概括
光盒 (FloX) 仪器显示了随着温度变化而发生的显著放射变化. 这些发现对于确保用于卫星验证的太阳引起的叶绿素光 (SIF) 测量的准确性至关重要.
科学领域:
- 地球和太空科学 地球和太空科学
- 频谱学是一种光谱学.
- 仪器校准仪器的校准
背景情况:
- 光盒 (FloX) 是一种超光谱仪器,用于无人监视的太阳诱导的叶绿素光 (SIF) 和反射度测量.
- FloX仪器对于验证即将推出的光探测器 (FloX) 成像卫星至关重要,需要高精度和连续数据.
- 精确的光谱辐射计校准和了解温度灵敏度对于可靠的FloX数据至关重要.
研究的目的:
- 为了执行一个FloX单元的光谱辐射计校准和温度灵敏度分析.
- 评估环境温度变化对FloX仪器性能的影响.
- 为了量化不同温度范围内的放射变化.
主要方法:
- 一个带有两种光谱仪的FloX单元经过了从0°C到40°C的5°C的热循环测试.
- 从一个由灯照亮的Spectralon面板反射的辐射的外部测量通过光纤进行.
- 测量了SIF光谱范围内的辐射值,并与20°C的名义值进行了比较.
主要成果:
- 平均辐射值显示,高分辨率传感器的变化超过3%,宽带传感器的变化超过4%,相对于20°C.
- 放射性转移被确定为环境温度变化的系统效应.
- 对不确定性贡献的分析证实温度是影响测量的重要因素.
结论:
- 环境温度对FloX仪器的放射测量有很大的影响.
- 必须考虑这些由温度引起的辐射变化,以确保SIF测量的准确性.
- 了解和纠正温度灵敏度对于FloX数据可靠性至关重要,特别是在卫星验证工作中.
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