19972020

Research output per year

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Research Output

2016

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

Jackson, T. J., Wigneron, J. P., Kerr, Y., Cosh, M., Colliander, A., Walker, J. & Bindlish, R., 1 Nov 2016, 2016 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 - Proceedings: July 10–15, 2016, Beijing, China. Shi, J., Guo, H. & Chen, K-S. (eds.). Piscataway, NJ: IEEE, Institute of Electrical and Electronics Engineers, p. 3462-3465 4 p. 7729895

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2 Citations (Scopus)

SMAP soil moisture drying more rapid than observed in situ following rainfall events

Shellito, P. J., Small, E. J., Colliander, A., Bindlish, R., Cosh, M. H., Berg, A., Bosch, D. D., Caldwell, T. G., Goodrich, D. C., McNairn, H., Prueger, J. H., Starks, P. J., van der Velde, R. & Walker, J. P., 16 Aug 2016, In : Geophysical Research Letters. 43, 15, p. 8068-8075 8 p.

Research output: Contribution to journalArticleResearchpeer-review

39 Citations (Scopus)

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

He, L., Panciera, R., Tanase, M. A., Walker, J. P. & Qin, Q., 1 Aug 2016, In : IEEE Transactions on Geoscience and Remote Sensing. 54, 8, p. 4445-4460 16 p., 7447759.

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

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

Kim, S., Van Zyl, J. J., Johnson, J., Moghaddam, M., Tsang, L., Colliander, A., Dunbar, S., Jackson, T., Jaruwatanadilok, S., West, R., Berg, A. A., Caldwell, T. G., Cosh, M., Lopez-Baeza, E., Thibeault, M., Walker, J., Entekhabi, D. & Yueh, S., 1 Nov 2016, 2016 IEEE International Geoscience & Remote Sensing Symposium (IGARSS 2016) - Proceedings: July 10–15, 2016, Beijing, China. SHI, J., GUO, H. & CHEN, K. (eds.). IEEE, Institute of Electrical and Electronics Engineers, p. 143-146 4 p. 7729028

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

1 Citation (Scopus)

The effect of radar configuration on effective correlation length

Zhu, L., Walker, J. P., Ye, N. & Rudiger, C., 2 Nov 2016, Proceedings of the 2016 18th International Conference on Electromagnetics in Advanced Applications (ICEAA 2016): Cairns, Australia, 19-23 September 2016 . Piscataway NJ : IEEE, Institute of Electrical and Electronics Engineers, p. 820-823 4 p. 7731525

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

4 Citations (Scopus)

Towards validation of SMAP: SMAPEX-4 & -5

Ye, N., Walker, J., Wu, X., Jackson, T. J., Renzullo, L., Merlin, O., Rudiger, C., Entekhabi, D., Dejeu, R. & Kim, E., 1 Nov 2016, 2016 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 - Proceedings: July 10–15, 2016, Beijing, China. SHI, J., GUO, H. & CHEN, K. (eds.). Piscataway NJ: IEEE, Institute of Electrical and Electronics Engineers, p. 3469-3472 4 p. 7729897

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

7 Citations (Scopus)
2015

A comparison of optical and microwave scintillometers with eddy covariance derived surface heat fluxes

Yee, M. S., Pauwels, V. R. N., Daly, E., Beringer, J., Rudiger, C., McCabe, M. F. & Walker, J. P., 2015, In : Agricultural and Forest Meteorology. 213, p. 226 - 239 14 p.

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

A cumulative distribution function method for normalizing variable-angle microwave observations

Ye, N., Walker, J. P. & Rudiger, C., Jul 2015, In : IEEE Transactions on Geoscience and Remote Sensing. 53, 7, p. 3906-3916 11 p., 7029635.

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

A land data assimilation system for simultaneous simulation of soil moisture and vegetation dynamics

Sawada, Y., Koike, T. & Walker, J., 2015, In : Journal of Geophysical Research: Atmospheres. 120, 12, p. 5910 - 5930 21 p.

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

Assessing near-surface soil moisture assimilation impacts on modeled root-zone moisture for an Australian agricultural landscape

Pipunic, R., Ryu, D. & Walker, J., 2015, Remote Sensing of the Terrestrial Water Cycle. Lakshmi, V., Alsdorf, D., Anderson, M., Biancamaria, S., Cosh, M., Entin, J., Huffman, G., Kustas, W., van Oevelen, P., Painter, T., Parajka, J., Rodell, M. & Rudiger, C. (eds.). 1 ed. Washington DC USA: American Geophysical Union, p. 305 - 317 13 p.

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Researchpeer-review

2 Citations (Scopus)

Copula-based downscaling of coarse-scale soil moisture observations with implicit bias correction

Verhoest, N. EC., van den Berg, M. J., Martens, B., Lievens, H., Wood, E. F., Pan, M., Kerr, Y. H., Al Bitar, A., Tomer, S. K., Drusch, M., Vernieuwe, H., De Baets, B., Walker, J., Dumedah, G. & Pauwels, V. R. N., 2015, In : IEEE Transactions on Geoscience and Remote Sensing. 53, 6, 15 p., 7004843.

Research output: Contribution to journalArticleResearchpeer-review

42 Citations (Scopus)

Determining vertical leakage from the Great Artesian Basin, Australia, through up-scaling field estimates of phreatic evapotranspiration

Costelloe, J. F., Matic, V., Western, A. W., Walker, J. & Tyler, M., 2015, In : Journal of Hydrology. 529, p. 1079 - 1094 16 p.

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Early SMAP soil moisture product validation over Australia using cosmic-ray probes

Monerris, A., McJannet, D., Rüdiger, C., Walker, J. P., Chan, S., Colliander, A., Das, N. N. & Kim, S., 2015, 36th Hydrology and Water Resources Symposium: The Art and Science of Water. North Melbourne VIC Australia: Engineers Australia, p. 567-572 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Effect of land-cover type on the SMAP active/passive soil moisture downscaling algorithm performance

Wu, X., Walker, J., Rudiger, C. & Panciera, R., Apr 2015, In : IEEE Geoscience and Remote Sensing Letters. 12, 4, p. 846 - 850 5 p., 6948317.

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)

Mapping flooded rice paddies using time series of MODIS imagery in the Krishna River Basin, India

Teluguntla, P., Ryu, D., George, B., Walker, J. & Malano, H. M., 13 Jul 2015, In : Remote Sensing. 7, 7, p. 8858 - 8882 25 p.

Research output: Contribution to journalArticleResearchpeer-review

Open Access
16 Citations (Scopus)

Nitrogen loads explain primary productivity in estuaries at the ecosystem scale

Woodland, R. J., Thomson, J. R., Mac Nally, R. C., Reich, P., Evrard, V., Wary, F. Y., Walker, J. & Cook, P., 2015, In : Limnology and Oceanography. 60, 5, p. 1751-1762 12 p.

Research output: Contribution to journalArticleResearchpeer-review

20 Citations (Scopus)

Optical sensing of vegetation water content: A Synthesis Study

Gao, Y., Walker, J., Allahmoradi, M., Monerris-Belda, A., Ryu, D. & Jackson, T. J., Apr 2015, In : IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 8, 4, p. 1456 - 1464 9 p.

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Optimization of a radiative transfer forward operator for simulating SMOS brightness temperatures over the Upper Mississippi Basin

Lievens, H., Al Bitar, A., Verhoest, N. EC., Cabot, F., De Lannoy, G. JM., Drusch, M., Dumedah, G., Hendricks Franssen, H-J., Kerr, Y. H., Tomer, S. K., Martens, B., Merlin, O., Pan, M., van den Berg, M. J., Vereecken, H., Walker, J. P., Wood, E. F. & Pauwels, V. R. N., 2015, In : Journal of Hydrometeorology. 16, 3, p. 1109 - 1134 26 p.

Research output: Contribution to journalArticleResearchpeer-review

19 Citations (Scopus)

Root-zone soil moisture estimation from assimilation of downscaled Soil Moisture and Ocean Salinity data

Dumedah, G., Walker, J. & Merlin, O., 1 Oct 2015, In : Advances in Water Resources. 84, p. 14 - 22 9 p.

Research output: Contribution to journalArticleResearchpeer-review

24 Citations (Scopus)

Simulation of the SMAP data stream from SMAPEx field campaigns in Australia

Wu, X., Walker, J., Rudiger, C., Panciera, R. & Gray, D. A., 2015, In : IEEE Transactions on Geoscience and Remote Sensing. 53, 4, p. 1921 - 1934 14 p.

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

SMOS soil moisture assimilation for improved hydrologic simulation in the Murray Darling Basin, Australia

Lievens, H., Tomer, S. K., Al Bitar, A., De Lannoy, G. J. M., Drusch, M., Dumedah, G., Hendricks Franssen, H-J., Kerr, Y. H., Martens, B., Pan, M., Roundy, J. K., Vereecken, H., Walker, J. P., Wood, E. F., Verhoest, N. EC. & Pauwels, V. R. N., 2015, In : Remote Sensing of Environment. 168, p. 146 - 162 17 p.

Research output: Contribution to journalArticleResearchpeer-review

101 Citations (Scopus)

Soil moisture derivation using triangle method in the lighvan watershed, north western Iran

Rahmati, M., Oskouei, M. M., Neyshabouri, M. R., Walker, J., Fakherifard, A., Ahmadi, A. & Mousavi, S. B., Mar 2015, In : Journal of Soil Science and Plant Nutrition. 15, 1, p. 167 - 178 12 p.

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Standing water effect on soil moisture retrieval from L-band passive microwave observations

Ye, N., Walker, J., Guerschman, J. P., Ryu, D. & Gurney, R. J., 2015, In : Remote Sensing of Environment. 169, p. 232 - 242 11 p.

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Towards operational hydrological model calibration using streamflow and soil moisture measurements

Zhang, Y., Li, Y., Walker, J., Pauwels, V. R. N. & Shahrban, M., 2015, MODSIM2015, 21st International Congress on Modelling and Simulation. Weber, T., McPhee, M. J. & Anderssen, R. S. (eds.). Canberra ACT Australia: Modelling and Simulation Society of Australia and New Zealand (MSSANZ), p. 2089 - 2095 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Towards soil property retrieval from space: an application with disaggregated satellite observations

Bandara, R. S., Walker, J., Rudiger, C. & Merlin, O., 2015, In : Journal of Hydrology. 522, p. 582 - 593 12 p.

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Validation of Canopy Height Profile methodology for small-footprint full-waveform airborne LiDAR data in a discontinuous canopy environment

Fieber, K., Davenport, I., Tanase, M., Ferryman, J., Gurney, R. J., Becerra, V. M., Walker, J. & Hacker, J. M., Jun 2015, In : ISPRS Journal of Photogrammetry and Remote Sensing. 104, p. 144 - 157 14 p.

Research output: Contribution to journalArticleResearchpeer-review

Open Access
File
26 Citations (Scopus)
2014

Airborne multi-temporal L-band polarimetric SAR data for biomass estimation in semi-arid forests

Tanase, M., Panciera, R., Lowell, K., Tian, S., Hacker, J. M. & Walker, J., 2014, In : Remote Sensing of Environment. 145, p. 93 - 104 12 p.

Research output: Contribution to journalArticleResearchpeer-review

39 Citations (Scopus)

Assessing artificial neural networks and statistical methods for infilling missing soil moisture records

Dumedah, G., Walker, J. & Chik, L. C., 2014, In : Journal of Hydrology. 515, p. 330 - 344 15 p.

Research output: Contribution to journalArticleResearchpeer-review

15 Citations (Scopus)

Assessment of land surface model uncertainty: A crucial step towards the identification of model weaknesses

Dumedah, G. & Walker, J., 2014, In : Journal of Hydrology. 519, Part B, p. 1474 - 1484 11 p.

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)

A study of soil moisture estimation from multi-temporal L-band radar observations of vegetated surfaces

Ouellette, J. D., Johnson, J. T., Balenzano, A., Mattia, F., Satalino, G., Kim, S., Walker, J. P. & Panciera, R., 2014, Proceedings of 10th European Conference on Synthetic Aperture Radar (EUSAR 2014): 2-6 June 2014, Berlin, Germany. Krieger, G. (ed.). VDE Verlag, p. 159 - 162 4 p. 6856753

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

Can SMOS data be used directly on the 15-km discrete global grid?

Dumedah, G., Walker, J. & Rudiger, C., 2014, In : IEEE Transactions on Geoscience and Remote Sensing. 52, 5, p. 2538 - 2544 7 p.

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)

Dual-polarization GNSS-R interference pattern technique for soil moisture mapping

Arroyo, A. A., Camps, A., Aguasca, A., Forte, G. F., Monerris-Belda, A., Rudiger, C., Walker, J., Park, H., Pascual, D. & Onrubia, R., 2014, In : IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 7, 5, p. 1533 - 1544 12 p.

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)

Effective LAI and CHP of a single tree from small-footprint full-waveform LiDAR

Fieber, K., Davenport, I., Tanase, M., Ferryman, J., Gurney, R. J., Walker, J. & Hacker, J. M., 2014, In : IEEE Geoscience and Remote Sensing Letters. 11, 9, p. 1634 - 1638 5 p.

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Estimation of soil surface roughness of agricultural soils using airborne LiDAR

Turner, R., Panciera, R., Tanase, M., Lowell, K., Hacker, J. M. & Walker, J., 2014, In : Remote Sensing of Environment. 140, p. 107 - 117 11 p.

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Evaluation of IEM, Dubois, and Oh radar backscatter models using airborne L-Band SAR

Panciera, R., Tanase, M., Lowell, K. & Walker, J., 2014, In : IEEE Transactions on Geoscience and Remote Sensing. 52, 8, p. 4966 - 4979 14 p.

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)

Evaluation of model parameter convergence when using data assimilation for soil moisture estimation

Dumedah, G. & Walker, J., 2014, In : Journal of Hydrometeorology. 15, 1, p. 359 - 375 17 p.

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Evaluation of the SMAP brightness temperature downscaling algorithm using active-passive microwave observations

Wu, X., Walker, J., Das, N., Panciera, R. & Rudiger, C., 2014, In : Remote Sensing of Environment. 155, p. 210 - 221 12 p.

Research output: Contribution to journalArticleResearchpeer-review

23 Citations (Scopus)

Forest biomass estimation at high spatial resolution: Radar versus lidar sensors

Tanase, M., Panciera, R., Lowell, K., Aponte, C., Hacker, J. M. & Walker, J., 2014, In : IEEE Geoscience and Remote Sensing Letters. 11, 3, p. 711 - 715 5 p.

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Foreword to the special issue on the 2013 IEEE International Geoscience and Remote Sensing Symposium

Fraser, C., Walker, J. & Williams, M. L., 1 Sep 2014, In : IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 7, 9, p. 3683-3684 2 p., 2362597.

Research output: Contribution to journalEditorialOtherpeer-review

Improving the accuracy of soil moisture retrievals using the phase difference of the dual-polarization GNSS-R interference patterns

Arroyo, A. A., Camps, A., Aguasca, A., Forte, G. F., Monerris-Belda, A., Rudiger, C., Walker, J., Park, H., Pascual, D. & Onrubia, R., 2014, In : IEEE Geoscience and Remote Sensing Letters. 11, 12, p. 2090 - 2094 5 p.

Research output: Contribution to journalArticleResearchpeer-review

21 Citations (Scopus)

Intercomparison of the JULES and CABLE land surface models through assimilation of remotely sensed soil moisture in southeast Australia

Dumedah, G. & Walker, J., 2014, In : Advances in Water Resources. 74, p. 231 - 244 14 p.

Research output: Contribution to journalArticleResearchpeer-review

15 Citations (Scopus)

Sensitivity of L-band radar backscatter to forest biomass in semiarid environments: A comparative analysis of parametric and nonparametric models

Tanase, M., Panciera, R., Lowell, K., Tian, S., Garcia-Martin, A. & Walker, J., 2014, In : IEEE Transactions on Geoscience and Remote Sensing. 52, 8, p. 4671 - 4685 15 p.

Research output: Contribution to journalArticleResearchpeer-review

19 Citations (Scopus)

Sensitivity of multi-parameter soil moisture retrievals to incidence angle configuration

Peischl, S., Walker, J., Ye, N., Ryu, D. & Kerr, Y. H., 2014, In : Remote Sensing of Environment. 143, p. 64 - 72 9 p.

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Similarities between spaceborne active and airborne passive microwave observations at 1 km resolution

Rudiger, C., Doubkova, M., Larsen, J., Wagner, W. & Walker, J., 2014, In : IEEE Geoscience and Remote Sensing Letters. 11, 12, p. 2178 - 2182 5 p.

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Soil moisture retrieval from airborne PLMR and MODIS products in Zhangye oasis of middle stream of Heihe river basin, China

Li, D., Jin, R., Che, T., Walker, J., Gao, Y., Ye, N. & Wang, S., 2014, In : Advances in Earth Science. 29, 2, p. 295 - 305 11 p.

Research output: Contribution to journalArticleResearchpeer-review

The dual polarization GNSS-R interference pattern technique

Alonso-Arroyo, A., Bernier, M. (ed.), Camps, A., Monerris-Belda, A., Rudiger, C., Walker, J., Forte, G. F., Pascual, D., Park, H. & Onrubia, R., 2014, p. 4058 - 4061. 4 p.

Research output: Contribution to conferenceOther

1 Citation (Scopus)

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

Alonso-Arroyo, A., Camps, A., Monerris-Belda, S., Rudiger, C., Walker, J. P., Forte, G., Pascual, D., Park, H. & Onrubia, R., 4 Nov 2014, 2014 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Proceedings. Lévesque, J., Garneau, J-M. & LeDrew, E. (eds.). Piscataway NJ: IEEE, Institute of Electrical and Electronics Engineers, p. 4054-4057 4 p. 6947376

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

19 Citations (Scopus)

The soil moisture active passive experiments (SMAPEx): Toward soil moisture retrieval from the SMAP mission

Panciera, R., Walker, J., Jackson, T. J., Gray, D. A., Tanase, M., Ryu, D., Monerris-Belda, A., Yardley, H., Rudiger, C., Wu, X., Gao, Y. & Hacker, J. M., 2014, In : IEEE Transactions on Geoscience and Remote Sensing. 52, 1, p. 490 - 507 18 p.

Research output: Contribution to journalArticleResearchpeer-review

100 Citations (Scopus)

Towards soil property retrieval from space: Proof of concept using in situ observations

Bandara, R. S., Walker, J. & Rudiger, C., 2014, In : Journal of Hydrology. 512, p. 27 - 38 12 p.

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Toward vicarious calibration of microwave remote-sensing satellites in arid environments

Rudiger, C., Walker, J., Kerr, Y. H., Kim, E. J., Hacker, J. M., Gurney, R. J., Barrett, D. J. & Le Marshall, J., 2014, In : IEEE Transactions on Geoscience and Remote Sensing. 52, 3, p. 1749 - 1760 12 p.

Research output: Contribution to journalArticleResearchpeer-review

11 Citations (Scopus)