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

Camps, A.; Font, Jordi; Corbella, I.; Vall-llossera, M.; Portabella, Marcos; Ballabrera-Poy, Joaquim; González, Virginia Barciela; Piles, María; Aguasca, A.; Acevo, R.; Bosch, Xavier; Duffo, N.; Fernández, Pedro Riesgo; Gabarró, Carolina; Gourrion, Jérôme; Guimbard, Sébastien; Marín, Anna; Martínez, Justino; Monerris, A.; Mourre, Baptiste; Pérez, Fernando; Rodríguez, Nereida; Salvador, Joaquín; Sabia, Roberto; Talone, Marco; Torres, F.; Pablos, Míriam; Turiel, Antonio; Valencia, E.; Martínez-Fernández, José; Sánchez, Nilda; Pérez-Gutiérrez, C.; Baroncini-Turricchia, G.; Rius, A.; Ribó, S.

doi:10.3390/rs4051272

Cited by 11 publications

(9 citation statements)

References 76 publications

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“…Global Navigation Satellite System Reflectometry (GNSS-R) could potentially overcome these limitations, since the use of GNSS signals as sources of opportunity would allow for very dense multistatic radar measurements at L-Band. Such measurements have been previously shown-both theoretically and experimentally-to be sensitive to soil moisture and vegetation parameters [1][2][3][4][5][6][7][8][9]. Nevertheless, in order to obtain precise soil moisture and vegetation biomass estimates, several aspects still need to be studied in depth.…”

Section: Introductionmentioning

confidence: 99%

Global Navigation Satellite Systems Reflectometry as a Remote Sensing Tool for Agriculture

et al. 2012

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The use of Global Navigation Satellite Systems (GNSS) signals for remote sensing applications, generally referred to as GNSS-Reflectometry (GNSS-R), is gaining increasing interest among the scientific community as a remote sensing tool for land applications. This paper describes a long term experimental campaign in which an extensive dataset of GNSS-R polarimetric measurements was acquired over a crop field from a ground-based stationary platform. Ground truth ancillary data were also continuously recorded during the whole experimental campaign. The duration of the campaign allowed to cover a full crop growing season, and as a consequence of seasonal rains on the experimental area, data could be recorded over a wide variety of soil conditions. This enabled a study on the effects of different land bio-geophysical parameters on GNSS scattered signals. It is shown that significant power variations in the measured GNSS reflected signals can be detected for different soil moisture and vegetation development conditions. In this work we also propose a technique based on the combination of the reflected signal's polarizations in Remote Sens. 2012, 4 2357 order to improve the integrity of the observables with respect to nuisance parameters such as soil roughness.

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Section: Introductionmentioning

confidence: 99%

Global Navigation Satellite Systems Reflectometry as a Remote Sensing Tool for Agriculture

et al. 2012

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“…The interested reader is also referred to Camps et al . [] and the web links ((http://www.icm.csic.es/oce/), and (http://www.tsc.upc.edu/rslab/Passive%20Remote%20Sensing/Welcome).…”

Section: Upc–icm Contributions To the Smos Missionmentioning

confidence: 99%

Microwave interferometric radiometry in remote sensing: An invited historical review

et al. 2014

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The launch of the Soil Moisture and Ocean Salinity (SMOS) mission on 2 November 2009 marked a milestone in remote sensing for it was the first time a radiometer capable of acquiring wide field of view images at every single snapshot, a unique feature of the synthetic aperture technique, made it to space. The technology behind such an achievement was developed, thanks to the effort of a community of researchers and engineers in different groups around the world. It was only because of their joint work that SMOS finally became a reality. The fact that the European Space Agency, together with CNES (Centre National d'Etudes Spatiales) and CDTI (Centro para el Desarrollo Tecnológico e Industrial), managed to get the project through should be considered a merit and a reward for that entire community. This paper is an invited historical review that, within a very limited number of pages, tries to provide insight into some of the developments which, one way or another, are imprinted in the name of SMOS.

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“…Some other large scale measurement missions have recently started, with the SMOS (Soil Moisture and Ocean Salinity) satellite of the ESA, in orbit since 2009, that measures soil moisture with a spatial resolution of 35-50 km, with an accuracy of 4%, and a revisit time of one to three days. The satellite uses a Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) working in the L band (1.4 GHz) [61,62]. In the USA, NASA is preparing the SMAP (Soil Moisture Active Passive) mission, with a satellite launch for 2014, carrying a radiometer and synthetic aperture radar (SAR) in the L band as well (1.20-1.41 GHz), with the same accuracy and revisit time as SMOS but an improved resolution of 10 km [63].…”

Section: Satellite Productsmentioning

confidence: 99%

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

et al. 2013

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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. Current observation techniques quantifying soil moisture or characterizing a snow pack often require dedicated instrumentation that measures either at point scale or at very large (satellite pixel) scale. 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. This paper provides an overview of the challenges and status of the determination of soil moisture and snow properties in alpine environments. Current measurement techniques and newly proposed ones, based on the reception of reflected Global Navigation Satellite Signals (i.e., GNSS Reflectometry or GNSS-R), or the use of laser scanning are reviewed, and the perspectives offered by these new techniques to fill the current gap in the instrumentation level are discussed. Some key enabling technologies OPEN ACCESSRemote Sens. 2013, 5 3517 including the availability of modernized GNSS signals and GNSS array beamforming techniques are also considered and discussed.

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

Cited by 11 publications

References 76 publications

Global Navigation Satellite Systems Reflectometry as a Remote Sensing Tool for Agriculture

Global Navigation Satellite Systems Reflectometry as a Remote Sensing Tool for Agriculture

Microwave interferometric radiometry in remote sensing: An invited historical review

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

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