Filters








10 Hits in 7.9 sec

Radar Signatures of Sahelian Surfaces in Mali Using ENVISAT-ASAR Data

Frdric Baup, Eric Mougin, Pierre Hiernaux, Armand Lopes, Patricia De Rosnay, Isabelle Chenerie
2007 IEEE Transactions on Geoscience and Remote Sensing  
This paper presents an analysis of ENSIVAT Advanced Synthetic Aperture Radar data acquired over a Sahelian region located in Mali, West Africa.  ...  In both modes, pronounced angular and temporal signatures are observed for most soil surfaces, and azimuthal effects are observed on markedly orientated rocky surfaces.  ...  ACKNOWLEDGMENT The authors would like to thank ESA for providing the ENVISAT data used in this paper (Project ID 443, E. Mougin).  ... 
doi:10.1109/tgrs.2007.893824 fatcat:4iqqok57hzfb5dloqtjx5sgv2q

Mapping surface soil moisture over the Gourma mesoscale site (Mali) by using ENVISAT ASAR data

F. Baup, E. Mougin, P. de Rosnay, P. Hiernaux, F. Frappart, P. L. Frison, M. Zribi
2010 Hydrology and Earth System Sciences Discussions  
The potentialities of ENVISAT ASAR (Advanced Synthetic Aperture Radar) multi-angle data for mapping surface soil moisture (SSM) in Sahelian rangelands are investigated at medium scale (30 000 km 2 ).  ...  The resulting SSM maps are expected to provide valuable information for initialisation of land surface models and the estimation of the spatial distribution of radiative fluxes.  ...  The authors thank ESA for providing the ENVISAT data used in the present study (Project ID 443, E. Mougin).  ... 
doi:10.5194/hessd-7-7417-2010 fatcat:s7w4goriuzgcppu6domgikkn34

Mapping surface soil moisture over the Gourma mesoscale site (Mali) by using ENVISAT ASAR data

F. Baup, E. Mougin, P. de Rosnay, P. Hiernaux, F. Frappart, P. L. Frison, M. Zribi, J. Viarre
2011 Hydrology and Earth System Sciences  
The potentialities of ENVISAT ASAR (Advanced Synthetic Aperture Radar) multi-angle data for mapping surface soil moisture (SSM) in Sahelian rangelands are investigated at medium scale (30 000 km 2 ).  ...  The resulting SSM maps are expected to provide valuable information for initialisation of land surface models and the estimation of the spatial distribution of radiative fluxes.  ...  The authors thank ESA for providing the ENVISAT data used in the present study (Project ID 443, E. Mougin).  ... 
doi:10.5194/hess-15-603-2011 fatcat:gsgndnxfxbh7njd3hgbzoacpty

Microwave electromagnetic modelling of Sahelian grassland

A. Monsivais-Huertero, I. Chenerie, K. Sarabandi, F. Baup, E. Mougin
2010 International Journal of Remote Sensing  
The validity of the three models applied to grass vegetation is determined by comparing the model predictions with ENVISAT ASAR data gathered in 2005 over Sahelian grassland.  ...  In this paper radar scattering models based on coherent and incoherent formulations for an African grassland (Sahelian) are examined.  ...  Mehrez Zribi of CETP (Centre d'Etude des Environnements Terrestre et Planétaires, Paris, France) for providing us an incoherent version of the IEM model to carry out the soil modelling and for his helpful  ... 
doi:10.1080/01431160902926582 fatcat:mmquu2b7trh6fil4fxkrq3egca

Estimating surface soil moisture over sahel using envisat radar altimetry

C. Fatras, F. Frappart, E. Mougin, M. Grippa, P. Hiernaux
2012 2012 IEEE International Geoscience and Remote Sensing Symposium  
17 This paper analyses the potential of the radar altimeter onboard ENVISAT for 18 estimating surface soil moisture in the semi-arid Gourma region in Northern Mali.  ...  The considered period is 2002-22 33 34 Initially designed to make accurate measurements of the sea surface topography, 54 satellite radar altimetry (RA) has been successfully employed to derive valuable  ...  Soil moisture 585 mapping based on ASAR/ENVISAT radar data over a Sahelian region.  ... 
doi:10.1109/igarss.2012.6351319 dblp:conf/igarss/FatrasFMGH12 fatcat:u3c6jjhklnbrvgzoc4nzea4hom

Estimating surface soil moisture over Sahel using ENVISAT radar altimetry

C. Fatras, F. Frappart, E. Mougin, M. Grippa, P. Hiernaux
2012 Remote Sensing of Environment  
17 This paper analyses the potential of the radar altimeter onboard ENVISAT for 18 estimating surface soil moisture in the semi-arid Gourma region in Northern Mali.  ...  The considered period is 2002-22 33 34 Initially designed to make accurate measurements of the sea surface topography, 54 satellite radar altimetry (RA) has been successfully employed to derive valuable  ...  Soil moisture 585 mapping based on ASAR/ENVISAT radar data over a Sahelian region.  ... 
doi:10.1016/j.rse.2012.04.013 fatcat:stodo3zoondingcvay4c6xxjxi

Impact of Surface Soil Moisture Variations on Radar Altimetry Echoes at Ku and Ka Bands in Semi-Arid Areas

Christophe Fatras, Pierre Borderies, Frédéric Frappart, Eric Mougin, Denis Blumstein, Fernando Niño
2018 Remote Sensing  
A3 Example of a scene using ASTER GDEM data centered close to the Gossi pond in Mali.  ...  to 0.96 at Ka-band over the five study sites representative of the Sahelian zone of Gourma in Mali.  ...  of the DEM data according the altimeter footprint, the delineation of open water areas present in the scene and the orientation of the scene depending whether the altimetry tracks are ascending or descending  ... 
doi:10.3390/rs10040582 fatcat:6b7qnjwmk5fltfdrkdr7z6ptnu

Radar Remote Sensing of Agricultural Canopies: A Review

Susan C. Steele-Dunne, Heather McNairn, Alejandro Monsivais-Huertero, Jasmeet Judge, Pang-Wei Liu, Kostas Papathanassiou
2017 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
Data from several spaceborne SARs including ERS 1/2 SAR, Envisat ASAR, 627 Radarsat and ALOS PALSAR have been used to map rice growth [182], [183], [188]-[190].  ...  The international community involved in collecting both airborne data and 272 ground data is indicative of the growing interest in using radar for crop classification and crop 273 and soil monitoring  ... 
doi:10.1109/jstars.2016.2639043 fatcat:6w5qd3dg2jd7ncdod7nn2un7gi

Application of multi-temporal MERIS-FR and ASAR-WS data for large scale vegetation monitoring in the West African Sahel zone

R Leiterer, J Reiche, C Thiel, C Schmullius, A K Dodo
2008
This study demonstrates the performance and suitability of ENVISAT MERIS-FR and ASAR-WS data for this purpose.  ...  The application of radar capabilities to detect the moisture content and optical information for the phenological state monitoring of the vegetation is demonstrated.  ...  The second group consists of pre-classification change products, focused on seasonal dynamics. As remote sensing data two instruments from the ENVISAT satellite -MERIS and ASAR -are used.  ... 
doi:10.5167/uzh-77223 fatcat:fty53iceqncmzorfeqjfsgo6gi

Analysis of ASAR and MERIS data for large scale water and vegetation monitoring in the Iullemeden aquifer, West African Sahel zone

Reik Leiterer, Johannes Reiche, Christian Thiel, Christiane Schmullius, A K Dodo
2008
This study demonstrates the performance and suitability of ENVISAT MERIS and ASAR-WS data for this purpose.  ...  Land cover classification maps of four different points in time within one growth period were generated using a rule based (object oriented) classification approach.  ...  As remote sensing data two instruments from the ENVISAT satellite -MERIS and ASAR -are used.  ... 
doi:10.5167/uzh-77424 fatcat:shn2k2m3uzasfo2zdfrjw2dcju