A5003735939- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Optical Systems and Laser Technology
- Advanced optical system design
- Stellar, planetary, and galactic studies
- Solar and Space Plasma Dynamics
- Optical Wireless Communication Technologies
- CCD and CMOS Imaging Sensors
- Solar Thermal and Photovoltaic Systems
- Traffic Prediction and Management Techniques
- Astronomical Observations and Instrumentation
- Photovoltaic System Optimization Techniques
- Nuclear Physics and Applications
- Spacecraft and Cryogenic Technologies
- Cultural and political discourse analysis
- Traffic control and management
- Solar Radiation and Photovoltaics
- Atmospheric Ozone and Climate
- Social Sciences and Policies
- Calibration and Measurement Techniques
- solar cell performance optimization
- Psychological Treatments and Disorders
- Optical Coherence Tomography Applications
- Non-Destructive Testing Techniques
- Legal processes and jurisprudence
Instituto de Astrofísica de Canarias
2012-2024
Universidad de La Laguna
2023
Universidad Alas Peruanas
2021
National University of Saint Anthony the Abbot in Cuzco
2021
Universidad Andina Néstor Cáceres Velásquez
2021
Comunidad de Madrid
2011
An increasing number of jurisdictions across the United States are exploring level service (LOS) for multiple travel modes, in part as a result release Highway Capacity Manual 2010 (HCM 2010), well an increased focus on complete streets policies. One most important questions being asked by these is whether new multimodal LOS methods sensitive enough to inform transportation investments, mitigate impacts, and prioritize future projects. For this paper, professionals (public, private,...
European Solar Telescope (EST) represents the largest research infrastructure projected in field of solar astrophysics. It is a 4-meter class telescope currently design phase. Within this phase, an essential objective to analyze control strategy axes achieve accurate sun trajectory tracking. This paper presents cascade scheme based on proportional-integral (PI) controllers specifically designed for elevation and azimuth EST. The strategy, which employs nested position-velocity loops, devised...
The correction of the phase variations induced by atmospheric turbulence is one most complex problems that an Adaptive Optics (AO) System must deal with, as it calculate properties all atmosphere traversed light from several measures taken ground-based telescopes. Traditional reconstructors systems used in AO are based on computational algorithms where its reconstruction quality improves with number made telescopes’ sensors. That means sensors getting greater and their corresponding higher...
We report the results on EMIR<sup>1</sup> (Espectrógrafo Multiobjeto Infra-Rojo) performances after commissioning period of instrument at Gran Telescopio Canarias (GTC). EMIR is one first common user instruments for GTC, 10 meter telescope operating Roque de los Muchachos Observatory (La Palma, Canary Islands, Spain). being built by a Consortium Spanish and French institutes led Instituto Astrofísica (IAC). primarily designed to be operated as MOS in K band, but offers wide range observing...
EMIR is one of the first common user instruments for GTC, 10 meter telescope operating at Roque de los Muchachos Observatory (La Palma, Canary Islands, Spain). being built by a Consortium Spanish and French institutes led Instituto Astrofísica Canarias (IAC). primarily designed to be operated as MOS in K band, but offers wide range observing modes, including imaging spectroscopy, both long slit multiobject, wavelength 0.9 2.5 μm. This contribution reports on results achieved so far during...
The European Solar Telescope (EST) is a 4.2-m telescope which has been redesigned with fully integrated Multi-Conjugate Adaptive Optics (MCAO) into the optical path right after EST primary mirror. current baseline configuration considers four altitude Deformable Mirrors (DM) conjugated to 5, 9, 12 and 20 km above entrance pupil an Secondary Mirror (ASM) pupil. wavefront sensing will be performed by set of correlation-based Shack Hartmann sensors (WFS) combining on-axis High-Order WFS (HOWFS)...
Since the beginning of development Gran Telescopio Canarias (GTC), an Adaptive Optics (AO) system was considered necessary to exploit full diffraction-limited potential telescope. The GTC AO designed during last years is based on a single deformable mirror conjugated telescope pupil, and Shack-Hartmann wavefront sensor with 20 x subapertures, using OCAM2 camera. GTCAO will provide corrected beam Strehl Ratio (SR) 0.65 in K-band bright natural guide stars. Most subsystems have been...
European Extremely Large Telescope (E-ELT) based in 984 primary mirror segments achieving required optical performance; they must position relatively to adjacent with relative nanometer accuracy. CESA designed M1 Position Actuators (PACT) comply demanding performance requirements of EELT. Three PACT are located under each segment controlling three out the plane degrees freedom (tip, tilt, piston). To achieve a high linear accuracy long operational displacements, uses two stages series. First...
The Gran Telescopio Canarias Adaptive Optics (GTCAO) is a single-conjugated post-focal system with Shack Hartmann wavefront sensor working at visible wavelength and one Deformable Mirror (DM) conjugated to the pupil. GTCAO does not include fast tip-tilt mirror in its optical bench so it relies on telescope secondary (M2) correct low frequency offload DM. This paper describes specific details of software implementation control for GTCAO, analyses computational needs, presents series tests...
The Gran Telescopio Canarias Adaptive Optics (GTCAO) will measure the wavefront with a Shack-Hartmann sensor. This sensor (WFS) is based on CCD220, an electron-multiplying CCD (EMCCD) that achieves sub-electron readout noise, increasing signal to noise ratio when weak natural guide stars (NGS) are used as reference. GTCAO start its operation in telescope NGS, using only one sensor, and later it incorporate Laser Guide Star (LGS) consequently second WFS, also EMCCD. Both EMCCDs third spare,...
EMIR is a wide-field camera and multi-object, intermediate resolution near-infrared spectrograph for the GTC telescope. cryogenic instrument whose cooling system based on four two-stage CCCs' Leybold Coolpower 5/100 capacity 100W@80K, in 1st stage, 5W@20K, 2nd operated directly by two compressors dual mode (two cold heads each compressor). During verification phase some phenomena affecting efficiency have been observed. In consequence, possible influences of temperature water unit...
The Adaptive optics for GTC is a single conjugated post focal AO system placed in the Nasmyth platform over static optical table. It has been designed initially natural guide star and later project phase adapted to one laser star. composed of following subsystems: wavefront corrector, sensor, structure, calibration test camera. This paper presents hardware electronics support all these subsystems including real time control introduction.
The European Solar Telescope (EST) aims to become the most ambitious ground-based solar telescope in Europe. This paper summaries planned architecture, software practices adopted at moment for development environment and future lines. EST has a mix of proven from existing telescopes that are suited requirements with new systems, CI/CD agile methodologies among others.
The European Solar Telescope (EST) is a 4-m class-solar telescope that will become part of the next generation groundbased facilities. Located at "Observatorio del Roque de los Muchachos" in La Palma (Spain), it be aimed to study magnetic connectivity solar atmosphere with high spatial and temporal resolution. EST optical design has been optimized during preliminary phase maximize throughput, balance instrumental polarization reduce image rotation due change orientation operation. system...
The GTC Adaptive Optics (GTCAO) instrument will provide single-conjugate natural guide star adaptive optics capabilities to the FRIDA installed in telescope.The implements a real time closed loop with Shack-Hartmann wavefront sensor and deformable mirror.Besides that standard operation, sends information for performing fine control of telescope primary secondary mirrors desaturating mirror optimizing its performance.This paper presents software design Real Time Control System charge...
EMIR is the NIR imager and multiobject spectrograph being built as a common user instrument for 10-m class GTC. Big cryogenic instruments demand reliable design specific hardware software to increase its safety productivity. vacuum, cooling heating systems are monitored partially controlled by Programmable Logic Controller (PLC) in industrial format with touch screen. The PLC aids operator maintenance tasks recovering autonomously vacuum if required or proposing preventive actions....
A research has been carried out in two-lane highways the Madrid Region to propose an alternative model for speed-flow relationship using regular loop data. The is different shape and, some cases, slopes with respect contents of Highway Capacity Manual (HCM). proposed a mountainous area road, something which HCM does not provide explicitly solution. problem mountain road high flows access popular recreational discussed, and solutions are proposed. Up 7 one-way sections have selected, aiming...
The European Solar Telescope (EST) is a 4.2-m solar telescope, based on an aplanatic Gregorian configuration with alt-azimuthal mount. This contribution presents the status of EST and describes baseline for preliminary design Structure (Telescope Mount), Enclosure Pier. It also introduces systems engineering, model tools. In addition, it explains rationale main specifications. optical has undergone major changes since conceptual design. M2 Assembly become Adaptive Secondary Mirror, f-number...
This contribution presents the structural analysis that followed preliminary design specifications of European Solar Telescope (EST). EST is a 4-metre class telescope based on an aplanatic Gregorian configuration with alt-azimuthal mount. The optical has undergone several changes since end conceptual phase. A finite element model (FEM) was developed to verify performance new design. includes elevation structure, azimuth platform, pier and ground at observatory site. Two different...