Paolo Zoccarato | Curtin University (original) (raw)
Papers by Paolo Zoccarato
Proceedings of the Institute of Navigation ... International Technical Meeting, Feb 14, 2022
Journal of Guidance Control and Dynamics, May 21, 2023
Nowadays, deep-space navigation strongly depends on ground segments, e.g., ESA’s European Space T... more Nowadays, deep-space navigation strongly depends on ground segments, e.g., ESA’s European Space Tracking and NASA’s Deep Space Network. However, the positioning accuracy of ground-based navigation systems decreases with the distance from the Earth, significantly increasing the positioning uncertainty for interplanetary missions. Furthermore, ground-based navigation systems require extensive ground operations, and their limited bandwidth could lead to a point of full utilization in the future. The aim of this work is to introduce—for the first time—the concept of space navigation by optical pulsars, a novel technology that aims at overcoming the limits of ground-based navigation systems. This paper presents, first, an introduction to satellite navigation by using pulsars, discussing on the physical and timing properties of optical pulsars. Then, it investigates on the timing techniques allowing to reconstruct, process, and make use of a pulsar signal, leading to a position estimation. Finally, it reports the results of a clock error estimation performed on ground with real pulsar data and a first estimation of the achievable positioning accuracy in a simulated highly elliptical orbit around the Earth.
Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023)
Proceedings of a meeting, Feb 23, 2021
(Presentation slides only) The Galileo system is a constellation of 30 satellites with a global g... more (Presentation slides only) The Galileo system is a constellation of 30 satellites with a global ground infrastructure. Already 26 satellites have been launched with an additional 12 on order. Initial services started on 15 Dec 2016. This presentation will provide an update on the current status of the Galileo System, the achieved performances to date and touch on the new developments which could be of interest for the timing community, such as I/NAV message improvements for faster signal acquisition, Open Service Navigation Message Authentication (OS-NMA) for authenticating the navigation message, Commercial Access Service (CAS) capabilities to encrypt the E6c signal and High Accuracy Service (HAS) to offer 20 cm position accuracy. The presentation will zoom into the achieved UTC and GPS-to-Galileo Time Offset dissemination performance. Additional, the presentation will provide some expected benefits for timing users of the Galileo HAS, such as synchronisation of user equipment. An outlook will be given to some future studied improvements to increase the robustness of the Galileo timekeeping system.
Proceedings of SPIE, May 7, 2009
In the great majority of the cases, present astronomical observations are realized analyzing only... more In the great majority of the cases, present astronomical observations are realized analyzing only first order spatial or temporal coherence properties of the collected photon stream. However, a lot of information is "hidden" in the second and higher order coherence terms, as details about a possible stimulated emission mechanism or about photon scattering along the travel from the emitter to the telescope. The Extremely Large Telescopes of the future could provide the high photon flux needed to extract this information. To this aim we have recently studied a possible focal plane instrument, named QuantEYE, for the 100 m OverWhelmingly Large Telescope of the European Southern Observatory. This instrument is the fastest photon counting photometer ever conceived, with an array of 100 parallel channels operating simultaneously, to push the time tagging capabilities toward the pico-second region. To acquire some experience with this novel type of instrumentation, we are now in the process of realizing a small instrument prototype (AquEYE) for the Asiago 182 cm telescope, for then building a larger instrument for one of the existing 8-10 m class telescopes. We hope that the results we will obtain by these instruments will open a new frontier in the astronomical observations.
Proceedings of SPIE, Apr 23, 2010
ABSTRACT Iqueye is a high speed astronomical photon counting device, tested at the ESO 3.5 m New ... more ABSTRACT Iqueye is a high speed astronomical photon counting device, tested at the ESO 3.5 m New Technology Telescope in La Silla (Chile). The optics splits the telescope pupil into four portions each feeding a Single Photon Avalanche Diode. A time-to-digital converter board time tags the pulses from the 4 channels, and the times sent to a storage device. The instrument is capable of running continuously up to a rate of 8 MHz, with an absolute rms accuracy better that 0.5 ns. The time is obtained by means of a rubidium clock referenced to UTC through the GPS signal. The paper describes the analysis performed on data taken on bright stars in order to perform 'quantum-like' measurements in the photon stream, namely the calculation of the second-order correlation functions g(2)(x,0) and g(2)(0,t). To this end, an ad hoc software correlator has been developed. Taking advantage of the pupil-splitting concept, the calculation of g(2)(x,0) has been made between the sub-apertures of the telescope, as a first step to verify the zero-baseline correlation coefficient in an Hanbury-Brown Twiss intensity interferometer [1]. Our experiment demonstrates the value of an Iqueye-like instrument applied to larger telescopes, like the four 8 m VLTs or the two 10m Keck telescopes, and even more the sub-pupils of the future 42 m E-ELT for a novel exploitation of the photon stream from celestial objects.
Proceedings of the Institute of Navigation ... International Technical Meeting, Feb 14, 2022
Proceedings of the Satellite Division's International Technical Meeting, Nov 3, 2017
Satellite orbit determination is a fundamental information for many space missions, several requi... more Satellite orbit determination is a fundamental information for many space missions, several requiring a high level of orbit accuracy. Nowadays the Precise Orbit Determination (POD) is the technique routinely used on ground for computing the orbit of LEO missions, especially when the position of the satellite center of mass has to be known at cm level (e.g.: GRAS, Sentinels, SWARM, GOCE, etc.). The current POD approach must be performed only on ground in post-processing. The orbit accuracy achieved with the POD is typically between 0.1 mm/s to 1 mm/s for the velocity. Despite being in line with mission needs, the post-processing limitation is preventing its use for more advanced applications that require high accuracy in real-time, such as formation flying, autonomous docking and rendezvous, increased spacecraft autonomy, etc. This contribution investigates how to overcome the real-time limitations and shows that real-time Precise Onboard Orbit Determination (P2OD) could be achieved in the near future, bringing the current ground PPP (Precise Point Positioning) and PPP-RTK (Precise Point Positioning -Real Time Kinematic) concept to space users. The target real-time orbit accuracy to be achieved with this approach is 10 cm RMS 3D (1 mm/s for velocity). Different algorithms have already been developed for onboard orbit determination, ranging from a least square approach to Extended or Unscented Kalman Filtering (EKF, UKF). Usually the initial position is provided through a Single Point Positioning (SPP) technique, using only the pseudorange measurements. The SPP solution can be smoothed by fitting a dynamic model. These onboard algorithms allow to reach an orbital velocity accuracy (3D RMS) at m/s or cm/s level ([23], [24], [25], [26] and [27]). Several studies ([28], [29] and [30]) have also investigated the optimization of the force models acting on the satellites and the related parameters for propagating the orbit with the electronics onboard a LEO satellite. The main limitation for such onboard OD algorithms is the lack of precise ephemeris and clock products for the GNSS satellites in real-time. GNSS receivers in space can use techniques and concepts adoptable by GNSS receiver on ground. There are at least two main concepts for real-time high accuracy positioning computation based on GNSS: RTK and PPP. RTK relies on use of ground stations in the proximity of the user receiver, therefore cannot be considered viable from space users. PPP (and its evolution, the PPP-RTK) is based on the broadcast of precise corrections (mainly precise orbits and clocks, but also a precise ionospheric model and, for PPP-RTK, delta phase correction for performing Integer Ambiguity Resolution on the rover) through different communication channels (e.g., via geostationary satellites, GSM, Internet). This study addresses two main types of communication channels for providing precise orbit and clock corrections of the GNSS satellites: the dedicated broadcast and the global broadcast channels. The dedicated broadcast channel assumes that each GNSS satellite (e.g.: GPS or Galileo) broadcasts its own precise corrections for orbits and clocks. Such a condition could be achieved with an improvement of the current broadcasted ephemerides and clocks (via standard navigation message) or via a dedicated communication channel provided by the GNSS satellites that goes on top of the broadcasted navigation message. In this scenario the available bandwidth is normally limited, so the amount of corrections that can be disseminated is limited (allowing to transmit only the corrections for the satellite itself or a small group of nearby satellites) and there is a need for a constant communication contact from the uplink stations to all or a high number of the GNSS satellites. Modern GNSS systems are very close to provide the infrastructure to enable the dedicated broadcast scheme and the present study aims to propose potential strategies to overcome the current limitations. The global broadcast channel relies on geostationary satellites for disseminating the precise corrections for all the GNSS satellites at the same time. Two major cases are considered: SBAS and commercial PPP providers. SBAS is planned to achieve worldwide coverage by 2020, but the dissemination of precise corrections to achieve cm level accuracy is today outside the scope of such systems, mainly because providing the integrity for such an accuracy might be not easy to achieve. Nevertheless, a new service providing high accuracy corrections (initially without integrity) could be implemented using a potentially available spare bandwidth in the SBAS. Nowadays, commercial geostationary satellites are the only way to achieve the dissemination of precise corrections, using commercial PPP service providers that currently cover the entire globe. This work will analyze the implications of using such communication channels on the space receiver architecture. The adopted solution will…
Remote Sensing, Aug 14, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Proceedings of the Satellite Division's International Technical Meeting, Oct 13, 2021
We thank A. Possenti for the kind help with Tempo2. We thank also INAF and the Galileo Supervisin... more We thank A. Possenti for the kind help with Tempo2. We thank also INAF and the Galileo Supervising Authority for providing support.
The Italian Space Agency (ASI - Agenzia Spaziale Italiana) founded a pool of Italian Universities... more The Italian Space Agency (ASI - Agenzia Spaziale Italiana) founded a pool of Italian Universities and Research Centers for the implementation of the overall (and state-of-the-art) RO processing chain which is called ROSA ROSSA (ROSA-Research and Operational Satellite and ...
Gps Solutions, Apr 7, 2022
The Galileo High Accuracy Service (HAS), aiming at providing a Precise Point Positioning (PPP) se... more The Galileo High Accuracy Service (HAS), aiming at providing a Precise Point Positioning (PPP) service worldwide, will soon transmit precise orbits, clocks and biases, for both Galileo and GPS, in the signal-in-space and through a ground channel. This will be complemented in the future with precise ionosphere corrections and HAS data authentication. This work provides an overview of Galileo initial HAS, focusing on its overall message structure, architecture, and early performance. The initial HAS is strictly based on the existing Galileo monitoring and uplink capabilities already available for the other Galileo services. This contribution assesses the service coverage, the accuracy of the broadcast corrections, and the user PPP performance of Galileo HAS for the first time. The results show that Galileo HAS can provide broad coverage with few-centimeter broadcast correction accuracy and fulfill the targeted two-decimeter user horizontal accuracy in the evaluated conditions even in its initial phase.
Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), 2019
The paper presents a low-cost Space GNSS receiver for Cubesats promoted by European Space Agency,... more The paper presents a low-cost Space GNSS receiver for Cubesats promoted by European Space Agency, with the aim of providing real-time precise on-board orbit determination (P2OD). The activity is oriented to a Low-Earth Orbit in-orbit demonstration of the concept in 2020-2021. The GNSS Receiver is based on Deimos’ FPGA-based dual frequency GPS / Galileo receiver (L1/E1 and L5/E5a), integrated in a space qualified Software Defined Radio (SDR) hardware platform produced by GomSpace, and a Precise Point Positioning (PPP) software library provided by Fugro. The University of Nottingham will contribute to the validation campaign. The paper describes preliminary performance results obtained during system design and the on-going qualification campaign.
Proceedings of the 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021), 2021
SPIE Proceedings, 2015
Aqueye+ is a new ultrafast optical single photon counter, based on single photon avalanche photod... more Aqueye+ is a new ultrafast optical single photon counter, based on single photon avalanche photodiodes (SPAD) and a 4fold split-pupil concept. It is a completely revisited version of its predecessor, Aqueye, successfully mounted at the 182 cm Copernicus telescope in Asiago. Here we will present the new technological features implemented on Aqueye+, namely a state of the art timing system, a dedicated and optimized optical train, a high sensitivity and high frame rate field camera and remote control, which will give Aqueye plus much superior performances with respect to its predecessor, unparalleled by any other existing fast photometer. The instrument will host also an optical vorticity module to achieve high performance astronomical coronography and a real time acquisition of atmospheric seeing unit. The present paper describes the instrument and its first performances.
Journal of Modern Optics, 2009
... Including selected papers from the 3rd International Workshop, SPW2007, 2428 September 2007,... more ... Including selected papers from the 3rd International Workshop, SPW2007, 2428 September 2007, Edited by Jessica Cheung, Alan Migdall and Maria-Luisa Rastello. ... Bonanno, G, Bruno, P, Calì, A, Cosentino, R, di Benedetto, R, Puleo, M and Scuderi, S. 1996. ...
Proceedings of the Institute of Navigation ... International Technical Meeting, Feb 14, 2022
Journal of Guidance Control and Dynamics, May 21, 2023
Nowadays, deep-space navigation strongly depends on ground segments, e.g., ESA’s European Space T... more Nowadays, deep-space navigation strongly depends on ground segments, e.g., ESA’s European Space Tracking and NASA’s Deep Space Network. However, the positioning accuracy of ground-based navigation systems decreases with the distance from the Earth, significantly increasing the positioning uncertainty for interplanetary missions. Furthermore, ground-based navigation systems require extensive ground operations, and their limited bandwidth could lead to a point of full utilization in the future. The aim of this work is to introduce—for the first time—the concept of space navigation by optical pulsars, a novel technology that aims at overcoming the limits of ground-based navigation systems. This paper presents, first, an introduction to satellite navigation by using pulsars, discussing on the physical and timing properties of optical pulsars. Then, it investigates on the timing techniques allowing to reconstruct, process, and make use of a pulsar signal, leading to a position estimation. Finally, it reports the results of a clock error estimation performed on ground with real pulsar data and a first estimation of the achievable positioning accuracy in a simulated highly elliptical orbit around the Earth.
Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023)
Proceedings of a meeting, Feb 23, 2021
(Presentation slides only) The Galileo system is a constellation of 30 satellites with a global g... more (Presentation slides only) The Galileo system is a constellation of 30 satellites with a global ground infrastructure. Already 26 satellites have been launched with an additional 12 on order. Initial services started on 15 Dec 2016. This presentation will provide an update on the current status of the Galileo System, the achieved performances to date and touch on the new developments which could be of interest for the timing community, such as I/NAV message improvements for faster signal acquisition, Open Service Navigation Message Authentication (OS-NMA) for authenticating the navigation message, Commercial Access Service (CAS) capabilities to encrypt the E6c signal and High Accuracy Service (HAS) to offer 20 cm position accuracy. The presentation will zoom into the achieved UTC and GPS-to-Galileo Time Offset dissemination performance. Additional, the presentation will provide some expected benefits for timing users of the Galileo HAS, such as synchronisation of user equipment. An outlook will be given to some future studied improvements to increase the robustness of the Galileo timekeeping system.
Proceedings of SPIE, May 7, 2009
In the great majority of the cases, present astronomical observations are realized analyzing only... more In the great majority of the cases, present astronomical observations are realized analyzing only first order spatial or temporal coherence properties of the collected photon stream. However, a lot of information is "hidden" in the second and higher order coherence terms, as details about a possible stimulated emission mechanism or about photon scattering along the travel from the emitter to the telescope. The Extremely Large Telescopes of the future could provide the high photon flux needed to extract this information. To this aim we have recently studied a possible focal plane instrument, named QuantEYE, for the 100 m OverWhelmingly Large Telescope of the European Southern Observatory. This instrument is the fastest photon counting photometer ever conceived, with an array of 100 parallel channels operating simultaneously, to push the time tagging capabilities toward the pico-second region. To acquire some experience with this novel type of instrumentation, we are now in the process of realizing a small instrument prototype (AquEYE) for the Asiago 182 cm telescope, for then building a larger instrument for one of the existing 8-10 m class telescopes. We hope that the results we will obtain by these instruments will open a new frontier in the astronomical observations.
Proceedings of SPIE, Apr 23, 2010
ABSTRACT Iqueye is a high speed astronomical photon counting device, tested at the ESO 3.5 m New ... more ABSTRACT Iqueye is a high speed astronomical photon counting device, tested at the ESO 3.5 m New Technology Telescope in La Silla (Chile). The optics splits the telescope pupil into four portions each feeding a Single Photon Avalanche Diode. A time-to-digital converter board time tags the pulses from the 4 channels, and the times sent to a storage device. The instrument is capable of running continuously up to a rate of 8 MHz, with an absolute rms accuracy better that 0.5 ns. The time is obtained by means of a rubidium clock referenced to UTC through the GPS signal. The paper describes the analysis performed on data taken on bright stars in order to perform 'quantum-like' measurements in the photon stream, namely the calculation of the second-order correlation functions g(2)(x,0) and g(2)(0,t). To this end, an ad hoc software correlator has been developed. Taking advantage of the pupil-splitting concept, the calculation of g(2)(x,0) has been made between the sub-apertures of the telescope, as a first step to verify the zero-baseline correlation coefficient in an Hanbury-Brown Twiss intensity interferometer [1]. Our experiment demonstrates the value of an Iqueye-like instrument applied to larger telescopes, like the four 8 m VLTs or the two 10m Keck telescopes, and even more the sub-pupils of the future 42 m E-ELT for a novel exploitation of the photon stream from celestial objects.
Proceedings of the Institute of Navigation ... International Technical Meeting, Feb 14, 2022
Proceedings of the Satellite Division's International Technical Meeting, Nov 3, 2017
Satellite orbit determination is a fundamental information for many space missions, several requi... more Satellite orbit determination is a fundamental information for many space missions, several requiring a high level of orbit accuracy. Nowadays the Precise Orbit Determination (POD) is the technique routinely used on ground for computing the orbit of LEO missions, especially when the position of the satellite center of mass has to be known at cm level (e.g.: GRAS, Sentinels, SWARM, GOCE, etc.). The current POD approach must be performed only on ground in post-processing. The orbit accuracy achieved with the POD is typically between 0.1 mm/s to 1 mm/s for the velocity. Despite being in line with mission needs, the post-processing limitation is preventing its use for more advanced applications that require high accuracy in real-time, such as formation flying, autonomous docking and rendezvous, increased spacecraft autonomy, etc. This contribution investigates how to overcome the real-time limitations and shows that real-time Precise Onboard Orbit Determination (P2OD) could be achieved in the near future, bringing the current ground PPP (Precise Point Positioning) and PPP-RTK (Precise Point Positioning -Real Time Kinematic) concept to space users. The target real-time orbit accuracy to be achieved with this approach is 10 cm RMS 3D (1 mm/s for velocity). Different algorithms have already been developed for onboard orbit determination, ranging from a least square approach to Extended or Unscented Kalman Filtering (EKF, UKF). Usually the initial position is provided through a Single Point Positioning (SPP) technique, using only the pseudorange measurements. The SPP solution can be smoothed by fitting a dynamic model. These onboard algorithms allow to reach an orbital velocity accuracy (3D RMS) at m/s or cm/s level ([23], [24], [25], [26] and [27]). Several studies ([28], [29] and [30]) have also investigated the optimization of the force models acting on the satellites and the related parameters for propagating the orbit with the electronics onboard a LEO satellite. The main limitation for such onboard OD algorithms is the lack of precise ephemeris and clock products for the GNSS satellites in real-time. GNSS receivers in space can use techniques and concepts adoptable by GNSS receiver on ground. There are at least two main concepts for real-time high accuracy positioning computation based on GNSS: RTK and PPP. RTK relies on use of ground stations in the proximity of the user receiver, therefore cannot be considered viable from space users. PPP (and its evolution, the PPP-RTK) is based on the broadcast of precise corrections (mainly precise orbits and clocks, but also a precise ionospheric model and, for PPP-RTK, delta phase correction for performing Integer Ambiguity Resolution on the rover) through different communication channels (e.g., via geostationary satellites, GSM, Internet). This study addresses two main types of communication channels for providing precise orbit and clock corrections of the GNSS satellites: the dedicated broadcast and the global broadcast channels. The dedicated broadcast channel assumes that each GNSS satellite (e.g.: GPS or Galileo) broadcasts its own precise corrections for orbits and clocks. Such a condition could be achieved with an improvement of the current broadcasted ephemerides and clocks (via standard navigation message) or via a dedicated communication channel provided by the GNSS satellites that goes on top of the broadcasted navigation message. In this scenario the available bandwidth is normally limited, so the amount of corrections that can be disseminated is limited (allowing to transmit only the corrections for the satellite itself or a small group of nearby satellites) and there is a need for a constant communication contact from the uplink stations to all or a high number of the GNSS satellites. Modern GNSS systems are very close to provide the infrastructure to enable the dedicated broadcast scheme and the present study aims to propose potential strategies to overcome the current limitations. The global broadcast channel relies on geostationary satellites for disseminating the precise corrections for all the GNSS satellites at the same time. Two major cases are considered: SBAS and commercial PPP providers. SBAS is planned to achieve worldwide coverage by 2020, but the dissemination of precise corrections to achieve cm level accuracy is today outside the scope of such systems, mainly because providing the integrity for such an accuracy might be not easy to achieve. Nevertheless, a new service providing high accuracy corrections (initially without integrity) could be implemented using a potentially available spare bandwidth in the SBAS. Nowadays, commercial geostationary satellites are the only way to achieve the dissemination of precise corrections, using commercial PPP service providers that currently cover the entire globe. This work will analyze the implications of using such communication channels on the space receiver architecture. The adopted solution will…
Remote Sensing, Aug 14, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Proceedings of the Satellite Division's International Technical Meeting, Oct 13, 2021
We thank A. Possenti for the kind help with Tempo2. We thank also INAF and the Galileo Supervisin... more We thank A. Possenti for the kind help with Tempo2. We thank also INAF and the Galileo Supervising Authority for providing support.
The Italian Space Agency (ASI - Agenzia Spaziale Italiana) founded a pool of Italian Universities... more The Italian Space Agency (ASI - Agenzia Spaziale Italiana) founded a pool of Italian Universities and Research Centers for the implementation of the overall (and state-of-the-art) RO processing chain which is called ROSA ROSSA (ROSA-Research and Operational Satellite and ...
Gps Solutions, Apr 7, 2022
The Galileo High Accuracy Service (HAS), aiming at providing a Precise Point Positioning (PPP) se... more The Galileo High Accuracy Service (HAS), aiming at providing a Precise Point Positioning (PPP) service worldwide, will soon transmit precise orbits, clocks and biases, for both Galileo and GPS, in the signal-in-space and through a ground channel. This will be complemented in the future with precise ionosphere corrections and HAS data authentication. This work provides an overview of Galileo initial HAS, focusing on its overall message structure, architecture, and early performance. The initial HAS is strictly based on the existing Galileo monitoring and uplink capabilities already available for the other Galileo services. This contribution assesses the service coverage, the accuracy of the broadcast corrections, and the user PPP performance of Galileo HAS for the first time. The results show that Galileo HAS can provide broad coverage with few-centimeter broadcast correction accuracy and fulfill the targeted two-decimeter user horizontal accuracy in the evaluated conditions even in its initial phase.
Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), 2019
The paper presents a low-cost Space GNSS receiver for Cubesats promoted by European Space Agency,... more The paper presents a low-cost Space GNSS receiver for Cubesats promoted by European Space Agency, with the aim of providing real-time precise on-board orbit determination (P2OD). The activity is oriented to a Low-Earth Orbit in-orbit demonstration of the concept in 2020-2021. The GNSS Receiver is based on Deimos’ FPGA-based dual frequency GPS / Galileo receiver (L1/E1 and L5/E5a), integrated in a space qualified Software Defined Radio (SDR) hardware platform produced by GomSpace, and a Precise Point Positioning (PPP) software library provided by Fugro. The University of Nottingham will contribute to the validation campaign. The paper describes preliminary performance results obtained during system design and the on-going qualification campaign.
Proceedings of the 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021), 2021
SPIE Proceedings, 2015
Aqueye+ is a new ultrafast optical single photon counter, based on single photon avalanche photod... more Aqueye+ is a new ultrafast optical single photon counter, based on single photon avalanche photodiodes (SPAD) and a 4fold split-pupil concept. It is a completely revisited version of its predecessor, Aqueye, successfully mounted at the 182 cm Copernicus telescope in Asiago. Here we will present the new technological features implemented on Aqueye+, namely a state of the art timing system, a dedicated and optimized optical train, a high sensitivity and high frame rate field camera and remote control, which will give Aqueye plus much superior performances with respect to its predecessor, unparalleled by any other existing fast photometer. The instrument will host also an optical vorticity module to achieve high performance astronomical coronography and a real time acquisition of atmospheric seeing unit. The present paper describes the instrument and its first performances.
Journal of Modern Optics, 2009
... Including selected papers from the 3rd International Workshop, SPW2007, 2428 September 2007,... more ... Including selected papers from the 3rd International Workshop, SPW2007, 2428 September 2007, Edited by Jessica Cheung, Alan Migdall and Maria-Luisa Rastello. ... Bonanno, G, Bruno, P, Calì, A, Cosentino, R, di Benedetto, R, Puleo, M and Scuderi, S. 1996. ...