A5079463458- Radio Astronomy Observations and Technology
- Antenna Design and Optimization
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Iterative Learning Control Systems
- Soil Moisture and Remote Sensing
- Microwave Engineering and Waveguides
- GNSS positioning and interference
- Solar and Space Plasma Dynamics
- Planetary Science and Exploration
- Pulsars and Gravitational Waves Research
- Space Science and Extraterrestrial Life
- Geophysics and Gravity Measurements
- Cosmology and Gravitation Theories
- Advanced machining processes and optimization
- Control Systems in Engineering
- Electromagnetic Compatibility and Measurements
- Astronomy and Astrophysical Research
- Robotic Path Planning Algorithms
- Space exploration and regulation
- Particle Accelerators and Free-Electron Lasers
- Dynamics and Control of Mechanical Systems
- Space Satellite Systems and Control
- Robotics and Sensor-Based Localization
- Aerospace Engineering and Energy Systems
National Institute for Astrophysics
2014-2023
Istituto di Radioastronomia di Bologna
2003-2023
Arcetri Astrophysical Observatory
2018-2021
Osservatorio Astronomico di Cagliari
2021
Institute of Astrophysics and Space Sciences
2021
Osservatorio Astrofisico di Catania
2021
Agenzia Spaziale Italiana
2021
Trieste Astronomical Observatory
2021
Bologna Research Area
2003
Sapienza University of Rome
1991-2002
In the period 2012 June - 2013 October, Sardinia Radio Telescope (SRT) went through technical commissioning phase. The characterization involved three first-light receivers, ranging in frequency between 300MHz and 26GHz, connected to a Total Power back-end. It also tested employed telescope active surface installed main reflector of antenna. instrument status performance proved be good agreement with expectations terms panels alignment (at present 300 um rms improved microwave holography),...
The design and development process for the Square Kilometre Array (SKA) radio telescope’s Low Frequency Aperture component was progressed during SKA pre-construction phase by an international consortium, with goal of meeting requirements a critical review. As part full-sized prototype ‘station’ deployed – Verification System 1 (AAVS1). We provide system overview describe commissioning results AAVS1, which is low frequency telescope 256 dual-polarisation log-periodic dipole antennas working...
A signal processing hardware platform has been developed for the Low Frequency Aperture Array component of Square Kilometre (SKA). The board, called an Analog Digital Unit (ADU), is able to acquire and digitize broadband (up 500[Formula: see text]MHz bandwidth) radio-frequency streams from 16 dual polarized antennas, channel data then combine them flexibly as part a larger beamforming system. It envisaged that there will be more than 8000 these platforms in first phase SKA, so particular...
We present the status of Sardinia Radio Telescope (SRT) project, a new general purpose, fully steerable 64 m diameter parabolic radiotelescope capable to operate with high efficiency in 0.3-116 GHz frequency range. The instrument is result scientific and technical collaboration among three Structures Italian National Institute for Astrophysics (INAF): Astronomy Bologna, Cagliari Observatory (in Sardinia,) Arcetri Astrophysical Florence. Funding agencies are Ministry Education Scientific...
A large-bandwidth, state-of-the-art multi-feed receiver has been constructed to be used on the new 64 m Sardinia Radio Telescope (SRT) (http://www.srt.inaf.itl), an antenna aiming work from 300 MHz 100 GHz with almost continuous frequency coverage. The goal of this is speed up survey sky high sensitivity in a band that very interesting radio astronomers. In meantime, erection finalized, and mounted Medicina 32 tested (http://www.med.ira.inaf.itl). We present complete description system,...
We present the status of Sardinia Radio Telescope (SRT) and its forthcoming update planned in next few years. The post-process scenario upgraded infrastructure will allow national international scientific community to use SRT for study Universe at high radio frequencies (up 116 GHz), both single dish interferometric mode. A telescope like SRT, operating frequencies, represents a unique resource community. be ideal mapping quickly with relatively angular resolution extended emissions...
The signal processing firmware that has been developed for the Low Frequency Aperture Array component of Square Kilometre is described. implemented on a dual FPGA board, capable streams from 16 polarization antennas. Data includes channelization sampled data each antenna, correction instrumental response and geometric delays formation one or more beams by combining aligned streams. channelizer uses an oversampling polyphase filterbank architecture, allowing frequency continuous input without...
A UAV-mounted radio-frequency transmitter is proposed as a known reference field source to perform set of functional tests on aperture arrays. The experimental results obtained complete prototypes (end-to-end) and sub-assemblies provide good confidence both amplitude timing verification.
The Sardinia Radio Telescope is approaching to its official inauguration. Nowadays, the technical staff accomplishing last remaining activities set up and integrate microwave receivers, digital processing systems all equipment necessary reach a top level in international scenario of large radio telescopes. Even if telescope still along commissioning, SRT has already performed first astronomical detection. This early scientific result opens exciting perspectives for time when will be full...
We describe the design and architecture of PHAROS2, a cryogenically cooled 4-8 GHz Phased Array Feed (PAF) demonstrator with digital beamformer for radio astronomy application. The instrument will be capable synthesizing four independent single-polarization beams by combining 24 active elements an array Vivaldi antennas. upgrade PHAROS (PHased Arrays Reflector Observing Systems), features: a) commercial cryogenic LNAs state-of-the-art performance, b) "Warm Section" signal filtering,...
In this article, we present the design and performances of radio receiver system installed at Sardinia Radio Telescope (SRT). The three receivers planned for first light Sardinian have been in four possible focus positions. A dual linear polarization coaxial that covers two frequency bands, P-band (305-410 MHz) L-band (1.3-1.8 GHz) is primary focus. mono-feed High C-band (5.7-7.7 beam waveguide foci. multi-beam (seven beams) K-band (18- 26.5 Gregorian Finally, give an overview about...
A novel digital hardware platform has been designed for the Low Frequency Aperture Array (LFAA) component of Square Kilometre (SKA). This board, called Analog Digital Unit (ADU), is a 6U board containing sixteen dual-inputs to Converters (ADC) and two Field Programmable Gate (FPGA) devices, capable digitizing processing 32 RF input signals. We present main features signal firmware that developed LFAA. Although ADU conceived mainly low frequency band (50-350 MHz), its use proved effective...
This paper describes the design, fabrication, and test results of a room temperature multi-channel heterodyne receiver operating across 2.3–8.2 GHz radio frequency (RF) band. Such “Warm Section” (WS) is part phased arrays for reflector observing systems 2 (PHAROS2), C-band array feed (PAF) demonstrator with digital beamformer astronomy application. The WS cascaded to PHAROS2 cryostat, which includes an Vivaldi antennas low noise pre-amplification stages. can handle up 32 RF signals and, each...
We describe the development of a multi-channel "warm receiver section" (WS) and digital beamformer for PHAROS2 Phased Array Feed (PAF), PAF demonstrator radio astronomy application across 4-8 GHz frequency (RF) band. The is based on an array 10×11 dual-polarization Vivaldi antennas cryogenically cooled at 20 K along with low noise amplification modules (LNAs). WS can process signals from subset 24 antenna elements by downconverting them to intermediate (IF) range, 375-650 MHz, suitable...
We describe the design, fabrication and test results of a multi-channel heterodyne receiver operating at room temperature across 2.3-8.2 GHz Radio Frequency (RF) band. Such "Warm Section" (WS) is part Phased Array Feed (PAF) demonstrator that being built for radio astronomy application. The WS cascaded to PAF cryogenic section incorporates an antenna array with low noise pre-amplification stages. consists four rack-mountable modules, each which can process eight RF inputs. Four modules are...
The SKA LOW telescope is an interferometer composed of 512 stations. Each station consists 256 electronically steered antennas. Low Frequency Aperture Array the portion SKA-LOW including antennas and related electronics. LFAA signal processing chain amplifies, transports combines signals from composing each into a coherent beam. Beamforming performed in frequency domain, with stringent requirements on bandpass flatness, linearity RFI contaminated spectral region, allowed degradation. We...
The Sardinia Radio Telescope is going through a major upgrade aimed at observing the universe up to 116 GHz.A budget of 18.700.000E has been awarded Italian National Institute Astrophysics acquire new state-of-the-art receivers, back-end, and high-performance computing, develop sophisticated metrology system infrastructure laboratories.
Learning control is applied to end-point trajectory tracking of a flexible robot link, performing repetitive tasks. The model an experimental prototype given and the main results from frequency domain analysis iterative learning controllers are recalled. Several possibilities application this methodology structures presented extensively tested by simulation. They differ for level detail link which ranges exact very rough approximation, does not retain its nonminimum phase properties.< <ETX...
The measure of the faint polarized signal Cosmic Microwave Background (few percent CMB Anisotropy) requires instruments with very low contamination from systematic effects, high stability and sensitivity. BaR-SPOrt experiment, in sharing SPOrt project on ISS, is based analog correlation receivers components custom designed to match all these requirements. Here we present architecture, design analysis status realization 32 GHz receiver.