The near-infrared spectrum encompasses three primary atmospheric transmission windows corresponding to the wavelengths J, H, and Ks. This paper introduces a practical automated remote-control system based on Web technology, which utilizes NIR sky brightness measurements for calibrating astronomical observational data. The system enables remote control, automated observation and data visualization. EPICS serves as the connection layer between the microcontroller and the server, implementing the underlying event loop. The web server leverages the Tornado framework to efficiently manage automated observational tasks and performs a real-time correction of the Ks device's detector response using a blackbody radiative source. The system provides a client interface constructed with the Vue framework and utilizing the Element UI component library, allowing users to remotely control instruments, monitor and configure observation tasks, as well as visualize data using the Plotly charting tool via a web browser.
The performance of the camera is a decisive factor in astronomical observations. The scientific CCD fits this need. In order to realize remote control of CCD camera and obtain its performance parameters, a test platform of a scientific CCD camera is built. The test parameters include gain, noise, linearity, full well capacity test, crosstalk test, dark current test. At present, our test platform has carried out multi-group tests of gain, noise, full well and linearity by connecting with a CCD scientific camera. In this paper, a remote control system of the test platform is designed using WEB technology and EPICS, which is convenient for test operators.
KEYWORDS: Cameras, Control systems, Imaging systems, Control systems design, Databases, Web services, Local area networks, Data storage, CCD image sensors
In order to meet the requirement of scientific camera system with remote control, a set of distributed remote control system is built based on EPICS framework and Web service for a camera system. EPICS provides an implementation framework of distributed soft real-time control system based on Channel Access protocol. A single device control program is named IOC. It's convenient to monitor and maintain the status of devices by operating the interfaces of IOC program, namely Process Variable (PV). This paper mainly discusses the IOC implementation of CCD controller, ion pump controller, vacuum pressure sensor and temperature controller, as well as the construction of Web monitoring platform based on Quasar and Flask framework. At present, the remote control system has been put into CCD290-99 camera named PXE290.
A telescope has been an important way to observe the stars since it was invented. With the development of the times, people have higher and higher requirements for telescopes. In order to further improve the imaging quality and observation accuracy, the aperture of the telescope is becoming larger and larger, the associated devices are becoming more and more complex, and the working environment is becoming more and more diverse. A good telescope control system can effectively reduce labor costs and improve the utilization efficiency of observation time, so people put forward higher requirements for telescope control system. The emergence of computers has promoted the rapid development of a control system for a telescope system. Faced with the development trend of large-scale, networked and diversified observation requirements of telescopes, the control system realizes robustness and scalability on the basis of automatic observation. In this paper a control system for a telescope system based on RACS2 framework is introduced. This control system includes front-end services, back-end services, observation control components and device components. The device components are designed, which is responsible for interacting with the devices such as a telescope mount, a camera and a weather station. The remote control is realized based on Web service. The observational operation of the telescope system is tested with good results.
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