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SPACEBORNE GNSS-R RETRIEVING ON GLOBAL SOIL MOISTURE APPROACHED BY SUPPORT VECTOR MACHINE LEARNING

A. Lwin, D. Yang, X. Hong, S. Cheraghi Shamsabadi, W. A. Ahmed
2020 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
as inputs and the Soil Moisture and Ocean Salinity (SMOS) soil moisture data as a reference to retrieve global SM daily basis.  ...  The feasibility of this approach could provide the performance for spaceborne GNSS-R retrieving to soil moisture analysis.  ...  ACKNOWLEDGEMENTS The authors are much grateful to the space-related organizations for their data that freely provided by UK's TDS, NOAA and ESA SMOS mission.  ... 
doi:10.5194/isprs-archives-xliii-b3-2020-605-2020 fatcat:xi3yfhufmbh7vnen3xlvyzheji

Retrieval of Soil Moisture by Integrating Sentinel-1A and MODIS Data over Agricultural Fields

Yizhi Han, Xiaojing Bai, Wei Shao, Jie Wang
2020 Water  
These promising results confirm the feasibility and validity of the coupled model for soil moisture retrieval from the Sentinel-1A and MODIS data.  ...  The modeled results show that the retrieved soil moisture can capture the seasonal dynamics of soil moisture with R ranging from 0.74 to 0.81.  ...  The soil moisture data collected by the REMEDHUS ground monitoring network were applied to many research fields, such as the calibration and validation of the Soil Moisture and Ocean Salinity (SMOS) soil  ... 
doi:10.3390/w12061726 fatcat:a634wsmkbrgvjen3bpuqouajfm

Evaluation of AMSR-E retrieval by detecting soil moisture decrease following massive dryland re-vegetation in the Loess Plateau, China

Xiaoming Feng, Jiaxing Li, Wei Cheng, Bojie Fu, Yunqiang Wang, Yihe Lü, Ming'an Shao
2017 Remote Sensing of Environment  
In this study, we propose a method to evaluate the spatiotemporal variance of satellite retrieval based on the evaluation of soil moisture retrievals from the Advanced Microwave Scanning Radiometer on  ...  Our study found that AMSR-E retrievals posted by the Japanese Aerospace Exploration Agency (JAXA) capture the spatiotemporal variance of soil moisture in the Loess Plateau, as well as the in-situ measured  ...  The available global soil moisture retrievals do not meet the mission-specified accuracy over certain areas.  ... 
doi:10.1016/j.rse.2017.05.012 fatcat:y5u5r27snrdodaeq7dnr6brzai

Retrieving High-Resolution Surface Soil Moisture by Downscaling AMSR-E Brightness Temperature Using MODIS LST and NDVI Data

Chengyun Song, Li Jia, Massimo Menenti
2014 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
A method to retrieve soil moisture at high spatial resolution is presented in this paper. The method is based on soil moisture retrieval with passive brightness temperature.  ...  High-resolution soil moisture is retrieved with the downscaled microwave brightness temperature using a single-channel algorithm (SCA) and the Qp model to deal with the influence of roughness.  ...  feasible way to derive high resolution soil moisture.  ... 
doi:10.1109/jstars.2013.2272053 fatcat:pbtd2mgqsrdkfonycevz6l3ru4

Flagging the Topographic Impact on the SMOS Signal

A. Mialon, L. Coret, Y.H. Kerr, F. Secherre, J.-P. Wigneron
2008 IEEE Transactions on Geoscience and Remote Sensing  
As a result, a map of pixels to be flagged is produced to ensure no soil moisture retrievals are carried out on pixels which are affected by a strong topographic effects.  ...  Soil moisture retrieval models from Soil Moisture and Ocean Salinity (SMOS) mission, an L-band microwave interferometer, are based on multi-angular measurements and make use of the emissivity angular signature  ...  soil moisture retrieval at the SMOS scale).  ... 
doi:10.1109/tgrs.2007.914788 fatcat:u7emlkcdyvb4zavk5xaz5k7kci

Sea Surface Salinity mapping with SMOS space mission [chapter]

Jordi Font, Gary Lagerloef, Yann Kerr, Niels Skou, Michael Berger
2003 Elsevier Oceanography Series  
SMOS will exploit an innovative instrument designed as a 2-D interferometer acquiring globally brightness temperatures at L-band (1.4 GHz) to retrieve soil moisture fields over the land surfaces and ocean  ...  The European Space Agency SMOS (Soil Moisture and Ocean Salinity) mission is scheduled for launch in 2006.  ...  Science Advisory Group, and the members of the different ESA study and campaign teams.  ... 
doi:10.1016/s0422-9894(03)80031-4 fatcat:udf7kelt5javji74ov5pn22rzu

Soil moisture retrieval from space: the Soil Moisture and Ocean Salinity (SMOS) mission

Y.H. Kerr, P. Waldteufel, J.-P. Wigneron, J. Martinuzzi, J. Font, M. Berger
2001 IEEE Transactions on Geoscience and Remote Sensing  
Such a system, relying on a deployable structure, has now proved to be feasible and has led to the Soil Moisture and Ocean Salinity (SMOS) mission, which is described in this paper.  ...  The goal of this paper is to present the main aspects of the baseline mission 1 and describe how soil moisture will be retrieved from SMOS data.  ...  The SMOS concept by delivering angular information allows retrieving soil moisture in the presence of vegetation [16] , [17] .  ... 
doi:10.1109/36.942551 fatcat:quz22pubhvb7pgetclws5b6itq

Disaggregation of SMOS Soil Moisture in Southeastern Australia

Olivier Merlin, Christoph Rudiger, Ahmad Al Bitar, Philippe Richaume, Jeffrey P. Walker, Yann H. Kerr
2012 IEEE Transactions on Geoscience and Remote Sensing  
In this study, the disaggregation 10 approach is applied to soil moisture and ocean salinity (SMOS) 11 data over the 500 km by 100 km AACES (Australian Airborne 12 Calibration/validation Experiments for  ...  DisPATCh converts soil temperature fields 7 into soil moisture fields given a semi-empirical soil evaporative 8 efficiency model and a first-order Taylor series expansion around 9 the field-mean soil moisture  ...  The sampling grid of the 193 SMOS level-2 soil moisture product is called DGG or discrete 194 global grid [19], [20] and has a node separation of about 195 15 km.  ... 
doi:10.1109/tgrs.2011.2175000 fatcat:eyfprjf2cfgexkivu7uzj7dknq

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

María Piles, Adriano Camps, Mercè Vall-llossera, Ignasi Corbella, Rocco Panciera, Christoph Rudiger, Yann H. Kerr, Jeffrey Walker
2011 IEEE Transactions on Geoscience and Remote Sensing  
A downscaling approach to improve the spatial resolution of Soil Moisture and Ocean Salinity (SMOS) soil moisture estimates with the use of higher resolution visible/infrared (VIS/IR) satellite data is  ...  Following the SMOS launch, a downscaling strategy for the estimation of soil moisture at high resolution from SMOS using MODIS VIS/IR data has been developed.  ...  ACKNOWLEDGMENT The authors would like to thank Arnaud Mialon for the assitance provided with the preliminary SMOS soil moisture products.  ... 
doi:10.1109/tgrs.2011.2120615 fatcat:vr3tewapnfbprdoijeysojx2kq

A soil moisture and temperature network for SMOS validation in Western Denmark

S. Bircher, N. Skou, K. H. Jensen, J. P. Walker, L. Rasmussen
2012 Hydrology and Earth System Sciences  
</strong> The Soil Moisture and Ocean Salinity Mission (SMOS) acquires surface soil moisture data of global coverage every three days.  ...  The discrepancies between network and SMOS soil moisture will be subject of subsequent studies.</p>  ...  Edited by: N. Verhoest  ... 
doi:10.5194/hess-16-1445-2012 fatcat:kk4nbsvejregfgf43cewnxcixy

A soil moisture and temperature network for SMOS validation in Western Denmark

S. Bircher, N. Skou, K. H. Jensen, J. P. Walker, L. Rasmussen
2011 Hydrology and Earth System Sciences Discussions  
The Soil Moisture and Ocean Salinity Mission (SMOS) acquires surface soil moisture data of global coverage every three days.  ...  The discrepancies between network and SMOS soil moisture will be subject of subsequent studies. Published by Copernicus Publications on behalf of the European Geosciences Union.  ...  Edited by: N. Verhoest  ... 
doi:10.5194/hessd-8-9961-2011 fatcat:y42b4zm2grbi5dpbbhivmwfyba

A new space technology for ocean observation: the SMOS mission

Joaquim Ballabrera-Poy, Jordi Font, Adriano Camps, Ignasi Corbella, Núria Duffo, Israel Duran, Mikhail Emelianov, Luis Enrique, Pere Fernández, Carolina Gabarró, Cristina González, Verónica González (+23 others)
2012 Scientia Marina  
of global sea surface salinity maps operationally produced by CP34.  ...  New technological developments during the 1990s at the European Space Agency led to the proposal of SMOS (Soil Moisture and Ocean Salinity), an Earth explorer opportunity mission based on the use of a  ...  the SMOS mission) from the Spanish R+D National Plan, which were also the main source of funding for SMOS-BEC activities.  ... 
doi:10.3989/scimar.03621.19k fatcat:d3lyelivobfcddbrdokoo5mrei

A Novel Bias Correction Method for Soil Moisture and Ocean Salinity (SMOS) Soil Moisture: Retrieval Ensembles

Ju Lee, Jungho Im
2015 Remote Sensing  
We introduce a retrieval algorithm-specific and spatially heterogeneous Instantaneous Field of View (IFOV) bias correction method for Soil Moisture and Ocean Salinity (SMOS) soil moisture.  ...  We illustrate that retrieval ensembles effectively mitigated the overestimation problem of SMOS soil moisture arising from brightness temperature errors over West Africa in a computationally efficient  ...  Based on a French initiative, AMMA has been constructed by an international group and is currently funded by a large number of agencies, especially from France, the UK, the US and Africa.  ... 
doi:10.3390/rs71215824 fatcat:kg47kuz6avhhhemeimn76cjhgq

Evaluation of SMOS Soil Moisture Products Over Continental U.S. Using the SCAN/SNOTEL Network

Ahmad Al Bitar, Delphine Leroux, Yann H. Kerr, Olivier Merlin, Philippe Richaume, Alok Sahoo, Eric F. Wood
2012 IEEE Transactions on Geoscience and Remote Sensing  
In this study validation of SMOS products over continental US is done by using the SCAN/SNOTEL soil moisture monitoring stations.  ...  A global comparison of the SCAN/SNOTEL versus SMOS is made.Statistics show an under estimation of the soil moisture from SMOS compared to the SCAN/SNOTEL local measurements.  ...  Time series from SCAN/SNOTEL datasets are compared to SMOS soil moisture retrievals.The results show that at over a variety of sites SMOS retrievals are of good quality but globally SMOS observations show  ... 
doi:10.1109/tgrs.2012.2186581 fatcat:54hnvdpkvvahte2mvxmxhvpxcq

Deriving VTEC Maps from SMOS Radiometric Data

Roselena Rubino, Nuria Duffo, Verónica González-Gambau, Ignasi Corbella, Francesc Torres, Israel Durán, Manuel Martín-Neira
2020 Remote Sensing  
In this work, a new methodology is proposed in order to derive vertical total electron content (VTEC) maps from the radiometric measurements of the Soil Moisture and Ocean Salinity (SMOS) mission as an  ...  It is also possible to retrieve the Faraday rotation angle from the recovered VTEC maps in order to correct the effect that it causes in the SMOS brightness temperatures.  ...  Funding: This research was supported by the European Space Agency and Deimos Engenharia (Portugal), SMOS P7 Subcontract DME CP12 no. 2015-005; ERDF (European Regional Development Fund); by the Spanish  ... 
doi:10.3390/rs12101604 fatcat:dxllimxuiverjbx6mcmlfgxjpi
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