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检索条件"任意字段=Conference on Advanced Telescope and Instrumentation Control Software"

共 1190 条记录，以下是571-580 订阅

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FPGA based control system for space instrumentation

FPGA based control system for space instrumentation

引用

2nd conference on advanced software and control for Astronomy

作者： Di Giorgio, Anna. M. Irelli, Pasquale Cerulli Nuzzolo, Francesco Orfei, Renato Spinoglio, Luigi Liu, Giovanni S. Saraceno, Paolo INAF Ist Fis Spazio Interplanetario Via Fosso Cavaliere 100 I-00143 Rome Italy

ISBN: (纸本)9780819472298

The prototype for a general purpose FPGA based control system for space instrumentation is presented, with particular attention to the instrument control application software. The system HW is based on the LEON3FT processor, which gives the flexibility to configure the chip with only the necessary HW functionalities, from simple logic up to small dedicated processors. The instrument control SW is developed in ANSI C and for time critical (< 10 mu s) commanding sequences implements an internal instructions sequencer, triggered via an interrupt service routine based on a HW high priority interrupt.

关键词： instrument control FPGA Real Time Applications Sequencer

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Automated CO₂ cleaning system for the SALT primary mirror

Automated CO<sub>2</sub> cleaning system for the SALT primar...

引用

International conference on advanced Optical and Mechanical Technologies in telescopes and instrumentation

作者： Kriel, Herman Strydom, Ockert du Plessis, Charl Gajjar, Hitesh So African Large Telescope ZA-6920 Sutherland South Africa

ISBN: (纸本)9780819472281

SALT developed an automated CO2 Mirror Cleaning System (MCS) for its I I meter diameter segmented primary mirror. In this paper we report oil the mechanical design of the system, the safety considerations taken into account given that the mechanism has, to be lowered over the primary mirror for every cleaning cycle, the Computerized control system and the CO2 installation,which feeds the cleaning wand with liquid CO2. The paper also addresses the complexities experienced in providing high Pressure liquid CO2 for the effective operation of the cleaning wand as well as the safety precautions implemented to ensure the safety of staff members at all times. The performance results are also presented although the system is still being optimised in a trade off between cleaning efficiency, CO2 consumption, the duration of a cleaning cycle and the cleaning frequency.

关键词： SALT CO2 cleaning

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The LINC-NIRVANA Fringe and Flexure Tracker: Testing Piston control Performance

The LINC-NIRVANA Fringe and Flexure Tracker: Testing Piston ...

引用

conference on Optical and Infrared Interferometry

作者： Rost, Steffen Bertram, Thomas Lindhorst, Bettina Straubmeier, Christian Tremou, Evangelia Wang, Yeping Witzel, Gunther Eckart, Andreas Univ Cologne Inst Phys 1 D-50937 Cologne Germany

ISBN: (纸本)9780819472236

LINC-NIRVANA is the NIR homothetic imaging camera for the Large Binocular telescope (LBT). Its Fringe and Flexusre Tracking System (FFTS) is mandatory for an efficient interferometric operation of LINC-NIRVANA: the task of this cophasing system is to assure a time-stable interference pattern in the focal plane of the camera. Differential piston effects will be detected and corrected in a real-time closed loop by analyzing the PSF of a guide star at a frequency of 100Hz-200Hz. A dedicated piston mirror will then be moved in a corresponding manner by a piezo actuator. The long-term flexure tip/tilt variations will be compensated by the AO deformable mirrors. A testbed interferometer has been designed to simulate the control process of the movement of a scaled piston mirror under disturbances. telescope vibration and atmospheric variations with arbitrary power spectra are induced into the optical path by a dedicated piezo actuator. Limiting factors of the control bandwith are the sampling frequency and delay of the detector and the resonance frequency of the piston mirror. In our setup we can test the control performance under realistic conditions by considering the real piston mirrors dynamics with an appropriate software filter and inducing a artificial delay of the PSF detector signal. Together with the expected atmospheric OPD variations and a realistic vibration spectrum we are able to quantify the piston control performance for typical observation conditions. A robust control approach is presented as result from in-system control design as provided by the testbed interferometer with simulated dynamics.

关键词： LBT LINC-NIRVANA fringe tracking piston control

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CADOR and TAROT: A Virtual Observatory

CADOR and TAROT: A Virtual Observatory

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2nd conference on advanced software and control for Astronomy

作者： Bourez-Laas, Myrtille Vachier, Frederic Klotz, Alain Damerdji, Yassine Boer, Michel CNRS Observ Haute Provence F-04870 St Michel France CNRS OPM Inst Mecanique Celeste & calcul Ephemerides F-75014 Paris France CNRS UPS Ctr Etude Spatiale Rayonnements F-31028 Toulouse France Univ Liege Lab Astrophys & Geophys B-4000 Liege Belgium

ISBN: (纸本)9780819472298

TAROT (telescope Action Rapide pour les Objets Transitoires - Rapid Action telescope for Transient Objects) is a network of two robotic ground based telescopes. The telescopes are fully automated, from the scheduling of the observation requests to the processing of the data. All the applications use a specific automated processing pipeline which has been continuously improved. CADOR, (Coordination et Analyse des Donnees d'Observatoires Robotises - Coordination and Data Analysis of Robotic Observatories) is a set of data base servers which manage TAROT telescopes. CADOR is the prime interface to request new observations from TAROT and to access all images saved with the possibility to make additional processing and analysis. Tarot and Cador are compliant with Virtual Observatory standard and protocols.

关键词： automated telescope data base virtual observatory

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A component based astronomical visualization tool for instrument control

A component based astronomical visualization tool for instru...

引用

2nd conference on advanced software and control for Astronomy

作者： Briegel, Florian Berwein, Jurgen Kittmann, Frank Pavlo, Alex(ey) Max Planck Inst Astron D-69117 Heidelberg Germany

ISBN: (纸本)9780819472298

For various astronomical instruments developed at the Max-Planck-Institute-Heidelberg there was a need for a highly flexible display and control tool. Many display tools (ximtool, DS9, skycat,..) are available for astronomy, but. all this applications are monolitic and can't be easily enriched by plugins for interaction with the graphical display, and other functionalities for remote access and control of the instrument and data pipepline. It was developed on top of Trolltechs Cross-Platform Rich Client Development Framework Qt,(1) the modern middleware Internet Communications Engine(2) from ZeroC and the template based SOA developer framework for astronomical instrumentation NICE.(3) The display tool is used on the Calar Alto Observatory (Spain) as a guider for wide field imager and guider at the Wise Observatory (Israel) and for the LBT interferometer Linc-Nirvana, (USA).

关键词： Cameras Astronomy Human-machine interfaces Observatories CCD cameras Visualization control systems Astronomical instrumentation Imaging systems Internet

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The STELLA robotic observatory: first two years of high-resolution spectroscopy

The STELLA robotic observatory: first two years of high-reso...

引用

2nd conference on advanced software and control for Astronomy

作者： Weber, Michael Granzer, Thomas Strassmeier, Klaus G. Woche, Manfred Astrophys Inst Potsdam An Der Sternwarte 16 D-14482 Potsdam Germany

ISBN: (纸本)9780819472298

The STELLA project consists of two robotic 1.2m telescopes to simultaneously monitor stellar activity with a high resolution echelle spectrograph on one telescope, and a photometric imaging instrument on the other telescope. The STELLA observatory is located at the Observatorio del Teide on the Canary island of Tenerife. The STELLA Echelle spectrograph (SES) has been operated in robotic mode for two years now, and produced approximately 10,000 spectra of the entire optical range between 390 and 900nm at a spectral resolution of 55,000 with a peak shutter-open time of 93%. Although we do not use an iodine cell nor an actively stabilized chamber, its average radial velocity precision over the past two years was 60 to 150 m/s rms, depending on target. The Wide-Field STELLA Imaging Photometer (WIFSIP) is currently being tested and will enter operation early 2009. In this paper, we present an update report on the first two years of operation.

关键词： Spectrographs Robotic telescope

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The GIANO control software system

The GIANO control software system

引用

2nd conference on advanced software and control for Astronomy

作者： Rossetti, Emanuel Oliva, Ernesto Origlia, Livia Osservatorio Astron Bologna INAF Via Ranzani 1 I-40127 Bologna Italy INAF Osserv Astrofisico Arcetri I-50125 Florence Italy INAF Telescopio Nazl Galileo Santa Cruz De La Palma TF Spain

ISBN: (纸本)9780819472298

GIANO is an ultra-stable IR echelle spectrometer, optimized for both low (R similar or equal to 400) and high (R similar or equal to 50, 000) resolution, that will be installed at the Nasmyth-B focus of the Italian national telescope (TNG). At the beginning of this year the assembling phase of GIANO has started, at the Infrared Laboratory of INAF-Arcetri, and is currently in progress. We describe, here, the general control software structure of the instrument concerning both the user interface and the controls of all subsystems. We present also the software interface which provides the communication with the cryogenic system of the instrument and is handled by means of a Programmable Logic controller.

关键词： control software PLC infrared spectrometer

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STARS 2.0 2^nd generation open source archiving and query software

STARS 2.0 2<SUP>nd</SUP> generation open source archiving an...

引用

conference on Observatory Operations - Strategies, Processes, and Systems II

作者： Winegar, Tom Subaru Telescope Mauna Kea HI USA

ISBN: (纸本)9780819472267

The Subaru telescope is in process of developing an open-source alternative to the 1st-generation software and databases (STARS 1) used for archiving and query. For STARS 2, we have chosen PHP and Python for scripting and MySQL as the database software. We have collected feedback from staff and observers, and used this feedback to significantly improve the design and functionality of our future archiving and query software. Archiving - We identified two weaknesses in 1st-generation STARS archiving software: a complex and inflexible table structure and uncoordinated system administration for our business model: taking pictures from the summit and archiving them in both Hawaii and Japan. We adopted a simplified and normalized table structure with passive keyword collection, and we are designing an archive-to-archive file transfer system that automatically reports real-time status and error conditions and permits error recovery. Query - We identified several weaknesses in 1st-generation STARS query software: inflexible query tools, poor sharing of calibration data, and no automatic file transfer mechanisms to observers. We are developing improved query tools and sharing of calibration data, and multi-protocol unassisted file transfer mechanisms for observers. In the process, we have redefined a 'query': from an invisible search result that can only transfer once in-house right now, with little status and error reporting and no error recovery - to a stored search result that can be monitored, transferred to different locations with multiple protocols, reporting status and error conditions and permitting recovery from errors.

关键词： Stars Calibration Databases telescopes Data archive systems Observatories Astronomy Data centers Prototyping control systems

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software in the CARMA Heterogeneous Millimeter-wave Array

Software in the CARMA Heterogeneous Millimeter-wave Array

引用

2nd conference on advanced software and control for Astronomy

作者： Scott, Stephen L. CALTECH Owens Valley Radio Observ Big Pine CA 93513 USA

ISBN: (纸本)9780819472298

The Combined Array for Research in Millimeter-wave Astronomy (CARMA) is a 15 element heterogeneous millimeter-wave array developed and operated by a university consortium that will be expanded to 23 elements in 2008. Commissioning began in August 2005 after completion of the relocation of antennas from the Owens Valley Radio Observatory (OVRO) and the Berkeley-Illinois-Maryland Association (BIMA) arrays to a new high site and initial scientific operations began in April 2006. The array operates in the 3-mm and 1-mm bands and has a maximum resolution of 0.15 arc seconds. Most of the software and computing infrastructure for the array is new, allowing modem technology to be introduced and to provide a common interface for the disparate antenna types. The new system is proving to be both easy to use for routine observations and yet capable enough for the development of new observing techniques by the experienced astronomer. Some of the details of the computing and software are described here, with emphasis on the control system.

关键词： CARMA millimeter-wave interferometry radio astronomy control systems software

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The RTS2 protocol

The RTS2 protocol

引用

2nd conference on advanced software and control for Astronomy

作者： Kubanek, Petr Jelinek, Martin French, John Prouza, Michal Vitek, Stanislav Castro-Tirado, Alberto J. Reglero, Victor GACE Valencia Valencia Spain Inst Astrofis Andalucia IAA CSIC Granada Spain Univ Coll Dublin Dublin Ireland Fyzikalni Ustav Akad Ved Prague Czech Republic

ISBN: (纸本)9780819472298

Remote telescope System 2nd version (RTS2) is an open source project aimed at developing a software environment to control a fully robotic observatory. RTS2 consists of various components, which communicate via an ASCII based protocol. As the protocol was from the beginning designed is an observatory control system, it provides some unique features, which are hard to find in the other communication systems. These features include advanced synchronisation mechanisms and strategies for setting variables. This presentation describes the protocol and its unique features. It also assesses protocol performance, and provides examples how the RTS2 library can be used to quickly build an observatory control system.

关键词： telescopes Binary data Observatories Cameras Image processing Telecommunications control systems Optical filters Robotics software development

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