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N. Sánchez, A. Alonso-Arroyo, J. Martínez-Fernández, A. Camps, A. González-Zamora, M. Pablos, C. M. Herrero-Jiménez, A. Gumuzzio
2015 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
of GNSS-R reflectivity with a time-collocated Landsat 8 imagery for soil moisture retrieval under semiarid climatic conditions.  ...  While the synergy between thermal, optical and passive microwave spectra observations is well known for vegetation parameters and soil moisture retrievals, the experiment aimed to evaluate the synergy  ...  ACKNOWLEDGEMENTS This study was supported by the European Community Seventh Framework Programme, FP7-Space-2013-1 (Project E-GEM ID 607126) and the Spanish MINECO (Projects AYA2011-29183-C02-01 and AYA2012  ... 
doi:10.5194/isprsarchives-xl-7-w3-1299-2015 fatcat:td5d4esrcrb5hm35yjjm7yt3gi

On the Synergy of Airborne GNSS-R and Landsat 8 for Soil Moisture Estimation

Nilda Sánchez, Alberto Alonso-Arroyo, José Martínez-Fernández, María Piles, Ángel González-Zamora, Adriano Camps, Mercè Vall-llosera
2015 Remote Sensing  
The Light Airborne Reflectometer for GNSS-R Observations (LARGO) observations, together with optical, infrared, and thermal bands from Landsat 8, were linked through a semi-empirical model to field soil  ...  on GNSS Reflectometry (GNSS-R) was tested for soil moisture estimation.  ...  Nilda Sá nchez, Alberto Alonso-Arroyo and Ángel Gonzá lez-Zamora processed the field, airborne and satellite data.  ... 
doi:10.3390/rs70809954 fatcat:a5vncxlie5g2tojvnausf4hhf4

Single-Pass Soil Moisture Retrievals Using GNSS-R: Lessons Learned

Adriano Camps, Hyuk Park, Jordi Castellví, Jordi Corbera, Emili Ascaso
2020 Remote Sensing  
In this paper, an algorithm to retrieve surface soil moisture from GNSS-R (Global Navigaton Satellite System Reflectometry) observations is presented.  ...  With this correction, reasonable surface soil moisture values are obtained up to approximately a 30° incidence angle, beyond which the GNSS-R retrieved surface soil moisture spreads significantly.  ...  Acknowledgments: The authors would like to thank the flight department of ICGC for the work carried out to design and implement the new sensors onboard ICGC airplane as well as the operational flight campaign  ... 
doi:10.3390/rs12122064 fatcat:nzuiepxxznbc3bftu6nvdi6isq

Spaceborne GNSS Reflectometry

Kegen Yu, Shuai Han, Jinwei Bu, Yuhang An, Zhewen Zhou, Changyang Wang, Sajad Tabibi, Joon Wayn Cheong
2022 Remote Sensing  
Compared with ground-based and airborne GNSS-R approaches, spaceborne GNSS-R has a number of advantages, including wide coverage and the ability to sense medium- and large-scale phenomena such as ocean  ...  Accordingly, the data have been widely used to carry out a variety of studies for a range of useful applications, and significant research outcomes have been generated.  ...  Acknowledgments: We are very grateful for the anonymous reviewers' comments, which have greatly improved the quality and content of the manuscript.  ... 
doi:10.3390/rs14071605 fatcat:k7kh5pb4tje3rhved3trrofabu

Inter-comparison of Proximal Near-Surface Soil Moisture Measurement Techniques

Xiaoling Wu, Jeffrey P. Walker, Francois Jonard, Nan Ye
2022 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
A number of proximal sensing technologies were then evaluated and inter-compared for their accuracy in retrieving high resolution near-surface soil moisture.  ...  The average RMSE and R were found to be 0.055 cm 3 /cm 3 and 0.68 for ELBARA III, 0.084 cm 3 /cm 3 and 0.51 for LARGO, and 0.090 cm 3 /cm 3 and 0.32 for the EM38.  ...  Adriano Camps for the GNSS data processing.  ... 
doi:10.1109/jstars.2022.3156878 fatcat:dfbsxv4pbrbi5pxm6zpa3bvciq

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

Joan Francesc Munoz-Martin, Raul Onrubia, Daniel Pascual, Hyuk Park, Miriam Pablos, Adriano Camps, Christoph Rüdiger, Jeffrey Walker, Alessandra Monerris
2021 Remote Sensing  
However, single-pass GNSS-R soil moisture retrieval is still a challenge.  ...  Global Navigation Satellite System—Reflectometry (GNSS-R) has already proven its potential for retrieving a number of geophysical parameters, including soil moisture.  ...  The authors would also like to thank Gerard Portal for his initial survey to retrieve the Sentinel-2 data. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs13040797 fatcat:34m4nacl3fhr5ca5m4lrmuphqu

Review of the CALIMAS Team Contributions to European Space Agency's Soil Moisture and Ocean Salinity Mission Calibration and Validation

Adriano Camps, Jordi Font, Ignasi Corbella, Mercedes Vall-Llossera, Marcos Portabella, Joaquim Ballabrera-Poy, Verónica González, María Piles, Albert Aguasca, René Acevo, Xavier Bosch, Nuria Duffo (+23 others)
2012 Remote Sensing  
resolution of soil moisture products using data fusion, as well as the feasibility of GNSS-R techniques for sea state determination and soil moisture monitoring.  ...  resolution data from optical/infrared sensors).  ...  of Science and Innovation, and a EURYI 2004 award from the European Science  ... 
doi:10.3390/rs4051272 fatcat:fez5it5ppja2nbihfg6cn37gti

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

Alberto Alonso-Arroyo, Adriano Camps, Alessandra Monerris, Christoph Rudiger, Jeffrey P. Walker, Raul Onrubia, Jorge Querol, Hyuk Park, Daniel Pascual
2016 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
This binning was previously used in [57] to analyze the correlation between GNSS-R data and optical, near-infrared and thermal indexes.  ...  airborne capability for simulating new satellite missions for soil moisture.  ... 
doi:10.1109/jstars.2016.2588281 fatcat:76i4dlrojngdtfiu65jhrv3yly

Recent Progress on Vegetation Remote Sensing Using Spaceborne GNSS-Reflectometry

Xuerui Wu, Peng Guo, Yueqiang Sun, Hong Liang, Xinggang Zhang, Weihua Bai
2021 Remote Sensing  
With the CYGNSS (Cyclone Global Navigation Satellite System) launch and the increased data acquisition, the use of spaceborne GNSS-R for vegetation monitoring has become a research hotspot.  ...  The potential feasibility of polarization GNSS-R and future development trends of GNSS-R technology in quantitative retrieval (such as vegetation water content and biomass) are also discussed.  ...  We also thank Andrés Calabia in Nanjing University of Information Science and Technology for his wonderful work as for the abstract graphic figure.  ... 
doi:10.3390/rs13214244 fatcat:c4pfgyk4ivb43i3fj4ouoqbqem

Ground, Proximal and Satellite Remote Sensing of Soil Moisture

Ebrahim Babaeian, Morteza Sadeghi, Scott B. Jones, Carsten Montzka, Harry Vereecken, Markus Tuller
2019 Reviews of Geophysics  
Despite the impressive progress over the last decade, there are still many opportunities and needs to, for example, improve SM retrieval from remotely sensed optical, thermal, and microwave data and opportunities  ...  Soil moisture (SM) is a key hydrologic state variable that is of significant importance for numerous Earth and environmental science applications that directly impact the global environment and human society  ...  Acknowledgments We acknowledge funding from the National Science Foundation (NSF) via grants 1521164 and 1521469 awarded to the University of Arizona and Utah State University.  ... 
doi:10.1029/2018rg000618 fatcat:hcfa2uqiz5ffnf7o3fijc6rnwu

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  
Results showed fairly good agreement with ground-based soil moisture measurements and illustrated the strength of the link between VIS/IR satellite data and soil moisture status.  ...  In preparation for the SMOS launch, the algorithm was tested using observations of the UPC Airborne RadIomEter at L-band (ARIEL) over the Soil Moisture Measurement Network of the University of Salamanca  ...  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

Remote Sensing of Forest Biomass Using GNSS Reflectometry

Emanuele Santi, Simonetta Paloscia, Simone Pettinato, Giacomo Fontanelli, Maria Paola Clarizia, Davide Comite, Laura Dente, Leila Guerriero, Nazzareno Pierdicca, Nicolas Floury
2020 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
with vegetation optical depth (VOD) derived from the Soil Moisture Active Passive L-band radiometer, with a pantropical aboveground biomass (AGB) map and then with a tree height (H) global map derived  ...  These correlations were not sufficient to retrieve the target parameters by simple inversion of the direct relationships.  ...  ACKNOWLEDGMENTS The authors acknowledge SSTL and the CyGNSS project for making available the GNSS-R satellite data and NASA for the SMAP data.  ... 
doi:10.1109/jstars.2020.2982993 fatcat:ck3bwqu36nhyhi4r5gbmdwvbvi

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

Alberto Alonso Arroyo, Adriano Camps, Albert Aguasca, Giuseppe F. Forte, Alessandra Monerris, Cristoph Rudiger, Jeffrey P. Walker, Hyuk Park, Daniel Pascual, Raul Onrubia
2014 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
Finally, a comparison between the data retrieved from the SMIGOL instrument and the ground-truth soil moisture data is presented showing a good agreement between them and rainfall information.  ...  An upgrade of the SMIGOL GNSS-R instrument for dual-polarization observations is presented.  ...  Winston for his help in the installation and maintenance of P-SMIGOL at the experiment site.  ... 
doi:10.1109/jstars.2014.2320792 fatcat:zqegdxevgzb37ji5zs6yohzfay

Soil Moisture & Snow Properties Determination with GNSS in Alpine Environments: Challenges, Status, and Perspectives

Cyril Botteron, Nicholas Dawes, Jérôme Leclère, Jan Skaloud, Steven Weijs, Pierre-André Farine
2013 Remote Sensing  
Moisture content in the soil and snow in the alpine environment is an important factor, not only for environmentally oriented research, but also for decision making in agriculture and hazard management  ...  Given the heterogeneity of both snow cover and soil moisture in alpine terrain, observations of the spatial distribution of moisture and snow-cover are lacking at spatial scales relevant for alpine hydrometeorology  ...  Figure 1 . 1 Example of a local-scale static GNSS-R experiment. 4.1.1. GNSS-R for Soil Moisture Recovery Table 1 . 1 Typical soil moisture measurement methods applicable for the alpine environment.  ... 
doi:10.3390/rs5073516 fatcat:5zkypolyorfozh2np3b2jajbpq

GNSS-Reflectometry and Remote Sensing of Soil Moisture: A Review of Measurement Techniques, Methods, and Applications

Komi Edokossi, Andres Calabia, Shuanggen Jin, Iñigo Molina
2020 Remote Sensing  
In this paper, a detailed review on the current SMC measurement techniques, retrieval approaches, products, and applications is presented, particularly the new and promising GNSS-R technique.  ...  The understanding of land surface-atmosphere energy exchange is extremely important for predicting climate change and weather impacts, particularly the influence of soil moisture content (SMC) on hydrometeorological  ...  Acknowledgments: Great appreciation is given to the 4 reviewers and Sarah Bird for suggestions and corrections of a previous version of this manuscript.  ... 
doi:10.3390/rs12040614 fatcat:qw7r7ojulfc63poxc7zcd6mtva
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