Jeffrey P. Walker

According to our database, Jeffrey P. Walker authored at least 132 papers between 2001 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2024

Comparison Between Thermal-Optical and L-Band Passive Microwave Soil Moisture Remote Sensing at Farm Scales: Towards UAV-Based Near-Surface Soil Moisture Mapping.

Nan Ye, Jeffrey P. Walker, Ying Gao, Ivan Popstefanija, James Hills

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024

Evaluation of the Bayesian Downscaling Algorithm for Achieving Higher Resolution Soil Moisture Data.

Xiaoling Wu, Jeffrey P. Walker, Nan Ye

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024

A Comparison of Passive Microwave Emission Models for Estimating Brightness Temperature at L- and P-Bands Under Bare and Vegetated Soil Conditions.

Foad Brakhasi, Jeffrey P. Walker, Jasmeet Judge, Pang-Wei Liu, Xiaoji Shen, Nan Ye, Xiaoling Wu, In-Young Yeo, Nithyapriya Boopathi, Edward J. Kim, Yann H. Kerr, Thomas J. Jackson

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024

2023

Toward an Improved Surface Roughness Parameterization Model for Soil Moisture Retrieval in Road Construction.

Thi Mai Nguyen, Jeffrey P. Walker, Nan Ye, Jayantha Kodikara

IEEE Trans. Geosci. Remote. Sens., 2023

Evaluation of the Tau-Omega Model Over a Dense Corn Canopy at P- and L-Band.

Xiaoji Shen, Jeffrey P. Walker, Nan Ye, Xiaoling Wu, Foad Brakhasi, Liujun Zhu, Edward Kim, Yann Kerr, Thomas J. Jackson

IEEE Geosci. Remote. Sens. Lett., 2023

Performance of SMOS Soil Moisture Products Over Core Validation Sites.

Andreas Colliander, Yann Kerr, Jean-Pierre Wigneron, A. Al-Yaari, Nemesio Rodriguez-Fernandez, Xiaojun Li, Julian Chaubell, Philippe Richaume, Arnaud Mialon, Jun Asanuma, Aaron A. Berg, David D. Bosch, Todd Caldwell, Michael H. Cosh, Chandra D. Holifield Collins, José Martínez-Fernández, Heather McNairn, Mark S. Seyfried, Patrick J. Starks, Z. Bob Su, Marc Thibeault, Jeffrey P. Walker

IEEE Geosci. Remote. Sens. Lett., 2023

Evaluating the Accuracy of Passive Microwave Emission Models for Estimating Brightness Temperature.

Foad Brakhasi, Jeffrey P. Walker, Jasmeet Judge, Pang-Wei Liu, Nan Ye, In-Young Yeo

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2023

2022

Inter-Comparison of Proximal Near-Surface Soil Moisture Measurement Techniques.

Xiaoling Wu, Jeffrey P. Walker, François Jonard, Nan Ye

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2022

Application of a Change Detection Soil Moisture Retrieval Algorithm to Combined, Semiconcurrent Radiometer, and Radar Observations.

Jeffrey D. Ouellette, Tanish P. Himani, Li Li, Elizabeth M. Twarog, Andreas Colliander, David C. Goodrich, Chandra D. Holifield Collins, Michael H. Cosh, Jeffrey P. Walker

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2022

Validation of Soil Moisture Data Products From the NASA SMAP Mission.

Andreas Colliander, Rolf H. Reichle, Wade T. Crow, Michael H. Cosh, Fan Chen, Steven Chan, Narendra Narayan Das, Rajat Bindlish, Julian Chaubell, Seung-Bum Kim, Qing Liu, Peggy E. O'Neill, Roy Scott Dunbar, Land B. Dang, John S. Kimball, Thomas J. Jackson, Hala Khalid AlJassar, Jun Asanuma, Bimal K. Bhattacharya, Aaron A. Berg, David D. Bosch, Laura L. Bourgeau-Chavez, Todd Caldwell, Jean-Christophe Calvet, Chandra D. Holifield Collins, Karsten H. Jensen, Stanley Livingston, Ernesto López-Baeza, José Martínez-Fernández, Heather McNairn, Mahta Moghaddam, Carsten Montzka, Claudia Notarnicola, Thierry Pellarin, Isabella Greimeister-Pfeil, Jouni Pulliainen, Judith Gpe. Ramos, Mark S. Seyfried, Patrick J. Starks, Zhongbo Su, Rogier van der Velde, Yijian Zeng, Marc Thibeault, Mariette Vreugdenhil, Jeffrey P. Walker, Mehrez Zribi, Dara Entekhabi, Simon H. Yueh

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2022

Regularized Dual-Channel Algorithm for the Retrieval of Soil Moisture and Vegetation Optical Depth From SMAP Measurements.

Julian Chaubell, Simon Yueh, Roy Scott Dunbar, Andreas Colliander, Dara Entekhabi, Steven Chan, Fan Chen, Xiaolan Xu, Rajat Bindlish, Peggy O'Neill, Jun Asanuma, Aaron A. Berg, David D. Bosch, Todd Caldwell, Michael H. Cosh, Chandra D. Holifield Collins, Karsten H. Jensen, José Martínez-Fernández, Mark S. Seyfried, Patrick J. Starks, Zhongbo Su, Marc Thibeault, Jeffrey P. Walker

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2022

Assimilation of Wheat and Soil States into the APSIM-Wheat Crop Model: A Case Study.

Yuxi Zhang, Jeffrey P. Walker, Valentijn R. N. Pauwels, Yuval Sadeh

Remote. Sens., 2022

Local Scale (3-m) Soil Moisture Mapping Using SMAP and Planet SuperDove.

Jinyang Du, John S. Kimball, Rajat Bindlish, Jeffrey P. Walker, Jennifer D. Watts

Remote. Sens., 2022

GNSS-R Soil Moisture Retrieval for Flat Vegetated Surfaces Using a Physics-Based Bistatic Scattering Model and Hybrid Global/Local Optimization.

Amir Azemati, Amer Melebari, James D. Campbell, Jeffrey P. Walker, Mahta Moghaddam

Remote. Sens., 2022

Environmental Effects on Brightness Temperature Observation From an L-Band Radiometer.

Thi Mai Nguyen, Jeffrey P. Walker, Nan Ye, Jayantha Kodikara

IEEE Geosci. Remote. Sens. Lett., 2022

Vegetation Canopy Height Retrieval Using L1 and L5 Airborne GNSS-R.

Joan Francesc Muñoz-Martín, Daniel Pascual, Raul Onrubia, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

IEEE Geosci. Remote. Sens. Lett., 2022

Root Zone Soil Moisture Profile Retrieval Using Combined L-Band and P-Band Radiometry.

Foad Brakhasi, Jeffrey P. Walker, Nan Ye, Xiaoling Wu, Xiaoji Shen, In-Young Yeo, Nithyapriya Boopathi

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2022

2021

The Soil Moisture Active Passive Experiments: Validation of the SMAP Products in Australia.

Nan Ye, Jeffrey P. Walker, Xiaoling Wu, Richard de Jeu, Ying Gao, Thomas J. Jackson, François Jonard, Edward Kim, Olivier Merlin, Valentijn R. N. Pauwels, Luigi J. Renzullo, Christoph Rüdiger, Sabah Sabaghy, Christian von Hebel, Simon H. Yueh, Liujun Zhu

IEEE Trans. Geosci. Remote. Sens., 2021

Soil Moisture Retrieval Depth of P- and L-Band Radiometry: Predictions and Observations.

Xiaoji Shen, Jeffrey P. Walker, Nan Ye, Xiaoling Wu, Nithyapriya Boopathi, In-Young Yeo, Linlin Zhang, Liujun Zhu

IEEE Trans. Geosci. Remote. Sens., 2021

Microwave Radiometry at Frequencies From 500 to 1400 MHz: An Emerging Technology for Earth Observations.

Joel T. Johnson, Kenneth C. Jezek, Giovanni Macelloni, Marco Brogioni, Leung Tsang, Emmanuel P. Dinnat, Jeffrey P. Walker, Nan Ye, Sidharth Misra, Jeffrey R. Piepmeier, Rajat Bindlish, David M. Le Vine, Peggy E. O'Neill, Lars Kaleschke, Mark J. Andrews, Caglar Yardim, Mustafa Aksoy, Michael Durand, Chi-Chih Chen, Oguz Demir, Alexandra Bringer, Julie Z. Miller, Shannon T. Brown, Ron Kwok, Tong Lee, Yann Kerr, Dara Entekhabi, Jinzheng Peng, Andreas Colliander, Steven Chan, Joseph A. MacGregor, Brooke Medley, Roger DeRoo, Mark Drinkwater

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021

Improved GNSS-R Altimetry Methods: Theory and Experimental Demonstration Using Airborne Dual Frequency Data from the Microwave Interferometric Reflectometer (MIR).

Oriol Cervelló i Nogues, Joan Francesc Muñoz-Martín, Hyuk Park, Adriano Camps, Raul Onrubia, Daniel Pascual, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Remote. Sens., 2021

Single-Pass Soil Moisture Retrieval Using GNSS-R at L1 and L5 Bands: Results from Airborne Experiment.

Joan Francesc Muñoz-Martín, Raul Onrubia, Daniel Pascual, Hyuk Park, Miriam Pablos, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Remote. Sens., 2021

Toward P-Band Passive Microwave Sensing of Soil Moisture.

Nan Ye, Jeffrey P. Walker, In-Young Yeo, Thomas J. Jackson, Yann Kerr, Edward Kim, Andrew McGrath, Ivan Popstefanija, Mark A. Goodberlet, James Hills

IEEE Geosci. Remote. Sens. Lett., 2021

Fusion of Sentinel-2 and PlanetScope time-series data into daily 3 m surface reflectance and wheat LAI monitoring.

Yuval Sadeh, Xuan Zhu, David Dunkerley, Jeffrey P. Walker, Yuxi Zhang, Offer Rozenstein, V. S. Manivasagam, Karine Chenu

Int. J. Appl. Earth Obs. Geoinformation, 2021

Leaf water content estimation using top-of-canopy airborne hyperspectral data.

Rahul Raj, Jeffrey P. Walker, Vishal Vinod, Rohit Pingale, Balaji Naik, Jagarlapudi Adinarayana

Int. J. Appl. Earth Obs. Geoinformation, 2021

Leaf area index estimation using top-of-canopy airborne RGB images.

Rahul Raj, Jeffrey P. Walker, Rohit Pingale, Rohit Nandan, Balaji Naik, Jagarlapudi Adinarayana

Int. J. Appl. Earth Obs. Geoinformation, 2021

Leaf nitrogen content estimation using top-of-canopy airborne hyperspectral data.

Rahul Raj, Jeffrey P. Walker, Rohit Pingale, Balaji Naik Banoth, Jagarlapudi Adinarayana

Int. J. Appl. Earth Obs. Geoinformation, 2021

Parameter Considerations for the Retrieval of Surface Soil Moisture from Spaceborne GNSS-R.

Joan Francesc Muñoz-Martín, Raul Onrubia, Daniel Pascual, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2021

2020

Improved SMAP Dual-Channel Algorithm for the Retrieval of Soil Moisture.

Mario Julian Chaubell, Simon H. Yueh, Roy Scott Dunbar, Andreas Colliander, Fan Chen, Steven Tsz K. Chan, Dara Entekhabi, Rajat Bindlish, Peggy E. O'Neill, Jun Asanuma, Aaron A. Berg, David D. Bosch, Todd Caldwell, Michael H. Cosh, Chandra D. Holifield Collins, José Martínez-Fernández, Mark S. Seyfried, Patrick J. Starks, Zhongbo Su, Marc Thibeault, Jeffrey P. Walker

IEEE Trans. Geosci. Remote. Sens., 2020

Identification of Agricultural Row Features Using Optical Data for Scattering and Reflectance Modeling Over Periodic Surfaces.

Liujun Zhu, Jeffrey P. Walker, Christoph Rüdiger, Pengfeng Xiao

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2020

Experimental Evidence of Swell Signatures in Airborne L5/E5a GNSS-Reflectometry.

Joan Francesc Muñoz-Martín, Raul Onrubia, Daniel Pascual, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Remote. Sens., 2020

Untangling the Incoherent and Coherent Scattering Components in GNSS-R and Novel Applications.

Joan Francesc Muñoz-Martín, Raul Onrubia, Daniel Pascual, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Remote. Sens., 2020

Sentinel-2 and Planetscope Data Fusion into Daily 3 M Images for Leaf Area Index Monitoring.

Yuval Sadeh, Xuan Zhu, David Dunkerley, Jeffrey P. Walker, Yuxi Zhang, Offer Rozenstein, V. S. Manivasagam, Karine Chenu

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2020

Untangling the GNSS-R Coherent and Incoherent Components: Experimental Evidences Over the Ocean.

Joan Francesc Muñoz-Martín, Raul Onrubia, Daniel Pascual, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2020

First Experimental Evidence of Wind and Swell Signatures in L5 GPS and E5A Galileo GNSS-R Waveforms.

Joan Francesc Muñoz-Martín, Raul Onrubia, Daniel Pascual, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2020

Preliminary Model for Soil Moisture Retrieval Using P-Band Radiometer Observations.

Nithyapriya Boopathi, Nan Ye, Xiaoling Wu, Jeffrey P. Walker, Xiaoji Shen, Y. S. Rao, Thomas J. Jackson, Yann Kerr, Edward Kim, Andrew McGrath, In-Young Yeo

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2020

2019

Impact of Urban Cover Fraction on SMOS and SMAP Surface Soil Moisture Retrieval Accuracy.

Nan Ye, Jeffrey P. Walker, Christoph Rüdiger, Dongryeol Ryu, Robert J. Gurney

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2019

Satellite Cross-Talk Impact Analysis in Airborne Interferometric Global Navigation Satellite System-Reflectometry with the Microwave Interferometric Reflectometer.

Raul Onrubia, Daniel Pascual, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker, Alessandra Monerris

Remote. Sens., 2019

River reconstruction using a conformal mapping method.

James E. Hilton, Stefania Grimaldi, Raymond C. Z. Cohen, Nikhil Garg, Yuan Li, Steve P. Marvanek, Valentijn R. N. Pauwels, Jeffrey P. Walker

Environ. Model. Softw., 2019

Multi-Platform Radiometer Systems for Surface Soil Moisture Retrieval.

Xiaoling Wu, Nan Ye, Jeffrey P. Walker, James Hills, François Jonard, Valentijn R. N. Pauwels

Proceedings of the 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019

Impact of Window Size in Remote Sensing Based Glacier Feature Tracking - a Study on Chhota Shigri Glacier, Western Himalayas, India.

Sangita Kumari, R. Ramsankaran, Jeffrey P. Walker

Proceedings of the 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019

Seasonal Dependence of SMAP Radiometer-Based Soil Moisture Performance as Observed Over Core Validation Sites.

Andreas Colliander, Heather McNairn, Marc Thibeault, José Martínez-Fernández, Karsten H. Jensen, Jun Asanuma, Mark S. Seyfried, David D. Bosch, Patrick J. Starks, Chandra D. Holifield Collins, John H. Prueger, Thomas J. Jackson, Zhongbo Su, Simon H. Yueh, Steven Tsz K. Chan, Peggy O'Neill, Rajat Bindlish, Michael H. Cosh, Todd Caldwell, Jeffrey P. Walker, Aaron A. Berg

Proceedings of the 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019

2018

Analysis of Data Acquisition Time on Soil Moisture Retrieval From Multiangle L-Band Observations.

Sandy Peischl, Jeffrey P. Walker, Dongryeol Ryu, Yann H. Kerr

IEEE Trans. Geosci. Remote. Sens., 2018

Investigation of SMAP Active-Passive Downscaling Algorithms Using Combined Sentinel-1 SAR and SMAP Radiometer Data.

Lian He, Yang Hong, Xiaoling Wu, Nan Ye, Jeffrey P. Walker, Xiaona Chen

IEEE Trans. Geosci. Remote. Sens., 2018

The Polarimetric L-Band Imaging Synthetic Aperture Radar (PLIS): Description, Calibration, and Cross-Validation.

Liujun Zhu, Jeffrey P. Walker, Nan Ye, Christoph Rüdiger, Jörg M. Hacker, Rocco Panciera, Mihai A. Tanase, Xiaoling Wu, Douglas A. Gray, Nick J. S. Stacy, Alvin S. Goh, Heath Yardley, Jim Mead

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2018

Evaluation of the Tau-Omega Model for Passive Microwave Soil Moisture Retrieval Using SMAPEx Datasets.

Ying Gao, Jeffrey P. Walker, Nan Ye, Rocco Panciera, Alessandra Monerris, Dongryeol Ryu, Christoph Rüdiger, Thomas J. Jackson

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2018

GCOM-W AMSR2 Soil Moisture Product Validation Using Core Validation Sites.

Rajat Bindlish, Michael H. Cosh, Thomas J. Jackson, Toshio Koike, Hideyuki Fujii, Steven Tsz K. Chan, Jun Asanuma, Aaron Berg, David D. Bosch, Todd Caldwell, Chandra D. Holifield Collins, Heather McNairn, José Martínez-Fernández, John H. Prueger, Tracy L. Rowlandson, Mark S. Seyfried, Patrick J. Starks, Marc Thibeault, Rogier van der Velde, Jeffrey P. Walker, Evan J. Coopersmith

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2018

SMOS and SMAP Brightness Temperature Assimilation Over the Murrumbidgee Basin.

Dominik Rains, Gabrielle J. M. De Lannoy, Hans Lievens, Jeffrey P. Walker, Niko E. C. Verhoest

IEEE Geosci. Remote. Sens. Lett., 2018

Soil Moisture Retrieval over Agricultural Fields from Time Series Multi-Angular L-Band Radar Data.

Liujun Zhu, Jeffrey P. Walker, Leung Tsang, Huanting Huang, Nan Ye, Christoph Rüdiger

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

Towards Multi-Frequency Soil Moisture Retrieval Using P- and L-Band Passive Microwave Sensing Technology.

Nan Ye, Xiaoling Wu, Jeffrey P. Walker, Nithyapriya Boopathi, Thomas J. Jackson, Yann Kerr, Edward Kim, Andrew McGrath, In-Young Yeo, Mahta Moghaddam

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

Preliminary End- to-End Results of the MIR Instrument: the Microwave Interferometric Reflectometer.

Raul Onrubia, Daniel Pascual, Jorge Querol, Hyuk Park, Adriano Camps, Christoph Rüdiger, Jeffrey P. Walker

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

Sentinel-1 & Sentinel-2 for SOIL Moisture Retrieval at Field Scale.

Francesco Mattia, Anna Balenzano, Giuseppe Satalino, Francesco P. Lovergine, Jian Peng, Urs Wegmüller, Oliver Cartus, Malcolm W. J. Davidson, Seung-Bum Kim, Joel T. Johnson, Jeffrey P. Walker, Xiaoling Wu, Valentijn R. N. Pauwels, Heather McNairn, Thomas Caldwell, Michael H. Cosh, Thomas J. Jackson

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

L-, C- and X-Band Passive Microwave Soil Moisture Retrieval Algorithm Parameterization Using in Situ Validation Sites.

Ying Gao, Andreas Colliander, Mariko S. Burgin, Jeffrey P. Walker, Chun-Sik Chae, Emmanuel P. Dinnat, Michael H. Cosh, Todd Caldwell, Aaron Berg, José Martínez-Fernández

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

High Resolution Soil Moisture Product Based on Smap Active-Passive Approach Using Copernicus Sentinel 1 Data.

Narendra N. Das, Dara Entekhabi, Seung-Bum Kim, Thomas Jagdhuber, Roy Scott Dunbar, Simon Yueh, Peggy E. O'Neill, Andreas Colliander, Jeffrey P. Walker, Thomas J. Jackson

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

Towards Soil Moisture Retrieval Using Tower-Based P-Band Radiometer Observations.

Nithyapriya Boopathi, Nan Ye, Xiaoling Wu, Jeffrey P. Walker, Y. S. Rao, Thomas J. Jackson, Yann Kerr, Edward Kim, Andrew McGrath, In-Young Yeo

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

2017

Medium-Resolution Soil Moisture Retrieval Using the Bayesian Merging Method.

Xiaoling Wu, Jeffrey P. Walker, Christoph Rüdiger, Rocco Panciera, Ying Gao

IEEE Trans. Geosci. Remote. Sens., 2017

Fusing Microwave and Optical Satellite Observations to Simultaneously Retrieve Surface Soil Moisture, Vegetation Water Content, and Surface Soil Roughness.

Yohei Sawada, Toshio Koike, Kentaro Aida, Kinya Toride, Jeffrey P. Walker

IEEE Trans. Geosci. Remote. Sens., 2017

A Time-Series Approach to Estimating Soil Moisture From Vegetated Surfaces Using L-Band Radar Backscatter.

Jeffrey D. Ouellette, Joel T. Johnson, Anna Balenzano, Francesco Mattia, Giuseppe Satalino, Seung-Bum Kim, Roy Scott Dunbar, Andreas Colliander, Michael H. Cosh, Todd G. Caldwell, Jeffrey P. Walker, Aaron A. Berg

IEEE Trans. Geosci. Remote. Sens., 2017

Surface Soil Moisture Retrieval Using the L-Band Synthetic Aperture Radar Onboard the Soil Moisture Active-Passive Satellite and Evaluation at Core Validation Sites.

Seung-Bum Kim, Jakob J. van Zyl, Joel T. Johnson, Mahta Moghaddam, Leung Tsang, Andreas Colliander, Roy Scott Dunbar, Thomas J. Jackson, Sermsak Jaruwatanadilok, Richard D. West, Aaron Berg, Todd Caldwell, Michael H. Cosh, David C. Goodrich, Stanley Livingston, Ernesto López-Baeza, Tracy L. Rowlandson, Marc Thibeault, Jeffrey P. Walker, Dara Entekhabi, Eni G. Njoku, Peggy E. O'Neill, Simon H. Yueh

IEEE Trans. Geosci. Remote. Sens., 2017

Intercomparison of Alternate Soil Moisture Downscaling Algorithms Using Active-Passive Microwave Observations.

Xiaoling Wu, Jeffrey P. Walker, Christoph Rüdiger, Rocco Panciera, Ying Gao

IEEE Geosci. Remote. Sens. Lett., 2017

An Extension of the Alpha Approximation Method for Soil Moisture Estimation Using Time-Series SAR Data Over Bare Soil Surfaces.

Lian He, Qiming Qin, Rocco Panciera, Mihai A. Tanase, Jeffrey P. Walker, Yang Hong

IEEE Geosci. Remote. Sens. Lett., 2017

Fusing microwave and optical satellite observations for high resolution soil moisture data products.

Xiwu Zhan, Li Fang, Jicheng Liu, Christopher Hain, Jifu Yin, Mitchell Schull, Michael H. Cosh, Jun Wen, Tarendra Lakhankar, Kun Yang, Jeffrey P. Walker

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Comparison of downscaling techniques for high resolution soil moisture mapping.

Sabah Sabaghy, Jeffrey P. Walker, Luigi J. Renzullo, Ruzbeh Akbar, Steven Tsz K. Chan, Julian Chaubell, Narendra N. Das, Roy Scott Dunbar, Dara Entekhabi, Anouk Gevaert, Thomas J. Jackson, Olivier Merlin, Mahta Moghaddam, Jinzheng Peng, Jeffrey Piepmeier, Maria Piles, Gerard Portal, Christoph Rüdiger, Vivien Stefan, Xiaoling Wu, Nan Ye, Simon Yueh

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Assessment of version 4 of the SMAP passive soil moisture standard product.

Peggy O'Neill, Steven Tsz K. Chan, Rajat Bindlish, Thomas J. Jackson, Andreas Colliander, Roy Scott Dunbar, Fan Chen, Jeffrey Piepmeier, Simon Yueh, Dara Entekhabi, Michael H. Cosh, Todd Caldwell, Jeffrey P. Walker, Xiaoling Wu, Aaron A. Berg, Tracy L. Rowlandson, Anna Pacheco, Heather McNairn, Marc Thibeault, José Martínez-Fernández, A. Gonzalez-Zamora, Ernesto López-Baeza, Frederik Uldall, Mark S. Seyfried, David D. Bosch, Patrick J. Starks, Chandra D. Holifield Collins, John H. Prueger, Zhongbo Su, Rogier van der Velde, Jun Asanuma, Michael A. Palecki, Eric E. Small, Marek Zreda, Jean-Christophe Calvet, Wade T. Crow, Yann Kerr

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Evaporation-based disaggregation of surface soil moisture data: The dispatch method, the CATDS product and on-going research.

Olivier Merlin, Luis Enrique Olivera-Guerra, Bouchra Ait Hssaine, Abdelhakim Amazirh, Yoann Malbéteau, Vivien Stefan, Beatriz Molero, Zoubair Rafi, Maria José Escorihuela, Jamal Ezzahar, Saïd Khabba, Jeffrey P. Walker, Yann Kerr, Vincent Simonneaux, Salah Er-Raki

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Sentinel-1 high resolution soil moisture.

Francesco Mattia, Anna Balenzano, Giuseppe Satalino, Francesco P. Lovergine, Alexander Loew, Jian Peng, Urs Wegmüller, Maurizio Santoro, Oliver Cartus, Katarzyna Dabrowska-Zielinska, Jan Pawel Musial, Malcolm W. J. Davidson, Simon Yueh, Seung-Bum Kim, Narendra N. Das, Andreas Colliander, Joel T. Johnson, Jeffrey Ouellette, Jeffrey P. Walker, Xiaoling Wu, Heather McNairn, Amine Merzouki, Jarrett Powers, Todd Caldwell, Dara Entekhabi, Michael H. Cosh, Thomas J. Jackson

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Multi-frequency radiometer-based soil moisture retrieval algorithm parametrization using in situ validation sites.

Ying Gao, Andreas Colliander, Mariko S. Burgin, Jeffrey P. Walker, Chun-Sik Chae, Emmanuel P. Dinnat, Michael H. Cosh

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Optimized glcm-based texture features for improved SAR-based flood mapping.

Antara Dasgupta, Stefania Grimaldi, R. Ramsankaran, Jeffrey P. Walker

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Development and validation of the SMAP enhanced passive soil moisture product.

Steven Tsz K. Chan, Rajat Bindlish, Peggy O'Neill, Thomas J. Jackson, Julian Chaubell, Jeffrey Piepmeier, Roy Scott Dunbar, Andreas Colliander, Fan Chen, Dara Entekhabi, Simon Yueh, Michael H. Cosh, Todd Caldwell, Jeffrey P. Walker, Xiaoling Wu, Aaron A. Berg, Tracy L. Rowlandson, Anna Pacheco, Heather McNairn, Marc Thibeault, José Martínez-Fernández, Angel Gonzalez-Zamora, Ernesto López-Baeza, Frederik Uldall, Mark S. Seyfried, David D. Bosch, Patrick J. Starks, Chandra D. Holifield Collins, John H. Prueger, Zhongbo Su, Rogier van der Velde, Jun Asanuma, Michael A. Palecki, Eric E. Small, Marek Zreda, Jean-Christophe Calvet, Wade T. Crow, Yann Kerr

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

AMSR2 soil moisture product validation.

Rajat Bindlish, Thomas J. Jackson, Michael H. Cosh, Toshio Koike, X. Fuiji, Richard de Jeu, Steven Tsz K. Chan, Jun Asanuma, Aaron A. Berg, David D. Bosch, Todd Caldwell, C. Holyfield Collins, Heather McNairn, José Martínez-Fernández, John H. Prueger, Mark S. Seyfried, Patrick J. Starks, Zhongbo Su, Marc Thibeault, Jeffrey P. Walker

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

2016

Estimation of Vegetation Water Content From the Radar Vegetation Index at L-Band.

Yuancheng Huang, Jeffrey P. Walker, Ying Gao, Xiaoling Wu, Alessandra Monerris

IEEE Trans. Geosci. Remote. Sens., 2016

Soil Moisture Retrieval in Agricultural Fields Using Adaptive Model-Based Polarimetric Decomposition of SAR Data.

Lian He, Rocco Panciera, Mihai A. Tanase, Jeffrey P. Walker, Qiming Qin

IEEE Trans. Geosci. Remote. Sens., 2016

CHP Toolkit: Case Study of LAIe Sensitivity to Discontinuity of Canopy Cover in Fruit Plantations.

Karolina D. Fieber, Ian J. Davenport, James M. Ferryman, Robert J. Gurney, Victor M. Becerra, Jeffrey P. Walker, Jörg M. Hacker

IEEE Trans. Geosci. Remote. Sens., 2016

Assessment of the SMAP Passive Soil Moisture Product.

Steven Tsz K. Chan, Rajat Bindlish, Peggy E. O'Neill, Eni G. Njoku, Thomas J. Jackson, Andreas Colliander, Fan Chen, Mariko Burgin, Roy Scott Dunbar, Jeffrey Piepmeier, Simon Yueh, Dara Entekhabi, Michael H. Cosh, Todd Caldwell, Jeffrey P. Walker, Xiaoling Wu, Aaron A. Berg, Tracy L. Rowlandson, Anna Pacheco, Heather McNairn, Marc Thibeault, José Martínez-Fernández, Angel Gonzalez-Zamora, Mark S. Seyfried, David D. Bosch, Patrick J. Starks, David C. Goodrich, John H. Prueger, Michael A. Palecki, Eric E. Small, Marek Zreda, Jean-Christophe Calvet, Wade T. Crow, Yann Kerr

IEEE Trans. Geosci. Remote. Sens., 2016

On the Correlation Between GNSS-R Reflectivity and L-Band Microwave Radiometry.

Alberto Alonso Arroyo, Adriano Camps, Alessandra Monerris, Christoph Rüdiger, Jeffrey P. Walker, Raul Onrubia, Jorge Querol, Hyuk Park, Daniel Pascual

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2016

Application of Remote Sensing Data to Constrain Operational Rainfall-Driven Flood Forecasting: A Review.

Yuan Li, Stefania Grimaldi, Jeffrey P. Walker, Valentijn R. N. Pauwels

Remote. Sens., 2016

How Universal Is the Relationship between Remotely Sensed Vegetation Indices and Crop Leaf Area Index? A Global Assessment.

Yanghui Kang, Mutlu Özdogan, Samuel C. Zipper, Miguel O. Roman, Jeffrey P. Walker, Suk Young Hong, Michael T. Marshall, Vincenzo Magliulo, José F. Moreno, Luis Alonso, Akira Miyata, Bruce Kimball, Steven P. Loheide II

Remote. Sens., 2016

Towards validation of SMAP: SMAPEX-4 & -5.

Nan Ye, Jeffrey P. Walker, Xiaoling Wu, Thomas J. Jackson, Luigi J. Renzullo, Olivier Merlin, Christoph Rüdiger, Dara Entekhabi, Richard de Jeu, Edward Kim

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

Evaluation of the validated Soil Moisture product from the SMAP radiometer.

Peggy E. O'Neill, Steven Tsz K. Chan, Andreas Colliander, Roy Scott Dunbar, Eni G. Njoku, Rajat Bindlish, Fan Chen, Thomas J. Jackson, Mariko Burgin, Jeffrey Piepmeier, Simon Yueh, Dara Entekhabi, Michael H. Cosh, Todd Caldwell, Jeffrey P. Walker, Xiaoling Wu, Aaron A. Berg, Tracy L. Rowlandson, Anna Pacheco, Heather McNairn, Marc Thibeault, José Martínez-Fernández, Angel Gonzalez-Zamora, Mark S. Seyfried, David D. Bosch, Patrick J. Starks, David C. Goodrich, John H. Prueger, Michael A. Palecki, Eric E. Small, Marek Zreda, Jean-Christophe Calvet, Wade T. Crow, Yann Kerr

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

Surface soil moisture retrieval using L-band SMAP SAR data and its validation.

Seung-Bum Kim, Jakob J. van Zyl, Joel T. Johnson, Mahta Moghaddam, Leung Tsang, Andreas Colliander, Roy Scott Dunbar, Thomas J. Jackson, Sermsak Jaruwatanadilok, Richard D. West, Aaron A. Berg, Todd Caldwell, Michael H. Cosh, Ernesto López-Baeza, Marc Thibeault, Jeffrey P. Walker, Dara Entekhabi, Simon Yueh

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

Satellite-based soil moisture validation and field experiments; skylab to smap.

Thomas J. Jackson, Jean-Pierre Wigneron, Yann Kerr, Michael H. Cosh, Andreas Colliander, Jeffrey P. Walker, Rajat Bindlish

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

Development and validation of the GCOM-W AMSR2 soil moisture product.

Rajat Bindlish, Thomas J. Jackson, Michael H. Cosh, Sushil Milak, Eni G. Njoku, Steven Tsz K. Chan, Mariko Burgin, Todd Caldwell, Aaron A. Berg, Heather McNairn, Jeffrey P. Walker, Yijian Zeng, Zhongbo Su, Marc Thibeault, Justino Martínez

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

2015

A Cumulative Distribution Function Method for Normalizing Variable-Angle Microwave Observations.

Nan Ye, Jeffrey P. Walker, Christoph Rüdiger

IEEE Trans. Geosci. Remote. Sens., 2015

Simulation of the SMAP Data Stream From SMAPEx Field Campaigns in Australia.

Xiaoling Wu, Jeffrey P. Walker, Christoph Rüdiger, Rocco Panciera, Douglas A. Gray

IEEE Trans. Geosci. Remote. Sens., 2015

Copula-Based Downscaling of Coarse-Scale Soil Moisture Observations With Implicit Bias Correction.

Niko E. C. Verhoest, Martinus Johannes van den Berg, Brecht Martens, Hans Lievens, Eric F. Wood, Ming Pan, Yann H. Kerr, Ahmad Al Bitar, Sat Kumar Tomer, Matthias Drusch, Hilde Vernieuwe, Bernard De Baets, Jeffrey P. Walker, Gift Dumedah, Valentijn R. N. Pauwels

IEEE Trans. Geosci. Remote. Sens., 2015

Optical Sensing of Vegetation Water Content: A Synthesis Study.

Ying Gao, Jeffrey P. Walker, Mahdi Allahmoradi, Alessandra Monerris, Dongryeol Ryu, Thomas J. Jackson

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2015

Mapping Flooded Rice Paddies Using Time Series of MODIS Imagery in the Krishna River Basin, India.

Pardhasaradhi Teluguntla, Dongryeol Ryu, Biju George, Jeffrey P. Walker, Hector M. Malano

Remote. Sens., 2015

Effect of Land-Cover Type on the SMAP Active/Passive Soil Moisture Downscaling Algorithm Performance.

Xiaoling Wu, Jeffrey P. Walker, Christoph Rüdiger, Rocco Panciera

IEEE Geosci. Remote. Sens. Lett., 2015

2014

Sensitivity of L-Band Radar Backscatter to Forest Biomass in Semiarid Environments: A Comparative Analysis of Parametric and Nonparametric Models.

Mihai A. Tanase, Rocco Panciera, Kim Lowell, Siyuan Tian, Alberto García-Martín, Jeffrey P. Walker

IEEE Trans. Geosci. Remote. Sens., 2014

Toward Vicarious Calibration of Microwave Remote-Sensing Satellites in Arid Environments.

Christoph Rüdiger, Jeffrey P. Walker, Yann H. Kerr, Edward J. Kim, Jörg M. Hacker, Robert J. Gurney, Damian J. Barrett, John Le Marshall

IEEE Trans. Geosci. Remote. Sens., 2014

The Soil Moisture Active Passive Experiments (SMAPEx): Toward Soil Moisture Retrieval From the SMAP Mission.

Rocco Panciera, Jeffrey P. Walker, Thomas J. Jackson, Douglas A. Gray, Mihai A. Tanase, Dongryeol Ryu, Alessandra Monerris, Heath Yardley, Christoph Rüdiger, Xiaoling Wu, Ying Gao, Jörg M. Hacker

IEEE Trans. Geosci. Remote. Sens., 2014

Evaluation of IEM, Dubois, and Oh Radar Backscatter Models Using Airborne L-Band SAR.

Rocco Panciera, Mihai A. Tanase, Kim Lowell, Jeffrey P. Walker

IEEE Trans. Geosci. Remote. Sens., 2014

Can SMOS Data be Used Directly on the 15-km Discrete Global Grid?

Gift Dumedah, Jeffrey P. Walker, Christoph Rüdiger

IEEE Trans. Geosci. Remote. Sens., 2014

Foreword to the Special Issue on the 2013 IEEE International Geoscience and Remote Sensing Symposium.

Clive S. Fraser, Jeffrey P. Walker, Mark L. Williams

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2014

Dual-Polarization GNSS-R Interference Pattern Technique for Soil Moisture Mapping.

Alberto Alonso Arroyo, Adriano Camps, Albert Aguasca, Giuseppe F. Forte, Alessandra Monerris, Christoph Rüdiger, Jeffrey P. Walker, Hyuk Park, Daniel Pascual, Raul Onrubia

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2014

Forest Biomass Estimation at High Spatial Resolution: Radar Versus Lidar Sensors.

Mihai A. Tanase, Rocco Panciera, Kim Lowell, Cristina Aponte, Jörg M. Hacker, Jeffrey P. Walker

IEEE Geosci. Remote. Sens. Lett., 2014

Similarities Between Spaceborne Active and Airborne Passive Microwave Observations at 1 km Resolution.

Christoph Rüdiger, Marcela Doubková, Joshua R. Larsen, Wolfgang Wagner, Jeffrey P. Walker

IEEE Geosci. Remote. Sens. Lett., 2014

Effective LAI and CHP of a Single Tree From Small-Footprint Full-Waveform LiDAR.

Karolina D. Fieber, Ian J. Davenport, Mihai A. Tanase, James M. Ferryman, Robert J. Gurney, Jeffrey P. Walker, Jörg M. Hacker

IEEE Geosci. Remote. Sens. Lett., 2014

Improving the Accuracy of Soil Moisture Retrievals Using the Phase Difference of the Dual-Polarization GNSS-R Interference Patterns.

Alberto Alonso Arroyo, Adriano Camps, Albert Aguasca, Giuseppe Forte, Alessandra Monerris, Christoph Rüdiger, Jeffrey P. Walker, Hyuk Park, Daniel Pascual, Raul Onrubia

IEEE Geosci. Remote. Sens. Lett., 2014

The dual polarization GNSS-R interference pattern technique.

Alberto Alonso Arroyo, Adriano Camps, Alessandra Monerris, Christoph Rüdiger, Jeffrey P. Walker, Giuseppe Forte, Daniel Pascual, Hyuk Park, Raul Onrubia

Proceedings of the 2014 IEEE Geoscience and Remote Sensing Symposium, 2014

The light airborne reflectometer for GNSS-R observations (LARGO) instrument: Initial results from airborne and Rover field campaigns.

Alberto Alonso Arroyo, Adriano Camps, Alessandra Monerris, Christoph Rüdiger, Jeffrey P. Walker, Giuseppe Forte, Daniel Pascual, Hyuk Park, Raul Onrubia

Proceedings of the 2014 IEEE Geoscience and Remote Sensing Symposium, 2014

2013

Airborne forest monitoring during SMAPEx-3 campaign.

Cristina Vittucci, Leila Guerriero, Paolo Ferrazzoli, Rachid Rahmoune, Mihai A. Tanase, Rocco Panciera, Alessandra Monerris, Christoph Rüdiger, Jeffrey P. Walker

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

Estimation of forest biomass from L-band polarimetric decomposition components.

Mihai A. Tanase, Rocco Panciera, Kim Lowell, Jörg M. Hacker, Jeffrey P. Walker

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

Soil moisture maps from time series of PALSAR-1 scansar data over Australia.

Giuseppe Satalino, Francesco Mattia, Anna Balenzano, Rocco Panciera, Jeffrey P. Walker

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

Sensitivity of TerraSAR-X-band data to surface parameters in bare agricultural areas.

Rocco Panciera, Fiona MacGill, Mihai A. Tanase, Kim Lowell, Jeffrey P. Walker

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

Preliminary leaf area index estimates from airborne small footprint full-waveform LiDAR data.

Karolina D. Fieber, Ian J. Davenport, Mihai A. Tanase, James M. Ferryman, Robert J. Gurney, Jeffrey P. Walker, Jörg M. Hacker

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

2012

Wheat Canopy Structure and Surface Roughness Effects on Multiangle Observations at L-Band.

Sandy Peischl, Jeffrey P. Walker, Dongryeol Ryu, Yann H. Kerr, Rocco Panciera, Christoph Rüdiger

IEEE Trans. Geosci. Remote. Sens., 2012

Disaggregation of SMOS Soil Moisture in Southeastern Australia.

Olivier Merlin, Christoph Rüdiger, Ahmad Al Bitar, Philippe Richaume, Jeffrey P. Walker, Yann H. Kerr

IEEE Trans. Geosci. Remote. Sens., 2012

Multidimensional Disaggregation of Land Surface Temperature Using High-Resolution Red, Near-Infrared, Shortwave-Infrared, and Microwave-L Bands.

Olivier Merlin, Frédéric Jacob, Jean-Pierre Wigneron, Jeffrey P. Walker, Ghani Chehbouni

IEEE Trans. Geosci. Remote. Sens., 2012

Soil Salinity Impacts on L-Band Remote Sensing of Soil Moisture.

Kaighin Alexander McColl, Dongryeol Ryu, Vjekoslav Matic, Jeffrey P. Walker, Justin Costelloe, Christoph Rüdiger

IEEE Geosci. Remote. Sens. Lett., 2012

An airborne simulation of the SMAP data stream.

Jeffrey P. Walker, Peggy O'Neill, Xiaoling Wu, Ying Gao, Alessandra Monerris, Rocco Panciera, Thomas J. Jackson, Douglas A. Gray, Dongryeol Ryu

Proceedings of the 2012 IEEE International Geoscience and Remote Sensing Symposium, 2012

COSMO-SkyMed multi-temporal data for land cover classification and soil moisture retrieval over an agricultural site in Southern Australia.

Giuseppe Satalino, Rocco Panciera, Anna Balenzano, Francesco Mattia, Jeffrey P. Walker

Proceedings of the 2012 IEEE International Geoscience and Remote Sensing Symposium, 2012

2011

Downscaling SMOS-Derived Soil Moisture Using MODIS Visible/Infrared Data.

Maria Piles, Adriano Camps, Mercè Vall-Llossera, Ignasi Corbella, Rocco Panciera, Christoph Rüdiger, Yann H. Kerr, Jeffrey P. Walker

IEEE Trans. Geosci. Remote. Sens., 2011

Sensitivity of Passive Microwave Observations to Soil Moisture and Vegetation Water Content: L-Band to W-Band.

Jean-Christophe Calvet, Jean-Pierre Wigneron, Jeffrey P. Walker, Fatima Karbou, André Chanzy, Clément Albergel

IEEE Trans. Geosci. Remote. Sens., 2011

On the Airborne Spatial Coverage Requirement for Microwave Satellite Validation.

Christoph Rüdiger, Jeffrey P. Walker, Yann H. Kerr

IEEE Geosci. Remote. Sens. Lett., 2011

2010

Validation of the ASAR Global Monitoring Mode Soil Moisture Product Using the NAFE'05 Data Set.

Iliana Mladenova, Venkat Lakshmi, Jeffrey P. Walker, Rocco Panciera, Wolfgang Wagner, Marcela Doubková

IEEE Trans. Geosci. Remote. Sens., 2010

Use of Soil Moisture Variability in Artificial Neural Network Retrieval of Soil Moisture.

Soo-See Chai, Jeffrey P. Walker, Oleg Makarynskyy, Michael Kuhn, Bert Veenendaal, Geoff A. W. West

Remote. Sens., 2010

2009

Using Passive Microwave Response to Soil Moisture Change for Soil Mapping: A Case Study for the Livingstone Creek Catchment.

Gregory K. Summerell, Victor Shoemark, Sandy Grant, Jeffrey P. Walker

IEEE Geosci. Remote. Sens. Lett., 2009

Improved Understanding of Soil Surface Roughness Parameterization for L-Band Passive Microwave Soil Moisture Retrieval.

Rocco Panciera, Jeffrey P. Walker, Olivier Merlin

IEEE Geosci. Remote. Sens. Lett., 2009

An Assessment of QuikSCAT Ku-Band Scatterometer Data for Soil Moisture Sensitivity.

Iliana Mladenova, Venkat Lakshmi, Jeffrey P. Walker, David G. Long, Richard de Jeu

IEEE Geosci. Remote. Sens. Lett., 2009

Assessing the SMOS Soil Moisture Retrieval Parameters With High-Resolution NAFE'06 Data.

Olivier Merlin, Jeffrey P. Walker, Rocco Panciera, Maria José Escorihuela, Thomas J. Jackson

IEEE Geosci. Remote. Sens. Lett., 2009

Parameterization of the Land Parameter Retrieval Model for L-Band Observations Using the NAFE'05 Data Set.

Richard A. M. de Jeu, Thomas R. H. Holmes, Rocco Panciera, Jeffrey P. Walker

IEEE Geosci. Remote. Sens. Lett., 2009

2008

The NAFE'05/CoSMOS Data Set: Toward SMOS Soil Moisture Retrieval, Downscaling, and Assimilation.

Rocco Panciera, Jeffrey P. Walker, Jetse D. Kalma, Edward J. Kim, Jörg M. Hacker, Olivier Merlin, Michael Berger, Niels Skou

IEEE Trans. Geosci. Remote. Sens., 2008

A Simple Method to Disaggregate Passive Microwave-Based Soil Moisture.

Olivier Merlin, Abdelghani G. Chehbouni, Jeffrey P. Walker, Rocco Panciera, Yann Kerr

IEEE Trans. Geosci. Remote. Sens., 2008

Comparison of Microwave and Infrared Land Surface Temperature Products Over the NAFE'06 Research Sites.

Robert M. Parinussa, Richard A. M. de Jeu, Thomas R. H. Holmes, Jeffrey P. Walker

IEEE Geosci. Remote. Sens. Lett., 2008

KU-Band Sensitivity to Soil Moisture. An Evaluation Study for Monitoring Temporal Soil Moisture Change Detection Over the NAFE06 Study Area.

Iliana Mladenova, Venkat Lakshmi, Thomas J. Jackson, Jeffrey P. Walker

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2008

Input Pattern According to Standard Deviation of Backpropagation Neural Network: Influence on Accuracy of Soil Moisture Retrieval.

Soo-See Chai, Bert Veenendaal, Geoff A. W. West, Jeffrey P. Walker

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2008

Explicit Inverse of Soil Moisture Retrieval with an Artificial Neural Network Using Passive Microwave Remote Sensing Data.

Soo-See Chai, Bert Veenendaal, Geoff A. W. West, Jeffrey P. Walker

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2008

2007

The CoSMOS L-band experiment in Southeast Australia.

Kauzar Saleh-Contell, Yann H. Kerr, Gilles Boulet, Philippe Maisongrande, Patricia de Rosnay, Dana Floricioiu, Maria José Escorihuela, Jean-Pierre Wigneron, Aure Cano, Ernesto López-Baeza, Jennifer P. Grant, Jan E. Balling, Niels Skou, Michael Berger, Steven Delwart, Patrick Wursteisen, Rocco Panciera, Jeffrey P. Walker

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2007

2006

A method for retrieving high-resolution surface soil moisture from hydros L-band radiometer and Radar observations.

Xiwu Zhan, Paul R. Houser, Jeffrey P. Walker, Wade T. Crow

IEEE Trans. Geosci. Remote. Sens., 2006

2003

Importance of soil moisture measurements for inferring parameters in hydrologic models of low-yielding ephemeral catchments.

S. A. Wooldridge, Jetse D. Kalma, Jeffrey P. Walker

Environ. Model. Softw., 2003

2001

A methodology for surface soil moisture and vegetation optical depth retrieval using the microwave polarization difference index.

Manfred Owe, Richard de Jeu, Jeffrey P. Walker

IEEE Trans. Geosci. Remote. Sens., 2001