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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411-420 订阅

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Image Acquisition System with Three CCD Cameras

Image Acquisition System with Three CCD Cameras

引用

conference On software and Cyberinfrastructure for Astronomy II

作者： Li, Binhua Zhang, Yigong Yang, Lei Mao, Wei Wang, Jiancheng Kunming Univ Sci & Technol Fac Imformat Engn & Automat Kunming 650051 Peoples R China Chinese Acad Sci Yunnan Astron Observ Kunming 650011 Peoples R China

ISBN: (纸本)9780819491527

A new astrometric telescope, Multi-Function Astronomical Transit, has been built in Yunnan Astronomical Observatory. Its main imaging device is a digital CCD camera without refrigeration because the telescope is only used to observe stars brighter than 7.5mag. As an astrometric telescope like the Lower Latitude Meridian Circle, some special errors from the horizon and the altitude axis of the telescope must be measured. Thus two analog CCD cameras are used. The digital camera is connected to a digital frame grabber via a Camera Link cable and a custom-made cable, while the two analog cameras are connected to an analog frame grabber by two custom-made cables. The two frame grabbers are separately mounted in two image workstations and operate in external trigger mode. Two trigger signals are generated by the telescope control system, one for the digital camera, another for the two analog cameras. The software of image acquisition is programmed using VC++ and Sapera LT. This paper presents an imaging system solution for the new transit, programming methods and the test observation results.

关键词： Astrometry instrumentation CCD camera image acquisition C plus plus programming

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Instrument control software Development Process for the Multi-Star AO System ARGOS

Instrument Control Software Development Process for the Mult...

引用

conference On software and Cyberinfrastructure for Astronomy II

作者： Kulas, M. Barl, L. Borelli, J. L. Gaessler, W. Rabien, S. Max Planck Inst Astron Konigstuhl 17 D-6900 Heidelberg Germany Max Planck Inst Extraterrestrial Phys Garching Germany

ISBN: (纸本)9780819491527

The ARGOS project (advanced Rayleigh guided Ground layer adaptive Optics System) will upgrade the Large Binocular telescope (LBT) with an AO System consisting of six Rayleigh laser guide stars. This adaptive optics system integrates several control loops and many different components like lasers, calibration swing arms and slope computers that are dispersed throughout the telescope. The purpose of the instrument control software (ICS) is running this AO system and providing convenient client interfaces to the instruments and the control loops. The challenges for the ARGOS ICS are the development of a distributed and safety-critical software system with no defects in a short time, the creation of huge and complex software programs with a maintainable code base, the delivery of software components with the desired functionality and the support of geographically distributed project partners. To tackle these difficult tasks, the ARGOS software engineers reuse existing software like the novel middleware from LINC-NIRVANA, an instrument for the LBT, provide many tests at different functional levels like unit tests and regression tests, agree about code and architecture style and deliver software incrementally while closely collaborating with the project partners. Many ARGOS ICS components are already successfully in use in the laboratories for testing ARGOS control loops.

关键词： LBT adaptive optics software development process continuous delivery distributed system instrument control software rapid prototyping pair programming test-driven development (TDD)

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Simulating point spread functions for the James Webb Space telescope with WebbPSF

Simulating point spread functions for the James Webb Space T...

引用

conference on Space telescopes and instrumentation - Optical, Infrared, and Millimeter Wave

作者： Perrin, Marshall D. Soummer, Remi Elliott, Erin M. Lallo, Matthew D. Sivaramakrishnan, Anand Space Telescope Sci Inst Baltimore MD 21218 USA

ISBN: (纸本)9780819491435

Experience with the Hubble Space telescope has shown that accurate models of optical performance are extremely desirable to astronomers, both for assessing feasibility and planning scientific observations, and for data analyses such as point-spread-function (PSF)-fitting photometry and astrometry, deconvolution, and PSF subtraction. Compared to previous space observatories, the temporal variability and active control of the James Webb Space telescope (JWST) pose a significantly greater challenge for accurate modeling. We describe here some initial steps toward meeting the community's need for such PSF simulations. A software package called WebbPSF now provides the capability for simulating PSFs for JWST's instruments in all imaging modes, including direct imaging, coronagraphy, and non-redundant aperture masking. WebbPSF is intended to provide model PSFs suitable for planning observations and creating mock science data, via a straightforward interface accessible to any astronomer;as such it is complementary to the sophisticated but complex-to-use modeling tools used primarily by optical designers. WebbPSF is implemented using a new exible and extensible optical propagation library in the Python programming language. While the initial version uses static precomputed wavefront simulations, over time this system is evolving to include both spatial and temporal variation in PSFs, building on existing modeling efforts within the JWST program. Our long-term goal is to provide a general-purpose PSF modeling capability akin to Hubble's Tiny Tim software, and of sufficient accuracy to be useful to the community.

关键词： Point spread function simulations coronagraphy James Webb Space telescope

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Design and First Commissioning Results of PLC-based control Systems at the Mercator telescope

Design and First Commissioning Results of PLC-based Control ...

引用

conference On software and Cyberinfrastructure for Astronomy II

作者： Pessemier, Wim Deconinck, Geert Raskin, Gert Saey, Philippe Van Winckel, Hans KULeuven Inst Astron Leuven Belgium KULeuven ESAT Dept Elect Engn Leuven Belgium E & A Energy & Automat Ghent Belgium

ISBN: (纸本)9780819491527

The 1.2m optical Mercator telescope (based at the Roque de Los Muchachos Observatory at La Palma) is currently in the commissioning phase of a third permanently installed instrument called MAIA (Mercator advanced Imager for Asteroseismology), a three-channel frame-transfer imager optimized for rapid photometry. Despite having three cryostats, MAIA is designed as a highly compact and portable instrument by using small Stirling-type cryocoolers, and a single PLC in charge of all temperature control loops, cryocooler interaction, telemetry acquisition and other instrument control related tasks. To accommodate MAIA at the Nasmyth B focal station of the telescope, a new mechanism for the tertiary mirror had to be built since the former mechanism only allowed motor controlled access to the Cassegrain and Nasmyth A focal stations. A second PLC has been installed in order to control the two degrees of freedom of this mirror mechanism by interfacing with its motor controllers, high-precision optical encoders, and limit switches. This PLC is not dedicated to the tertiary mirror control but will serve as a general purpose controller for various tasks related to the telescope and the observatory, as part of a new telescope control System primarily based on PLCs and OPC UA communication technology. Due to the central location of the PLC inside the observatory, the position control loops of the mirror mechanism are distributed using EtherCAT as the communication fieldbus. In this paper we present the design and the first commissioning results of both the MAIA instrument control and the tertiary mirror control.

关键词： PLC Instrument control OPC UA UAF Model Driven Development

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A simple controller for bidimensional image detectors

A simple controller for bidimensional image detectors

引用

conference on High Energy, Optical, and Infrared Detectors for Astronomy V

作者： Angeles, F. Martinez, L. A. Univ Nacl Autonoma Mexico Inst Astron Mexico City 04510 DF Mexico

ISBN: (纸本)9780819491541

The increasing use of many and different kind of light detectors to acquire, monitor and control various aspects of the observation imposes the need to standardize the acquisition and processing of images and data. While scientific image acquisition systems usually include a complex controller, some less demanding subsystems require the development of electronics and software to read the image. Most of the times these image detectors are rather small and high speed is of no concern, so controllers need not to be fast;take for instance a telescope guider. With these directives in mind, in this work we present a very simple image acquisition system based on a Texas Instruments microcontroller of the family MSP430 and a serial static memory as a standard instrumentation starting for small image acquisition controllers.

关键词： microcontroller robotic memory image detector telescope acquisition

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Optical telescope BIRT in ORIGIN for Gamma Ray Burst Observing

Optical Telescope BIRT in ORIGIN for Gamma Ray Burst Observi...

引用

conference on Space telescopes and instrumentation - Optical, Infrared, and Millimeter Wave

作者： Content, Robert Sharples, Ray Page, Mathew J. Cole, Richard Walton, David M. Winter, Berend Pedersen, Kristian Hjorth, Jens Andersen, Michael Hornstrup, Allan Den Herder, Jan-Willem A. Piro, Luigi Australian Astron Observ 167 Vimiera Rd Marsfield NSW 2122 Australia

ISBN: (纸本)9780819491435

The ORIGIN concept is a space mission with a gamma ray, an X-ray and an optical telescope to observe the gamma ray bursts at large Z to determine the composition and density of the intergalactic matter in the line of sight. It was an answer to the ESA M3 call for proposal. The optical telescope is a 0.7-m F/1 with a very small instrument box containing 3 instruments: a slitless spectrograph with a resolution of 20, a multi-imager giving images of a field in 4 bands simultaneously, and a cross-dispersed Echelle spectrograph giving a resolution of 1000. The wavelength range is 0.5 mu m to 1.7 mu m. All instruments fit together in a box of 80 mm x 80 mm x 200 mm. The low resolution spectrograph uses a very compact design including a special triplet. It contains only spherical surfaces except for one tilted cylindrical surface to disperse the light. To reduce the need for a high precision pointing, an advanced Image Slicer was added in front of the high resolution spectrograph. This spectrograph uses a simple design with only one mirror for the collimator and another for the camera. The Imager contains dichroics to separate the bandwidths and glass thicknesses to compensate the differences in path length. All 3 instruments use the same 2k x 2k detector simultaneously so that telescope pointing and tip-tilt control of a fold mirror permit to place the gamma ray burst on the desired instrument without any other mechanism.

关键词： space telescope spectrographs gamma ray bursts

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Hyper Suprime-Cam: the control System

Hyper Suprime-Cam: the Control System

引用

conference on Ground-Based and Airborne telescopes IV

作者： Utsumi, Yousuke Kawanomoto, Satoshi Tait, Philip Jeschke, Eric Furusawa, Hisanori Kamata, Yukiko Koike, Michitaro Komiyama, Yutaka Miyazaki, Satoshi Morokuma, Tomoki Nakata, Fumiaki Nakaya, Hidehiko Uraguchi, Fumihiro Natl Inst Nat Sci Natl Astron Observ Japan Osawa 2-21-1 Mitaka Tokyo Japan Japan Soc Promot Sci Chiyoda Ku 1-8 Tokyo Japan Subaru Telescope 650 North Aohoku Pl Hilo HI USA Univ Tokyo Inst Astron Osawa 2-21-1 Tokyo Japan

ISBN: (纸本)9780819491473

We introduce the detail of the control system of Hyper Suprime-Cam (HSC) and its performance. Although it has almost 10 times as many CCDs (104) as existing camera (Suprime-Cam), it is controlled by the common user interface, the Subaru Observation software System (SOSS) with the Gen2 implementation through the HSC local controller (OBCP). If we adopt parallel programming, the read-out time should be within 25 seconds including 18.6 seconds of readout time which is comparable to the current Suprime-Cam.

关键词： CCD mosaic camera camera control

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SPHERE instrumentation software: a progress report

SPHERE Instrumentation Software: a progress report

引用

conference On software and Cyberinfrastructure for Astronomy II

作者： Baruffolo, A. Fantinel, D. Gluck, L. Salasnich, B. Zins, G. Steiner, P. Micallef, M. Bruno, P. Popovic, D. Donaldson, R. H. Fedrigo, E. Kiekebusch, M. Soenke, C. Valles, M. Suarez INAF Osservatorio Astron Padova Vicolo Osservatorio 5 I-35122 Padua Italy INAF Osservatorio Astron Catania I-95123 Catania Italy European So Observ F-38041 Grenoble France Inst Planetol & Astrophys Grenoble F-38041 Grenoble 9 France ETH Inst Astron CH-8092 Zurich Switzerland

ISBN: (纸本)9780819491527

SPHERE INS is the software devoted to the control of the SPHERE "Planet Finder Instrument". SPHERE is a second generation instrument for the VLT whose prime objective is the discovery and study of new extra-solar giant planets orbiting nearby stars. The instrument is currently assembled and being tested. It is expected to undergo Preliminary Acceptance in Europe before the end of 2012. SPHERE INS, besides controlling the instrument functions, implements all observation, calibration and maintenance procedures. It includes on-line data reduction procedures, necessary during observations and calibrations, as well as quick-look procedures that allow monitoring the status of ongoing observations. SPHERE INS also manages the external interfaces with the VLT telescope control software, the High-level Observing software and the Data Handling System. It provides both observing and engineering graphical user interfaces. In this paper we give a brief review of the SPHERE INS design. We then report about the current status of the software, the activities concerning its integration with the Instrument and the testing and validation procedures.

关键词： Instrument control software software Integration software Testing software Engineering

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HETDEX Tracker control System Design and Implementation

HETDEX Tracker Control System Design and Implementation

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conference on Ground-Based and Airborne telescopes IV

作者： Beno, Joseph Hayes, Richard Leck, Ron Penney, Charles Soukup, Ian Univ Texas Austin Ctr Electromech 1 Univ Stn R7000 Austin TX 78712 USA Univ Texas Austin McDonald Observ Austin TX 78712 USA

ISBN: (纸本)9780819491459

To enable the Hobby-Eberly telescope Dark Energy Experiment, The University of Texas at Austin Center for Electromechanics and McDonald Observatory developed a precision tracker and control system - an 18,000 kg robot to position a 3,100 kg payload within 10 microns of a desired dynamic track. Performance requirements to meet science needs and safety requirements that emerged from detailed Failure Modes and Effects Analysis resulted in a system of 13 precision controlled actuators and 100 additional analog and digital devices (primarily sensors and safety limit switches). Due to this complexity, demanding accuracy requirements, and stringent safety requirements, two independent control systems were developed. First, a versatile and easily configurable centralized control system that links with modeling and simulation tools during the hardware and software design process was deemed essential for normal operation including motion control. A second, parallel, control system, the Hardware Fault controller (HFC) provides independent monitoring and fault control through a dedicated microcontroller to force a safe, controlled shutdown of the entire system in the event a fault is detected. Motion controls were developed in a Matlab-Simulink simulation environment, and coupled with dSPACE controller hardware. The dSPACE real-time operating system collects sensor information;motor commands are transmitted over a PROFIBUS network to servo amplifiers and drive motor status is received over the same network. To interface the dSPACE controller directly to absolute Heidenhain sensors with EnDat 2.2 protocol, a custom communication board was developed. This paper covers details of operational control software, the HFC, algorithms, tuning, debugging, testing, and lessons learned.

关键词： Hobby-Eberly telescope HET HETDEX wide field corrector tracker constant force drive hardware fault controller control system Center for Electromechanics McDonald Observatory CEM

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Deployment Status of the Las Cumbres Observatory Global telescope

Deployment Status of the Las Cumbres Observatory Global Tele...

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conference on Ground-Based and Airborne telescopes IV

作者： Pickles, A. J. Rosing, W. Martinez, J. Fulton, B. J. Sand, D. Las Cumbres Observatory Global Telescope Network (United States)

ISBN: (纸本)9780819491459

Our global network of telescopes is designed to provide maximally available optical monitoring of time variable sources, from solar system to extra-galactic objects, and ranging in brightness from about 7-20m. We are providing a distributed network with varied apertures but homogeneous instrumentation: optical imaging, with spectroscopic capabilities. A key component is a single centralized process that accepts (in real time) and schedules TAC approved observing requests across the network;then continuously updates schedules based on status, weather and other availability criteria. Requests range from occasional to continuous monitoring, at slow to high-speed cadences (imaging and fast photometry), and includes rapid response to targets of opportunity. Each node of the network must be fully autonomous, with software agents to control and monitor all functions, to provide auto-recovery as necessary, and to announce their status and capabilities up the control structure. Real-time monitoring or interaction by humans should be infrequent. Equipment is designed to be reliable over long periods to minimize hands-on maintenance, by local or LCOGT staff. Our first 1m deployment was to McDonald Obs. in April 2012. Eight more 1m telescopes are close to deployment to complete the Southern ring, scheduled by end-2012.

关键词： telescopes Observatories Charge-coupled devices Fourier transforms Imaging systems Lanthanum Optical instrument design Single sideband modulation Imaging spectroscopy Spectroscopes

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