High-Speed Hα Camera and the Real-Time Image Processing System for Solar Observations
High-Speed Hα Camera and the Real-Time Image Processing System for Solar Observations
复制标题
高速Hα相机及太阳观测实时图像处理系统
DOI：
10.1117/12.460279
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Ichimoto
中科院分区：
文献类型：
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作者：
Y. Hanaoka;M. Noguchi;T. Sakurai;K. Ichimoto
我们已经为位于日本NAOJ的Mitaka太阳耀斑望远镜的Hα成像仪开发了一个新的数字成像系统，用于太阳耀斑的高节奏观测。为了分辨脉冲型太阳耀斑的单个尖峰（基本爆发），要求时间分辨率在1 s以内，空间分辨率在1”左右，高速Hα相机实现了这一要求。这种高分辨率的观测产生了巨大的数据量，建立一个高节奏的系统一直是主要的困难。由于太阳光学观测数据具有多维性（空间/时间/波长/偏振态），因此其数据量通常是巨大的。对观测数据进行有效的实时处理对于从原始数据中提取有意义的信息至关重要。计算机技术的最新发展使用一台小型计算机处理大量数据成为可能。为此，我们首先研制了一套基于PC机的灵活的实时图像处理系统，适用于太阳光学观测所需的各种实时数据处理。基于该系统研制了高速Hα相机。本文介绍了实时图像处理系统和高速Hα相机系统，以及Hα相机的实际运行情况。
We have developed a new digital imaging system for the Hα imager of the Solar Flare Telescope at Mitaka, NAOJ, for high-cadence observations of solar flares. To resolve individual spikes elementary bursts) of impulsive solar flares requires a time resolution within 1 s and a spatial resolution of about 1", and the high-speed Hα camera realized them. Such high-resolution observations produce huge amount of data, and it has been the major difficulty to construct a high-cadence system. Generally the amount of data from solar optical observations is huge, because they are multi-dimensional (in space/time/wavelength/polarization status). Efficient real-time processing of observational data is essentially important to extract meaningful information from the raw data. Recent advances in computer technology have made possible to handle vast data with a small computer. Therefore, firstly we have developed a PC-based flexible real-time image processing system, which is applicable to various real-time data processings required for solar optical observations. The high-speed Hα camera is developed based on this system. In this paper, the real-time image processing system and the high-speed Hα camera system are described as well as the actual operation of the Hα camera.