Mr. Ángel Luis Valverde Guijarro Profile

Ángel Luis Valverde Guijarro

at Instituto Nacional de Técnica Aeroespacial

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Author

Publications (8)

Proceedings Article | 23 August 2024 Poster + Paper

Focal plane assemblies (FPAs) assembly, integration, and verification (AIV): from small to large array detectors

J. Cabrero, A. Valverde, G. Ramos, M. Rodrigo, L. González, T. Belenguer

Proceedings Volume 13092, 130924N (2024) https://doi.org/10.1117/12.3020616

KEYWORDS: Staring arrays, Charge-coupled devices, Sensors, Fermium, Optical alignment, Detector arrays, Frequency modulation, Raman spectroscopy, Manufacturing, Equipment

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Proceedings Article | 23 August 2024 Poster + Paper

INTA as test house for PLATO: telescopes TVAC testing and calibration set-up preparation and EM results

E. Borreguero, G. Ramos, G. Mercant, F. Montoro, M. Rodrigo, A. Valverde, M. Sierra , L. Espinosa, A. Santiago, F. Conde, J. Saiz, N. Gorius, C. Arena, B. Vandenbussche, P. Eigmüller, C. Paproth, F. Molendini, J. Lorenzo

Proceedings Volume 13092, 130924S (2024) https://doi.org/10.1117/12.3023918

KEYWORDS: Collimators, Vacuum, Control systems, Connectors, Tunable filters, Calibration, Optical fibers, Telescopes, Design, Optical filters

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Proceedings Article | 23 August 2024 Poster + Paper

INTA as test house for PLATO: telescope flight model TVAC testing and calibration first results

F. Montoro, G. Ramos, L. Espinosa, E. Borreguero, G. Mercant, M. Rodrigo, A. Valverde, M. Sierra, A. Santiago, F. Conde, J. Saiz, N. Gorius, C. Arena, B. Vandenbussche, P. Eigmüller, C. Paproth, F. Molendini, J. Lorenzo

Proceedings Volume 13092, 130924T (2024) https://doi.org/10.1117/12.3023922

KEYWORDS: Control systems, Charge-coupled devices, Vacuum, Telescopes, Point spread functions, Content addressable memory, Temperature metrology, Cameras, Thermography, Stars

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Proceedings Article | 23 August 2024 Poster + Paper

Emergency protocol activation at INTA as test house for PLATO: saving PLATO CAMs under unexpected events

A. Santiago, G. Ramos, F. Conde, R. Canchal, E. Borreguero, F. Montoro, M. Rodrigo, A. Valverde, M. Sierra, L. Espinosa, J. Saíz, N. Gorius, C. Arena, N. Auricchio, B. Vandenbussche, P. Eigmüller, C. Paproth, F. Molendini, J. Lorenzo, J. Huesler

Proceedings Volume 13099, 1309920 (2024) https://doi.org/10.1117/12.3023927

KEYWORDS: Content addressable memory, Vacuum, Telescopes, Vacuum chambers, Cameras, Cryogenics, Temperature metrology, Sensors, Product safety, Testing and analysis, Space telescopes

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Proceedings Article | 27 August 2022 Poster + Paper

PLATO focal plane assembly (FPA) qualification model (QM): an innovative real-time metrology

J. Cabrero, A. Valverde, G. Ramos, M. Rodrigo, L. Gómez-Zazo, Luis González, J. Mas-Hesse, A. Balado, M. Pajas, P. Gallego, M. Alcacera, I. Catalán, D. Escribano, I. Muñoz, S. Martin

Proceedings Volume 12180, 121804Q (2022) https://doi.org/10.1117/12.2629786

KEYWORDS: Staring arrays, Charge-coupled devices, Aluminum nitride, Optical alignment, Metrology, Manufacturing, Iterated function systems, Content addressable memory, Titanium, Silicon

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

On the optical alignment of the PLATO cameras

P. Royer, L. Clermont, M. Pertenais, A. Baeke, R. Huygen, J. De Ridder, S. Regibo, M. Dami, B. Vandenbussche, A. Belen Balado Margeli, J. Farinato, D. Greggio, Y. Levillain, D. Magrin, L. Marafatto, M. Pajas, G. Ramos Zapata, A. L. Valverde Guijarro, V. Viotto

Proceedings Volume 11443, 114434Q (2020) https://doi.org/10.1117/12.2560690

KEYWORDS: Optical alignment, Cameras, Optical testing, Temperature metrology, Exoplanets, Space operations, Objectives, Planets, Telescopes, Integrated optics

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Proceedings Article | 9 September 2019 Presentation + Paper

Planetary transits and oscillation of stars (PLATO) focal plane assembly (FPA): prototype assembly and integration verification

G. Ramos , A. Valverde Guijarro, M. Rodrigo, M. Sierra, L. Gómez, E. Borreguero, L. Álvarez, A. Manjón, A. Balado, D. Barrado, J. Mas

Proceedings Volume 11115, 1111508 (2019) https://doi.org/10.1117/12.2530549

KEYWORDS: Staring arrays, Charge-coupled devices, Stars, Cameras, Microscopes, Prototyping, Telescopes, Optical alignment, Planets, Exoplanets

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Proceedings Article | 4 October 2017 Paper

Atmospheric lidar co-alignment sensor: flight model electro-optical characterization campaign

Ángel Luis Valverde Guijarro, Tomás Belenguer Dávila, Hugo Laguna Hernandez, Gonzalo Ramos Zapata

Proceedings Volume 10429, 104290D (2017) https://doi.org/10.1117/12.2278734

KEYWORDS: Electro optical modeling, Clouds, Atmospheric modeling, Electro optical sensors, LIDAR, Sensors, Aerosols, Electro optics, Atmospheric particles, Mirrors

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Due to the difficulty in studying the upper layer of the troposphere by using ground-based instrumentation, the conception of a space-orbit atmospheric LIDAR (ATLID) becomes necessary. ATLID born in the ESA’s EarthCare Programme framework as one of its payloads, being the first instrument of this kind that will be in the Space. ATLID will provide vertical profiles of aerosols and thin clouds, separating the relative contribution of aerosol and molecular scattering to know aerosol optical depth. It operates at a wavelength of 355 nm and has a high spectral resolution receiver and depolarization channel with a vertical resolution up to 100m from ground to an altitude of 20 km and, and up to 500m from 20km to 40km. ATLID measurements will be done from a sun-synchronous orbit at 393 km altitude, and an alignment (co-alignment) sensor (CAS) is revealed as crucial due to the way in which LIDAR analyses the troposphere. As in previous models, INTA has been in charge of part of the ATLID instrument co-alignment sensor (ATLID-CAS) electro-optical characterization campaign. CAS includes a set of optical elements to take part of the useful signal, to direct it onto the memory CCD matrix (MCCD) used for the co-alignment determination, and to focus the selected signal on the MCCD. Several tests have been carried out for a proper electro-optical characterization: CAS line of sight (LoS) determination and stability, point spread function (PSF), absolute response (AbsRes), pixel response non uniformity (PRNU), response linearity (ResLin) and spectral response. In the following lines, a resume of the flight model electrooptical characterization campaign is reported on. In fact, results concerning the protoflight model (CAS PFM) will be summarized. PFM requires flight-level characterization, so most of the previously mentioned tests must be carried out under simulated working conditions, i.e., the vacuum level (around 10^-5 mbar) and temperature range (between 50°C and -30°C) that are expected during ATLID Space operation.

Showing 5 of 8 publications

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