Background

Wouter Verhoef joined the ITC in May 2006 as a part-time (0.3 fte) Professor of Advanced Earth Observation for Water Resources Applications. In November 2009 he was appointed as a 0.5 fte Professor of Quantitative Remote Sensing in Natural Resources and his other professorship in the Water Resources Department was extended to 0.5 fte as well.
As a technical college graduate in physics engineering of HTS Dordrecht, he started his professional career in remote sensing in 1973 at NIWARS in Delft, where he assisted in a research programme aimed at collecting a large number of field spectrometer reflectance measurements of vegetation, soils and water. Also vegetation reflectance modelling became part of his job. In 1977 he moved to the National Aerospace Laboratory NLR, where he continued his work on optical remote sensing of vegetation canopies. He developed the well-known and widely used SAIL canopy reflectance model, as well as several other methodologies and software to process remote sensing data, including data compression and time series analysis (HANTS algorithm) software. In 1998 he obtained his PhD degree in Agriculture and Environmental Sciences at Wageningen University for his modelling work on radiative transfer in vegetation and the atmosphere. He continued working part-time at NLR from 2006 until 2009.

Global vegetation dynamics as pictured by the HANTS algorithm.

His interests and expertise comprise the following topics:

• Radiative transfer modelling for water, soil, vegetation canopies and the atmosphere
• Optical and thermal remote sensing
• Image time series analysis
• Model inversion
• Data assimilation
• Image simulation
• Sensor design, mission preparation and planning
• User interface design, presentation techniques

Activities in education

Several trainees were coached by him at NLR. In 2005, in the frame of the ESA � China DRAGON scientific collaboration programme, he gave twelve lectures on optical remote sensing during two days. In 2006, he participated in the TIGER Capacity Building project of ESA, with lectures given in Cape Town, South Africa. At ITC he contributes to the MSc course programme and to the new edition of the Core Book, supervision of MSC students, and (currently) 6 PhD candidates.

In discussion with Chinese students during DRAGON training course.

Activities in research projects

• Research assistant in NIWARS field spectrometer programme (1973-1977)
• Participant in study towards a national Remote Sensing Data (Reseda) processing facility at NLR
• Participant in study of a Tropical Earth Resources Satellite (TERS)
• Assistant in Hot Spot Reflectometer project
• Participant in several studies of the National Remote Sensing Programme (NRSP), e.g. on atmospheric correction, time series analysis, forest reflectance modelling, canopy fluorescence, etc.
• Prime Investigator of NRSP project on Sugar Beet Yield Forecasting
• Participant in several ESA projects on data compression of remote sensing data
• Co-investigator in NRSP project on Fourier analysis of time series of NOAA-NDVI images (Prime Investigator Dr. Massimo Menenti)
• Prime Investigator of ESA project SASSSIS, the first project dedicated to the Earth Explorer mission that was later called SPECTRA
• Co-investigator in several other ESA studies related to the hyperspectral multi-angular earth observation mission SPECTRA
• Co-investigator in EU-project CROMA (primed by Astrium - Toulouse)
• Co-investigator in EU-project EAGLE (PI José Sobrino)
• Co-investigator in ESA projects GeoBIRD (on data assimilation) and FluorMod (development of a canopy fluorescence model)
• Co-investigator in several ESA studies dedicated to the FLEX (fluorescence experiment) mission
• At ITC the collaborative development of the integrated model SCOPE (soil-canopy observation, photosynthesis and energy balance)

Wouter Verhoef is a member of the Editorial Board of the journal Remote Sensing of Environment and has conducted reviews of manuscripts for the journals:

• Remote Sensing of Environment
• International Journal of Remote Sensing
• Photogrammetric Engineering and Remote Sensing
• Mountain Research and Development
• Physics and Chemistry of the Earth
• International Journal of Applied Earth Observation and Geoinformation
• IEEE Transactions on Geoscience and Remote Sensing
• Agricultural and Forest Meteorology
• International Journal of Thermal Sciences
• Biogeosciences

PhD thesis

"Theory of radiative transfer models applied in optical remote sensing of vegetation canopies" (1998), Wageningen Agricultural University, The Netherlands, 310 pp.

Inaugural address

"A closer look at Remote Sensing", 7th October 2009, Enschede, The Netherlands, ISBN 978-90-6164-277-0

Publications

ISI Journal Articles

Budhiman, S., Salama, M.S., Vekerdy, Z. and Verhoef, W. (2012) Deriving optical properties of Mahakam Delta coastal waters, Indonesia using in situ measurements and ocean color model inversion. In: ISPRS journal of photogrammetry and remote sensing, 68 (2012) pp. 157-169. Full text | Full text

Gökmen, M., Vekerdy, Z., Verhoef, A., Verhoef, W., Batelaan, O. and van der Tol, C. (2012) Integration of soil moisture in SEBS for improving evapotranspiration estimation under water stress conditions. In: Remote sensing of environment, 121 (2012) pp. 261-274. Full text | Full text

Verhoef, W. and Bach, H. (2012) Simulation of Sentinel-3 images by four stream surface atmosphere radiative transfer modeling in the optical and thermal domains. In: Remote sensing of environment, 120 (2012) pp. 197-207. Full text | Full text

Laurent, V.C.E., Verhoef, W. and ... [et al.] (2011) Estimating forest variables from top - of - atmosphere radiance satellite measurements using coupled radiative transfer models. In: Remote sensing of environment, 115 (2011)4 pp. 1043-1052. Full text | Full text

Ambarwulan, W., Salama, M.S., Mannaerts, C.M. and Verhoef, W. (2011) Estimating specific inherent optical properties of tropical coastal waters using bio - optical model inversion and in situ measurements : case of the Berau estuary, East Kalimantan, Indonesia. In: Hydrobiologia : open access, 658(2011)1, pp. 197-211. Full text | Full text

Laurent, V.C.E., Verhoef, W. and ... [et al.] (2011) Inversion of a coupled canopy atmosphere model using multi - angular top - of - atmosphere radiance data : a forest case study. In: Remote sensing of environment, 115 (2011)10 pp. 2603-2612. Full text | Full text

le Maire, G., Marsden, C., Verhoef, W. and ... [et al.] (2011) Leaf area index estimation with MODIS reflectance time series and model inversion during full rotations of Eucalyptus plantations. In: Remote sensing of environment, 115 (2011)2 pp. 586-599. Full text | Full text

Damm, A., Erler, A., Hillen, W., Meroni, M., Schaepman, M.E., Verhoef, W. and Rascher, U. (2011) Modeling the impact of spectral sensor configurations on the FLD retrieval accuracy of sun - induced chlorophyll fluorescence. In: Remote sensing of environment, 115 (2011)8 pp. 1882-1892. Full text | Full text

Mazzoni, M., Falorni, P. and Verhoef, W. (2010) High - resolution methods for fluorescence retrieval from space. In: Optics express, 18(2010)15, pp. 15649-15663. Full text | Full text

Meroni, M., Busetto, L., Colombo, R., Guanter,L., Moreno, J. and Verhoef, W. (2010) Performance of spectral fitting methods for vegetation fluorescence quantification. In: Remote sensing of environment, 114 (2010)2 pp. 363-374. Full text | Full text

Shen, F., Verhoef, W., Yunxuan Zhou, Salama, M.S. and Xiaoli Liu (2010) Satellite estimates of wide - range suspended sediment concentrations in Changjiang, Yangtze estuary using MERIS data. In: Estuaries and coasts, 33(2010)6, pp. 1420-1429. Full text | Full text

Zhao, F., Gu, X., Verhoef, W. and ... [et al.] (2010) A spectral directional reflectance model of row crops. In: Remote sensing of environment, 114 (2010)2 pp. 265-285. Full text | Full text

Shen, F. and Verhoef, W. (2010) Suppression of local haze variations in MERIS images over turbid coastal waters for retrieval of suspended sediment concentration. In: Optics express, 18(2010)12, pp. 12653-12662. Full text | Full text

Timmermans, J., Gieske, A.S.M., van der Tol, C., Verhoef, W. and Su, Z. (2009) Automated directional measurement system for the acquisition of thermal radiative measurements of vegetative canopies. In: Sensors : journal on the science and technology of sensors and biosensors : open access, 9 (2009)3 pp. 1409-1422. Full text | Full text

Salama, M.S., Dekker, A.G., Su, Z., Mannaerts, C.M. and Verhoef, W. (2009) Deriving inherent optical properties and associated inversion - uncertainties in the Dutch lakes. In: Hydrology and earth system sciences (HESS) : open access, 13 (2009)7 pp. 1113-1121. Full text | Full text

van der Tol, C., Verhoef, W., Timmermans, J., Verhoef, A. and Su, Z. (2009) An integrated model of soil - canopy spectral radiances, photosynthesis, fluorescence, temperature and energy balance. In: Biogeosciences, BG : An Interactive Open Access Journal of the European Geosciences Union, 6 (2009)12 pp. 3109-3129. Full text | Full text

van der Tol, C., Verhoef, W. and Rosema, A. (2009) A model for chlorophyll fluorescence and photosynthesis at leaf scale. In: Agricultural and forest meteorology : an international journal, 149 (2009)1 pp. 96-105. Full text | Full text

Jacquemond, S., Verhoef, W. and ... [et al.] (2009) PROSPECT and SAIL models : a review of use for vegetation characterization. In: Remote sensing of environment, 113 (2009)Supplement 1 pp. S56-S66. Full text | Full text

Timmermans, J., Verhoef, W., van der Tol, C. and Su, Z. (2009) Retrieval of canopy component temperatures through Bayesian inversion of directional thermal measurements. In: Hydrology and earth system sciences (HESS) : open access, 13 (2009)7 pp. 1249-1260. Full text | Full text

Kallel, A., Verhoef, W. and ... [et al.] (2008) Canopy bidirectional reflectance calculation based on Adding method and SAIL formalism : AddingS / AddingSD. In: Remote sensing of environment, 112 (2008)9 pp. 3639-3655. Full text | Full text

Timmermans, J., van der Tol, C., Verhoef, W. and Su, Z. (2008) Contact and directional radiative temperature measurements of sunlit and shaded land surface components during the SEN2FLEX 2005 campaign. In: International journal of remote sensing, 29 (2008)17-18 pp. 5183-5192. Full text | Full text

Huang, D., Knyazikhin, Y., Dickinson, R.E., Rautiainen, M., Stenberg, P., Disney, M., Lewis, P., Cescatti, A., Tian, Y., Verhoef, W. and ... [et al.] (2007) Canopy spectral invariants for remote sensing and model applications. In: Remote sensing of environment, 106 (2007)1 pp. 106-122. Full text | Full text

Verhoef, W. and Bach, H. (2007) Coupled soil - leaf - canopy and atmosphere radiative transfer modeling to simulate hyperspectral multi - angular surface reflectance and TOA radiance data. In: Remote sensing of environment, 109 (2007)2 pp. 166-182. Full text | Full text

Widlowski, J.-L., Taberner, M., Pinty, B., Bruniquel-Pinel, V., Disney, M., Fernandes, R., Gastellu-Etchegorry, J.-P., Gobron, N., Kuusk, A., Lavergne, T., Leblanc, S., Lewis, P.E., Martin, E., Mottus, M., North, P.R.J., Qin, W., Robustelli, M., Rochdi, N., Ruiloba, R., Soler, C., Thompson, R., Verhoef, W. and ... [et al.] (2007) Third radiation transfer model intercomparison RAMI exercise : documenting progress in canopy reflectance models. In: Journal of geophysical research : D Atmospheres, 112(2007)D09111, 28 p. Full text

Verhoef, W., Jia, L., Xiao, Q. and Su, Z. (2007) Unified optical - thermal four - stream radiative transfer theory for homogeneous vegetation canopies. In: IEEE Transactions on geoscience and remote sensing, 45 (2007)6 pp. 1808-1822. Full text

Julien, Y., Sobrino, J.A. and Verhoef, W. (2006) Changes in land surface temperatures and NDVI values over Europe between 1982 and 1999. In: Remote sensing of environment, 103 (2006)1 pp. 43-55. Full text | Full text

Zarco-Tejeda, P.J., Miller, J.R., Pedrós, R., Verhoef, W. and ... [et al.] (2006) FluorMODgui V3.0 : a graphic user interface for the spectral simulation of leaf and canopy chlorophyll fluorescence. In: Computers and geosciences, 32 (2006)5 pp. 577-591. Full text | Full text

Jia, L., Li, Z., Menenti, M., Su, Z., Verhoef, W. and Wan, Z. (2003) A practical algorithm to infer soil and foliage component temperatures from bi - angular ATSR - 2 data. In: International journal of remote sensing, 24 (2003)23 pp. 4739-4760. Full text | Full text

Verhoef, W. and Bach, H. (2003) Remote sensing data assimilation using coupled radiative transfer models. In: Physics and chemistry of the Earth : A, B, C., 28(2003)1-3, pp. 3-13. Full text | Full text

Verhoef, W. (1985) Earth observation modeling based on layer scattering matrices. In: Remote sensing of environment, 17 (1985)4 pp. 165-178. Full text

PhD Theses

Timmermans, J., Su, Z. (Promotor) , Verhoef, W. (Promotor) and van der Tol, C. (assistant promotor)  (2011) Coupling optical and thermal directional radiative transfer to biophysical processes in vegetated canopies. Enschede, University of Twente Faculty of Geo-Information and Earth Observation ITC, 2011. ITC Dissertation 193, ISBN: 978-90-6164-313-5. Full text

Ambarwulan, W., Verhoef, W. (Promotor) and Mannaerts, C.M. (assistant promotor)  (2010) Remote sensing of tropical coastal waters : study of the berau estuary, east Kalimantan, Indonesia. Enschede, University of Twente Faculty of Geo-Information and Earth Observation ITC, 2010. ITC Dissertation 173, ISBN: 978-90-6164-292-3. Full text

Verhoef, W., Molenaar, M. (Promotor) and Bunnik, N.J.J. (co-promotor)  (1998) Theory of radiative transfer models applied in optical remote sensing of vegetation canopies : e-book. Wageningen, Landbouwuniversiteit Wageningen (LUW), 1998. ISBN: 90-5485-804-4. Full text

Conference Proceedings (full papers)

Nguyen Thi Thu Ha, Verhoef, W. and de Bie, C.A.J.M. (2011) Seasonal lai estimation of irrigated rice using soil - leaf - canopy, SLC, radiative transfer model. In: ACRS 2011 : proceedings of the 32nd Asian conference on remote sensing : sensing for Green Asia, 3-7 October 2011, Taipei, Taiwan. - [s.l.] : [s.n.], 2011. - ; 19 cm. ISBN 978-986-02-9190-2. 6 p. Full text

Su, Z., Ma, M., Menenti, M., Sobrino, J.A., Li, Z.L., Verhoef, W., Jia, L., Wen, J., He, Y., Wan, L., Hiu, Q.H., Yu, Q., Li, Xin, van der Velde, R., Dente, L., Zhong, L., Zeng, Y., Tian, X., Li, L., Qin, C., Wang, L., van Helvoirt, M.D., Timmermans, W.J., van der Tol, C., Salama, M.S., Vekerdy, Z. and Ucer, M. (2010) Drought monitoring, prediction and adaptation under climatic changes. In: Proceedings of the symposium : Dragon 2 programme mid - term results 2008 - 2010, 17-21 May 2010, Guilin City, China / editor H. Lacoste-Francis. - Noordwijk : European Space Agency (ESA), 2010. - ; 19 cm. ISBN 978-92-9221-248-3. (ESA - SP : special publication, ISSN 1609-042X ; 684) 13 p. Full text

Timmermans, J., van der Tol, C., Verhoef, A., Wang, L., van Helvoirt, M.D., Verhoef, W. and Su, Z. (2010) Quantifying the uncertainty in estimates of surface atmosphere fluxes by evaluation of sebs and scope models. In: Proceedings of the symposium earth observation and water cycle science, 18-20 November 2009, Frascati, Italy / H. Lacoste-Francis. - Noordwijk : European Space Agency (ESA), 2010. - (ESA - SP : special publication ; 674). ISBN 978-92-9221-238-4. 6 p. Full text

Mazzoni, M., Falorni, P., Guzzi, D., Pippi, I. and Verhoef, W. (2009) A spectral fitting model for chlorophyll fluorescence retrieval at global scal. In: IGARSS 2009 : Proceedings of the 2009 IEEE international geoscience and remote sensing sympsosium : Earth observation, origins and applications, July 12-17, 2009, Cape Town, South Africa, ISBN 978-1-4244-3395-7 pp. I 180 - I 183. Full text | Full text

Su, Z., Chen, Y., Menenti, M., Sobrino, J.A., Li, Z.L., Verhoef, W., Wang, L., Ma, Y., Wan, L., He, Y., Liu, Q.H., Li, C., Wen, J., van der Velde, R., van Helvoirt, M.D., Lin, W. and Shan Xin (2008) Drought monitoring and prediction over China. In: Proceedings of the 2008 Dragon symposium, Dragon programme, final results, 2004-2007, Beijing, China 21-25 April 2008. / ed. by H. Lacoste and L. Ouwehand. Paris : ESA, 2008. ISBN 978-92-9221-219-3 (ESA SP ; 655) 8 p. Full text | Full text

Xin Shan, van der Velde, R., Wen, J., He, Y., Verhoef, W. and Su, Z. (2008) Regional evapotranspiration over the arid inland Heihe river basin in Northwest China. In: Proceedings of the 2008 Dragon symposium, Dragon programme, final results, 2004-2007, Beijing, China 21-25 April 2008. / ed. by H. Lacoste and L. Ouwehand. Paris : ESA, 2008. ISBN 978-92-9221-219-3 (ESA SP ; 655) 9 p. Full text | Full text

Verhoef, W. (2007) A Bayesian optimisation approach for model inversion of hyperspectral - multidirectional observations : the balance with A Priori information. In: ISPRS 2007 : Vol. XXXVI, part 7/C50 : proceedings of ISPMSRS'07 : 10th international symposium on physical measurements and spectral signatures in remote sensing, Davos, Switzerland, March 12-14, 2007 / editor M.E. Schaepman, ... [et al.]. International Society for Photogrammetry and Remote Sensing (ISPRS), 2007. 208-213. Full text | Full text

van der Tol, C., Verhoef, W., Timmermans, J., Su, Z. and Hartogensis, O. (2007) A combined radiative transfer and micrometeorological model. In: Proceedings of the AGRISAR and EAGLE campaigns, final workshop, 15-16 October, 2007. ESA/ESTEC, Noordwijk, The Netherlands. ESA, 2007 (ESA Proceedings WPP-279) 7 p. Full text

Schlerf, M., Verhoef, W., Buddenbaum, H., Hill, J., Atzberger, C.G. and Skidmore, A.K. (2007) Comparing three canopy reflectance models with hyperspectral multi - angular satellite data. In: ISPRS 2007 : Vol. XXXVI, part 7/C50 : proceedings of ISPMSRS'07 : 10th international symposium on physical measurements and spectral signatures in remote sensing, Davos, Switzerland, March 12-14, 2007 / editor M.E. Schaepman, ... [et al.]. International Society for Photogrammetry and Remote Sensing (ISPRS), 2007. 404-407. Full text | Full text

Salama, M.S., Verhoef, W., Monbaliu, J., Vekerdy, Z., Mannaerts, C.M. and Su, Z. (2007) Validation technique for remote sensing products of inland water quality. In: Proceedings of the AGRISAR and EAGLE campaigns, final workshop, 15-16 October, 2007. ESA/ESTEC, Noordwijk, The Netherlands. ESA, 2007 (ESA Proceedings WPP-279) 8 p. Full text

Verhoef, W., Jia, L. and Su, Z. (2006) Optical - thermal canopy radiance directionality model by unified 4SAIL model. In: Second recent advances in quantitative remote sensing : proceedings of the 2nd international symposium on recent advances in quantitative remote sensing RAQRS'II , 25-29 September 2006, Valencia, Spain. / ed. by J.A. Sobrino. Valencia : Universitat de Valencia, 2006. ISBN 978-84-370-6533-5. pp.1-6. Full text

Jacquemoud, S., Verhoef, W. and ... [et al.] (2006) PROSPECT + SAIL : 15 years of use for land surface characterization. In: IGARSS 2006 : Proceedings IEEE International geoscience and remote sensing symposium, 31 July - 4 august 2006. Denver, Colorado. IEEE, 2006. 4 p. Full text

Verhoef, W. (2004) Extension of SAIL to model solar - induced canopy fluorescence spectra. In: Proceedings of the 2nd international workshop on remote sensing of vegetation fluorescence, 17-19 Nov. 2004, Montreal, Canada. / Paris : ESA, 2004. (ESA WPP ; 242) 18 p. Full text

Verhoef, W. (2002) Improved modelling of multiple scattering in leaf canopies : the model SAIL++. In: Proceedings of the 1st international symposium on recent advances in quantitative remote sensing RAQRS- I, 16-20 September, 2002 Torrent, Spain. / ed. J.A. Sobrino. Valencia : Universitat de Valencia, 2002. pp. 11-20. Full text

Bach, H. and Verhoef, W. (2002) Simulation of SPECTRA like scenes using coupled leaf, canopy and atmospheric radiative transfer models. In: Proceedings of the 1st international symposium on recent advances in quantitative remote sensing RAQRS- I, 16-20 September, 2002 Torrent, Spain. / ed. J.A. Sobrino. Valencia : Universitat de Valencia, 2002. pp. 863-870. Full text

Bach, H., Verhoef, W. and Schneider, K. (2000) Coupling remote sensing observation models and a growth model for improved retrieval of, geo, biophysical information from optical remote sensing data. In: Remote sensing for agriculture, ecosystems and hydrology II : proceedings of the conference, Barcelona, Spain, 25-27 September 2000. / ed. by. M. Owe and G. D'Urso. Bellingham: SPIE, 2000. (Proceedings of SPIE ; 4171) pp. 1-11. Full text

Scientific and Professional Publications

Verhoef, W. (2009) A closer look at remote sensing : inaugural address by Wouter Verhoef, professor of advanced earth observation for water resources applications, 7 October 2009, ITC, Enschede, The Netherlands. Enschede, ITC, 2009. ISBN: 978-90-6164-277-0. Full text

Presentations

Su, Z., Ma, Y., van der Velde, R., Dente, L., Wang, L., Menenti, M., Sobrino, J., Li, Z.L., Verhoef, W., Jia, L., Wen, J., He, Y., Li, W., Liu, Q., Yu, Q., Li, X., Zhong, L., Zheng, Y., Tian, X., Li, L., Qin, C., Timmermans, W.J., van Helvoirt, M.D., van der Tol, C., Salama, M.S. and Vekerdy, Z. (2011) Drought monitoring, prediction and adaptation under climatic changes : abstract. In: ESA - MOST Dragon 2 symposium, 20-24 June 2011, Prague, Czech Republic. 1 p. Full text | Full text

Timmermans, J., van der Tol, C., Verhoef, A., Verhoef, W., Su, Z., van Helvoirt, M.D. and Wang, L. (2011) Evaluation of the SEBS parameterizations over tall vegetation using SCOPE estimated turbulent fluxes : abstract. In: Geophysical Research Abstracts, 13(2011) EGU2011-11647, EGU general assembly 2011. 1 p. Full text | Full text

Wandera, L.N.N., Verhoef, W., Schlerf, M., Fauzi, A. and Skidmore, A.K. (2011) Inversion of a radiative transfer model applied to hyperspectral imagery to predict chlorophyll concentration in a mangrove forest : poster : abstract. In: 7th EARSEL workshop of the Special Interest Group in imaging spectroscopy : final programme, 11-13 April 2011, Edinburgh, UK. pp. 77. Full text

Verhoef, W. (2011) Modelling vegetation fluorescence observations : abstract. In: 7th EARSEL workshop of the Special Interest Group in imaging spectroscopy : final programme, 11-13 April 2011, Edinburgh, UK. pp. 41-42. Full text

Su, Z., Ma, Y., Menenti, M., Sobrino, J.A., Li, Z.L., Verhoef, W., Jia, L., Wen, J., He, Y., Wan, L., Liu, Q., Yu, Q., Li, Xin, van der Velde, R., Dente, L., Zhong, L., Zeng, Y., Xin Tian, Wang Lichun and Vekerdy, Z. (2009) Drought monitoring, prediction and adaptation under climatic changes : some recent progress : abstract. In: 2009 Dragon 2 symposium : abstract book, Barcelona, Spain, 22-26 June 2009 / ed. by Y.L. Desnos, Li Zengyuan. - Frascati : European Space Agency (ESA), 2009. pp. 93-95. Full text

van der Tol, C. and Verhoef, W. (2009) Monitoring GPP using chlorophyll fluorescence : abstract. Presented at the 2009 AGU fall meeting, 14-18 December, San Francisco, USA. 1 p. Full text

van der Tol, C., Verhoef, W., Verhoef, A., Houldcroft, C.J., Timmermans, J., Su, Z. and Timmermans, W.J. (2008) Exploring the potential of an integrated radiative transfer and surface energy balance model. In: Geophysical research abstracts : EGU general assembly 2008, 10(2008). 1 p. Full text | Full text

Timmermans, J., van der Tol, C., Verhoef, W., Vekerdy, Z., van Laake, P.E. and Su, Z. (2008) Intercomparison of SAIL and DART over a pine forest using laserscan derived structural parameters. In: Geophysical research abstracts : EGU general assembly 2008, 10(2008). 2 p. Full text | Full text

Timmermans, J., van der Tol, C., Verhoef, W., Jia, L. and Su, Z. (2007) Directional radiative measurements on forest, hey and young maize during the EAGLE2006 field campaign : abstract. Presented at European Geo-sciences Union, 15-20 april 2007, Vienna, Austria. 1 p. Full text

Timmermans, J., Verhoef, W., Weligepolage, K., van der Tol, C. and Su, Z. (2007) Simulation of Sentinel 2 using AHS data : abstract. Presented at AgriSAR and EAGLE Campaigns Final Workshop, 15-16 October 2007, ESA, ESTEC, Noordwijk. 1 p. Full text

Salama, M.S., Verhoef, W., Monbaliu, J., Vekerdy, Z., Mannaerts, C.M., Su, Z. and Abouali, M. (2007) Technique for validating remote sensing products of water quality : powerpoint. Presented at AgriSAR and EAGLE Campaigns Final Workshop, 15-16 October 2007, ESA, ESTEC, Noordwijk. 29 slides. Full text

Bach, H., Begiebing, S. and Verhoef, W. (2005) Analysis of hyperspectral and directional CHRIS data for monitoring of agricultural crops using the canopy reflectance model SLC. Presented at the 9th international symposium on physical measurements and signatures in remote sensing ISPMSRS, 17-19 October 2005, Beijing, China. 3 p. Full text

Verhoef, W. (2005) Earth observation model sensitivity analysis to assess mission performances in terms of geo - biophysical variable retrieval accuracies. Presented at the 9th international symposium on physical measurements and signatures in remote sensing ISPMSRS, 17-19 October 2005, Beijing, China. 4 p. Full text