SDO/AIA 131 Angstrom FITS Data

The SDO/AIA 131 Å Level 1 FITS Data. The 131 Å channel observes the Fe xx and Fe xxiii lines from 10 MK and 16 MK flaring plasma, respectively.

The Atmospheric Imaging Assembly (AIA) onboard Solar Dynamics Observatory (SDO) focuses on the evolution of the magnetic environment in the Sun’s atmosphere, and its interaction with embedded and surrounding plasma. The AIA investigation covers a broad range of science objectives that focus on five core research themes that both advance solar and heliospheric physics in general and provide advanced warning of coronal and inner-heliospheric disturbances of interest to the Living With a Star (LWS) program, i.e., global change, space weather, human exploration of space, and technological infrastructure in space and on Earth.

AIA provides the following essential capabilities: i) A view of the entire Sun in 4k x 4k resolution (pixel size of 0.6 arcseconds), with full thermal coverage of the corona; ii) A high signal-to-noise ratio for two- to three-second exposures that reaches 100 in quiescent conditions for the low-temperature coronal-imaging channels and during flaring in the higher-temperature channels, with a dynamic range of up to 10,000; iii) Essentially uninterrupted viewing for months at a temporal cadence of 12 seconds in seven extreme UV (EUV) band passes (94, 131, 171, 193, 211, 304 and 335 Å), and 24 seconds for two UV channels (1600 and 1700 Å) band passes; iv) In special observing modes, AIA can capture images of the Sun at higher cadence while keeping within the instrument allocated telemetry by using a subset of bandpass channels, and/or using a crop table.

SDO/AIA 131埃（Å）一级FITS数据。该131埃波段通道分别观测源自10兆开尔文（MK）和16兆开尔文耀斑等离子体的铁XX（Fe xx）与铁XXIII（Fe xxiii）谱线。

搭载于太阳动力学天文台（Solar Dynamics Observatory, SDO）的大气成像组件（Atmospheric Imaging Assembly, AIA），致力于研究太阳大气中磁环境的演化过程，及其与内嵌及周边等离子体的相互作用。AIA的科学研究涵盖广泛的科学目标，聚焦五大核心研究主题：这些主题既推动太阳与日球层物理学的整体发展，也可为“与星共处”（Living With a Star, LWS）计划所关注的日冕及内层日球层扰动提供预警，具体包括全球变化、空间天气、载人太空探索，以及太空与地面技术基础设施。

AIA具备以下核心性能：
1. 以4096×4096分辨率（像素尺寸0.6角秒）实现全日面成像，覆盖日冕全热波段范围；
2. 支持2至3秒的曝光时长，在静态观测条件下，低温日冕成像通道的信噪比可达100；在高温通道发生耀斑时同样可达到该信噪比，仪器动态范围最高可达10000；
3. 可实现长达数月的近乎连续观测：7个极紫外（EUV）波段（94、131、171、193、211、304及335埃）的观测时间间隔为12秒，2个紫外（UV）波段（1600和1700埃）的观测时间间隔为24秒；
4. 在特殊观测模式下，AIA可通过选取部分波段通道、或采用视场裁剪模式，在符合仪器分配的遥测带宽限制的前提下，以更高的时间分辨率获取太阳成像数据。