AMIRAS—An Airborne MIRAS Demonstrator

Martín-Neira, Manuel; Cabeza, I.; Perez, Chavarria M. A.; Palacios, Miguel; Guijarro, M.A.; Ribó, S.; Corbella, I.; Blanch, S.; Torres, F.; Duffo, N.; González, Virginia Barciela; Beraza, S.; Camps, A.; Vall-llossera, M.; Tauriainen, S.; Pihlflyckt, J.; Gonzalez, Juan; Martín-Porqueras, F.

doi:10.1109/tgrs.2008.916266

Cited by 25 publications

(17 citation statements)

References 11 publications

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“…During the SMOS development, measurements acquired by AMIRAS (airborne MIRAS) [7] and HUT-2D [8] demonstrators have proved the validity of the visibility function proposed by Prof. Corbella. The method to experimentally validate the visibility function is measuring homogeneous targets since the visibility equation becomes directly proportional to the contrast between the brightness temperature of the target and the backward noise of the receivers emitted through the antennas.…”

Section: Validation Using Airborne Datamentioning

confidence: 71%

Experimental validation of the Corbella's visibility function using HUT-2D and MIRAS

Martín-Porqueras

Kainulainen

Martín-Neira

et al. 2010

2010 IEEE International Geoscience and Remote Sensing Symposium

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The Corbella's revision of the fundamental equation of the interferometric aperture synthesis radiometry is verified using airborne and spaceborne data. This experimental verification uses the measurements of the airborne instrument HUT-2D from the Aalto University (Helsinki), and the unique spaceborne microwave imaging radiometer by aperture synthesis (MIRAS) from the ESA's Soil Moisture and Ocean Salinity (SMOS) mission. The data acquired with those sensors support the Corbella's revision of the visibility function. The revised function predicts that visibilities depend on the contrast between the target's brightness temperature and the backward noise of the receivers emitted through the antennas.

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Section: Validation Using Airborne Datamentioning

confidence: 71%

Experimental validation of the Corbella's visibility function using HUT-2D and MIRAS

Martín-Porqueras

Kainulainen

Martín-Neira

et al. 2010

2010 IEEE International Geoscience and Remote Sensing Symposium

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“…This experiment was used to measure the instrument's response to a constant target and also to make an image of the Galaxy over-pass (Martin-Neira et al 2008). Figure 15 shows the instrument placed at the IRTA facilities and the first image of the Milky Way obtained by AMIRAS.…”

Section: The Small Airborne Miras Campaignmentioning

confidence: 99%

From field experiments to salinity products: a tribute to the contributions of Jordi Font to the SMOS mission

Camps¹,

Gabarró²,

Vall-llossera³

et al. 2016

Sci. Mar.

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Summary:This article summarizes some of the activities in which Jordi Font, research professor and head of the Department of Physical and Technological Oceanography, Institut de Ciències del Mar (CSIC, Spanish National Research Council) in Barcelona, has been involved as co-Principal Investigator for Ocean Salinity of the European Space Agency Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Mission from the perspective of the Remote Sensing Lab at the Universitat Politècnica de Catalunya. We have probably left out some of his many contributions to salinity remote sensing, but we hope that this review will give an idea of the importance of his work. We focus on the following issues: 1) the new accurate measurements of the sea water dielectric constant, 2) the WISE and EuroSTARRS field experiments that helped to define the geophysical model function relating brightness temperature to sea state, 3) the FROG 2003 field experiment that helped to understand the emission of sea foam, 4) GNSS-R techniques for improving sea surface salinity retrieval, 5) instrument characterization campaigns, and 6) the operational implementation of the Processing Centre of Levels 3 and 4 at the SMOS Barcelona Expert Centre.Keywords: SMOS; radiometry; interferometry; calibration; validation; salinity; soil moisture; sea ice; GNSS-R. De campañas de medidas a productos de salinidad: un tributo a las contribuciones de Jordi Font a la mision SMOSResumen: Este artículo resume algunas de las actividades en las que Jordi Font, profesor de investigación y jefe del Departamento de Física y Tecnología Oceanográfica, del Institut de Ciències del Mar (CSIC) en Barcelona, ha estado desarrollando como co-Investigador Principal de la parte de la misión SMOS de la ESA, una misión Earth Explorer, desde la perspectiva del Remote Sensing Lab, de la Universitat Politècnica de Catalunya. Seguramente, estamos olvidando algunas de sus muchas contribuciones a la teledetección de la salinidad, pero esperamos que esta revisión dé una idea de la importancia de su trabajo. Este artículo se focaliza en los siguientes puntos: 1) las medidas de alta calidad de la constante dieléctrica del agua marina, 2) las campañas de medidas WISE y EuroSTARRS que ayudaron a la definición del modelo geofísico relacionando la temperatura de brillo con el estado del mar, 3) la campaña de medidas FROG 2003 que ayudó a entender la emisión de la espuma marina 4) presentación de las técnicas de GNSS-R para la mejora de la recuperación de la salinidad superficial 5) campañas para la caracterización del instrumento y 6) la implantación del centro de procesado operacional de niveles 3 y 4 en el SMOS Barcelona Expert Centre.Palabras clave: SMOS; radiometría; interferometría; calibración; validación; salinidad; humedad del terreno; hielo marino; GNSS-R.Citation/Como citar este artículo: Camps A., Gabarró C., Vall-llossera M., Blanch S., Aguasca A., Torres F., Corbella I., Duffo N., Turiel A., Portabella M., Ballabrera-Poy J., González-Gambau V., Martínez J., Villarino R., Enrique L., Mo...

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“…Based on previous measurement campaigns, the measurement experimental error is expected to be lower than 1 dB [31]- [33].…”

Section: Calibrationmentioning

confidence: 99%

Measurement of the Electromagnetic Field Backscattered by a Fractal Surface for the Verification of Electromagnetic Scattering Models

Ruello

Blanco-Sanchez

Iodice

et al. 2010

IEEE Trans. Geosci. Remote Sensing

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Abstract-Fractal geometry is widely accepted as an efficient theory for the characterization of natural surfaces; the opportunity of describing irregularity of natural surfaces in terms of few fractal parameters makes its use in direct and inverse electromagnetic (EM) scattering theories highly desirable. In this paper, we present an innovative procedure for manufacturing fractal surfaces and for measuring their scattering properties. A cardboard-aluminum fractal surface was built as a representation of a Weiestrass-Mandelbrot fractal process; the EM field scattered from it was measured in an anechoic chamber. A monostatic radarlike configuration was employed. Measurement results were compared to Kirchhoff approximation and small perturbation method closed-form results that were analytically obtained by employing the fractional Brownian motion to model the surface shape. Matching and discrepancies between theories and measurements are then discussed. Finally, fractal and classical surface models are compared as far as their use in the EM scattering is concerned.

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AMIRAS—An Airborne MIRAS Demonstrator

Cited by 25 publications

References 11 publications

Experimental validation of the Corbella's visibility function using HUT-2D and MIRAS

Experimental validation of the Corbella's visibility function using HUT-2D and MIRAS

From field experiments to salinity products: a tribute to the contributions of Jordi Font to the SMOS mission

Measurement of the Electromagnetic Field Backscattered by a Fractal Surface for the Verification of Electromagnetic Scattering Models

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