A5029973303- Radio Astronomy Observations and Technology
- Antenna Design and Optimization
- Superconducting and THz Device Technology
- Space Satellite Systems and Control
- Ionosphere and magnetosphere dynamics
- Gamma-ray bursts and supernovae
- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Millimeter-Wave Propagation and Modeling
- Pulsars and Gravitational Waves Research
- Spacecraft Design and Technology
- Microwave Engineering and Waveguides
- Radio Wave Propagation Studies
- Planetary Science and Exploration
- Advanced MIMO Systems Optimization
- Astrophysics and Cosmic Phenomena
- Antenna Design and Analysis
- Particle accelerators and beam dynamics
- Stellar, planetary, and galactic studies
- Particle Accelerators and Free-Electron Lasers
- Electromagnetic Compatibility and Measurements
- Inertial Sensor and Navigation
- Nuclear Physics and Applications
Osservatorio Astronomico di Cagliari
2017-2024
National Institute for Astrophysics
2017-2024
Arcetri Astrophysical Observatory
2021
Istituto di Radioastronomia di Bologna
2021
Institute of Astrophysics and Space Sciences
2021
Osservatorio Astrofisico di Catania
2021
Agenzia Spaziale Italiana
2021
Trieste Astronomical Observatory
2021
University of Cagliari
2019-2020
Institute of Electrical and Electronics Engineers
2020
The Internet of Things has a high impact on upgrade and transformation the traditional greenhouse agricultural techniques. It is necessary to control environmental factors for obtaining optimum growth conditions crop extend production season get yield. These aspects are fundamental Agriculture 4.0, that uses technology not simply sake innovation but improve address real needs consumers. In this paper, prototype low-cost electronic platform time environment monitoring been designed, developed...
Space debris are orbiting objects that represent a major threat for space operations. The most used countermeasure to face this is, by far, collision avoidance, namely the set of maneuvers allow avoid with debris. Since avoidance is tightly related knowledge state (position and speed), observation orbital key problem. In work bistatic radar configuration named BIRALET (BIstatic RAdar LEO Tracking) detect at 410 MHz, using Sardinia Radio Telescope as receiver antenna. signal-to-noise ratio,...
Context. The Sun is an extraordinary workbench, on which several fundamental astronomical parameters can be measured with high precision. Among these parameters, the solar radius R ⊙ plays important role in aspects, for instance, evolutionary models. Moreover, it conveys information about structure of different layers that compose interior and its atmosphere. Despite efforts to obtain accurate measurements , subject still debated, are puzzling and/or lacking many frequency ranges. Aims. We...
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...
Space debris (SD) is an important problem for space operations and a hot topic surveillance research. A structured network of radar sensors available worldwide, offering vital information about status. Recently, the Sardinia Radio Telescope (SRT), 64-m dish located in Sardinia, Italy, was introduced European plan SD monitoring. Because SRT devoted to radio astronomy applications not optimized echo detection, need SD-dedicated channel has emerged. In this article, we present detailed...
Through the advent of mobile cellular networks number radio base stations installed in urban environments has increased exponentially. As a consequence, level electromagnetic (EM) field at same pace, sometimes approaching limits set by national rules. The first step compliance test campaign is estimation, mainly close to stations. In this article, estimation EM generated UHF station presented. A rephrasing COST 231 - Walfisch-Ikegami model used evaluate path loss distances greater than 20 m...
The population of space debris in near-Earth is continuously growing and it represents a serious problem for active satellites spacecraft. A performant ground-based space-based network sensors necessary surveillance consequently to prevent new collisions monitoring atmospheric reentry these objects. This paper illustrates the possible role Italian novel bi-static radar sensor, named BIRALET, resident objects tracking. main characteristics receiver system, Sardinia Radio Telescope with its...
Space debris is a term for all human-made objects orbiting the Earth or reentering atmosphere. The population of space continuously growing and it represents potential issue active satellites spacecraft. New collisions fragmentation could exponentially increase amount so level risk represented by these objects. principal technique used monitoring, in Low Orbit (LEO) between 200 km 2000 altitude, based on radar systems. BIRALET system one main Italian radars involved resident observations. It...
Space debris is internationally recognized as a planetary threat. Efforts to enhance the worldwide radar monitoring networks have been intensified in last years. Among new radars employed for observations, one of most promising Bistatic Radar Low Earth Orbit (LEO) Tracking (BIRALET), which employs Sardinia Radio Telescope receiving segment. The (SRT) has recently proven be reliable instrument space and, this purpose, over years undergone some substantial modifications order able rise status...
We present a new solar radio imaging system implemented through the upgrade of large single-dish telescopes Italian National Institute for Astrophysics (INAF), not originally conceived observations. During development and early science phase project (2018-2020), we obtained about 170 maps entire disk in 18-26 GHz band, filling observational gap field at these frequencies. These images have typical resolutions 0.7-2 arcmin range brightness temperature sensitivity <10 K. Accurate calibration...
The Sardinia Radio Telescope is a quasi-Gregorian system with shaped 64 m diameter primary reflector and 7.9 secondary reflector. It was designed to operate high efficiency across the 0.3-116 GHz frequency range. telescope equipped cryogenic coaxial dual-frequency L-P band receiver, which covers portion of P-band (305-410 MHz) L-band (1300-1800 MHz). Although this receiver has been used for years in its original design, satisfactory results, it presents some parts that could be upgraded...
Space debris represent a major risk for every spacecraft and satellite. In fact, other than cause serious damages to these structures, new collisions could exponentially increase the amount of so level threat represented by objects. To avoid impacts, monitoring space environment with space-based ground-based measurement campaigns is necessary. The can be implemented optical or radar technologies. this paper upgrade Italian BIRALES system debris, that initially performed only Doppler...
The population of space debris is continuously growing and it represents a potential problem for satellites spacecraft. In fact, new collisions could exponentially rise the number so level threat represented by these objects. To prevent collisions, monitoring environment necessary. For this reason, radar measurements are relevant, in particular to observe Space Debris Low Earth Orbit. recent years, Sardinia Radio Telescope, fully steerable wheel-and-track 64-m antenna, located (Italy), has...
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 report on results of electromagnetic co-simulations and beam-pattern optimization the C-band PHAROS (PHased Arrays for Reflector Observing Systems) Phased Array Feed (PAF) from primary focus 64-m diameter Sardinia Radio Telescope (SRT). calculated radiation patterns a sub-array 24 Vivaldi array elements propagated them through reflector. present SRT far-field beam obtained by Iinearly combining different PAF configurations with uniform weights. Furthermore, we used Conjugate Field...
Radio frequency interference (RFI) represents all unwanted signals detected by radio receivers of a telescope. Unfortunately, the presence RFI is significantly increasing with technological development wireless systems around world. For this reason, measurement campaigns are periodically necessary to map scenario The Sardinia Telescope (SRT) an Italian instrument that was designed operate in wide band between 300 MHz and 116 GHz. One telescope coaxial cryogenic receiver covered portion P L...
In this work, we present preliminary results of radar observations near-Earth Objects (NEOs) carried out by European radio telescopes in the framework Space Agency (ESA) project “NEO observation concepts for systems”, which was aimed to derive functional requirements a system, evaluate available assets perform NEO and carry test campaigns. first part project, performance analysis possible planetary system. Instrumental features, as much issues like impact weather conditions on signal...
The knowledge of the electromagnetic field levels generated by radio base stations present in an urban environment is a relevant aspect for propagations and coverage issues, as well compliance to national regulations. Despite growing interest novel fifth generation (5G) technology, several aspects related investigation propagation Global System Mobile Communication (GSM), third (3G), fourth (4G) mobile systems peculiar non-rural environments may be improved. To account irregular geometries...
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.
We describe the architecture of a room-temperature C-band Phased Array Feed (PAF) demonstrator based on Radio Frequency System-on-Chip (RFSoC) for radio astronomy application. The instrument operates across 4.75-6.00 GHz RF band (C-band). section includes compact module an 8×8 array dual-polarization antennas integrated with MMIC (Monolithic Microwave Integrated Circuit) Low Noise Amplifiers (LNAs). A subset 32 elements one two polarization channels 128 are connected to LNAs, while rest...
One of the most important objectives solar physics is physical understanding atmosphere, structure which also described in terms density (N) and temperature (T) distributions atmospheric matter. Several multi-frequency analyses show that characteristics these are still debated, especially for outer coronal emission. We aim to constrain T N atmosphere through observations centimetric radio domain. employ single-dish from two INAF telescopes at K-band frequencies (18 - 26 GHz). investigate...
Context. One of the most important objectives solar physics is to gain a physical understanding atmosphere, whose structure can also be described in terms density ( N ) and temperature T distributions atmospheric matter. Several multi-frequency analyses have shown that characteristics these are still under debate, especially for outer coronal emission. Aims. We aim constrain atmosphere through observations centimetric radio domain. employed single-dish from two INAF telescopes at K -band...