Sulzberger Ice Shelf, West Antarctica using InSAR, Korean Journal of Remote Sensing, 21, 73-81, 2005.