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相关概念视频

Instrument Calibration01:12

Instrument Calibration

177
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
177
Flame Photometry: Overview01:02

Flame Photometry: Overview

550
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
550

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Updated: Jun 24, 2025

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
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用GLAMR进行基于探测器的绝对放射测量校准的不确定性预算.

Zhipeng Wang, Julia Barsi, Kurtis Thome

    Applied optics
    |June 10, 2024
    PubMed
    概括

    使用戈达德激光绝对辐射测量 (GLAMR) 系统的基于探测器的新方法显著提高了遥感仪器的绝对辐射测量校准 (RadCal) 精度. 这一进步对于气候研究至关重要,因为它可以达到不确定性高于0.6%.

    科学领域:

    • 遥感 遥感 遥感 遥感
    • 计量学 计量学 计量学
    • 光学工程是指光学工程.

    背景情况:

    • 精确的绝对射线测量校准 (RadCal) 对遥感应用至关重要,传统方法的不确定性为2%或更高.
    • 气候研究需要比传统的RadCal技术目前可以实现的更高的准确性.
    • 基于探测器的校准为提高准确度提供了一条道路.

    研究的目的:

    • 使用GLAMR系统对基于探测器的绝对RadCal进行全面的不确定性分析.
    • 在GLAMR RadCal过程中识别和量化不确定性来源.
    • 为了证明远程传感仪器校准准确度提高的潜力.

    主要方法:

    • 利用戈达德激光绝对辐射测量 (GLAMR) 系统进行基于探测器的校准.
    • 雇员转移放射计在NIST校准,作为可追溯测量的标准.
    • 测量了遥感仪器的绝对光谱响应函数.
    • 进行了详细的不确定性分析,检查了GLAMR系统的来源,测试配置和数据处理.

    主要成果:

    • 在350-950 nm实现了0.3% (k=1) 以上的校准不确定性,在950-2300 nm达到0.6% (k=1) 以上的校准不确定性 (不包括吸水区域).

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  • 量化了各种不确定性来源的贡献,突出了最有影响力的因素.
  • 证明可追溯到国际单位系统.

    • 结论:

    • 该GLAMR系统使遥感仪器的绝对射线测量校准高度准确.
    • 与传统方法相比,基于探测器的方法显著降低了不确定性.
    • 对校准过程的进一步改进可以带来更高的准确性.