Abstract
Astrophysical observatories (AOs) are used to acquire high-quality images from the sky. However, AOs are amenable to distortion phenomena such as seeing. In this paper, we consider specifically the local seeing produced from indoor and outdoor temperature variations. Local seeing contributes to the captured image quality, therefore it must be measured. Local seeing has been considered, to the best of our knowledge, in observatories using ad hoc solutions, typically with high cost and complexity. This paper presents the complete development of an autonomous wireless sensor network (WSN) composed of temperature-measuring for real-time local seeing measurement. Therefore, a WSN is deployed using Zigbee as a data communication exchange. As a result, a long continuous-operating system is constructed and tested in a real AO infrastructure. Finally, we calculate a preliminary dome local seeing, from the acquired temperature data, achieving reasonable results.
Highlights
Astrophysical observatories (AOs) are scientific infrastructures to observe and acquire high-quality images from the sky to compose a complete celestial map, study given phenomenon, and other tasks.Ground-based AOs are placed in high-altitude remote locations to reduce environmental, light, and radio-frequency interference effects
We present the seeing importance in astrophysical observatories to build the most complete sky map for further object discoveries
We emphasis how the local seeing provoked from the dome itself may influence the image quality
Summary
Astrophysical observatories (AOs) are scientific infrastructures to observe and acquire high-quality images from the sky to compose a complete celestial map, study given phenomenon, and other tasks.Ground-based AOs are placed in high-altitude remote locations to reduce environmental, light, and radio-frequency interference effects. Astrophysical observatories (AOs) are scientific infrastructures to observe and acquire high-quality images from the sky to compose a complete celestial map, study given phenomenon, and other tasks. AOs are sensitive to distortion phenomena reducing the image quality. Atmospheric seeing depends on atmosphere changes and local seeing it is produced from indoor and outdoor observatory temperature variations, being a more controllable issue to take into account. The variations in temperature create turbulence on the dome, which causes astronomical objects to flash and forms blurry images, putting a limit on the capacity of telescopes and instruments to solve astronomical objects. The intuition behind local seeing is that an immobile and optically perfect image indicates an excellent seeing. A rapidly changing image generates a distortion and indicates poor seeing. To get an idea of the seeing’s phenomenon importance, NASA invested 2800 million US dollars in the Hubble
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