在MAJIS (月球和木星成像光谱仪) 的校准. 第四章 没有了 放射测量校准 (受邀) 进行
Y Langevin1, F Poulet1, G Piccioni2
1Institut d'Astrophysique Spatiale, CNRS-Université Paris-Saclay, Orsay 91400, France.
The Review of scientific instruments
|November 18, 2024
概括
月球和木星成像光谱仪 (MAJIS) 仪器进行了放射学校准,以确保JUICE任务的准确数据. 在地面和发射后的检查证实了微小的变化,导致更新了飞行仪器传输功能.
科学领域:
- 行星科学 行星科学
- 太空仪器仪表 太空仪器仪表
- 频谱学是一种光谱学.
背景情况:
- 卫星和木星成像光谱仪 (MAJIS) 对JUICE任务至关重要,它提供0.5至5.54微米的光谱数据.
- 马吉斯使用两个频道:可见近红外 (VISNIR) 和红外 (IR).
研究的目的:
- 介绍MAJIS仪器在地面进行的全面放射学校准的结果.
- 描述MAJIS探测器 (H1RG) 的精度和准确性,验证读取程序.
- 为了确定VISNIR和IR通道的仪表传输函数.
主要方法:
- 在集成之前,对VISNIR和IR探测器进行了广泛的探测器表征.
- 确定线性和可操作性作为集成时间和温度的函数.
- 集成MAJIS仪器的辐射测量校准,以确定DN输出单位辐射在视野和光谱范围内.
主要成果:
- 探测器特性验证了读取程序,并提供了线性/可操作性数据.
- 对于每个MAJIS数据元素,确定了仪器传输函数.
- 开发了一种特殊的程序,用于VISNIR频道的放射性校准,由于流浪光.
- 发射后的观察证实了VISNIR和IR通道的轻微变化.
结论:
- 实地校准活动为MAJIS的放射性性能提供了必要的数据.
- 基于发射前和发射后观测的最新仪器传输功能确保准确的飞行数据.
- 在JUICE任务期间,MAJIS已被校准并为其科学目标做好准备.
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