Preflight diffuser's calibration of carbon dioxide spectrometer of TanSat

Long WANG; Chao LIN; Zhen-hua JI; Yu-quan ZHENG; Yan-meng BI

doi:10.3788/OPE.20182608.1967

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Preflight diffuser's calibration of carbon dioxide spectrometer of TanSat

Modern Applied Optics | 更新时间：2020-08-13

- Preflight diffuser's calibration of carbon dioxide spectrometer of TanSat
- Optics and Precision Engineering Vol. 26, Issue 8, Pages: 1967-1976(2018)
- 作者机构：
  
  1.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  2.国家卫星气象中心, 北京 100081
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182608.1967
  CLC： TP731;V11
- Received：15 March 2018，
  
  Accepted：25 April 2018，
  
  Published：25 August 2018
- 稿件说明：
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Long WANG, Chao LIN, Zhen-hua JI, et al. Preflight diffuser's calibration of carbon dioxide spectrometer of TanSat[J]. Optics and precision engineering, 2018, 26(8): 1967-1976.
DOI：

Long WANG, Chao LIN, Zhen-hua JI, et al. Preflight diffuser's calibration of carbon dioxide spectrometer of TanSat[J]. Optics and precision engineering, 2018, 26(8): 1967-1976. DOI： 10.3788/OPE.20182608.1967.

摘要

为了提高CO

探测仪的在轨辐射定标精度，建立了在轨辐射校正原理，并对关键环节漫反射板的制备、BRDF定标和应用进行了系统的研究。根据CO

探测仪的工作原理与系统组成，介绍了星上定标设备和在轨辐射定标策略，确定了漫反射板的制备方法和优化工艺参数，制定了以标准灯和标准探测器为传递链路的漫反射板BRDF的精确定标方法。对漫反射板基准BRDF、角度修正因子和半球反射率进行了测试，对其实验室定标精度进行了分析，并通过在轨初期的应用结果予以验证。发射前的定标结果表明，漫反射板在760 nm、1 610 nm和2 060 nm 3个波段的定标精度均优于3%。在轨初期的测试结果表明CO

探测仪1 610 nm波段在轨绝对辐射定标精度优于5%。CO

探测仪漫反射板的定标结果满足仪器辐射定标对漫反射板定标的精度要求。

Abstract

In order to improve the on-orbit calibration accuracy of a CO

spectrometer

the principle of on-orbit radiation correction was established

and key aspects such as the fabrication

BRDF calibration

and application of a diffuser were systematically studied. Based on the working principle and system composition of the CO

spectrometer

the device and strategy for performing the on-orbit radiation calibration were introduced

and the fabrication method and optimization of the process parameters of the diffuser were established. Next

an accurate calibration method with lamps and detectors as transmission standards for the diffuser's BRDF are developed. The reference BRDF

angle correction factor

and hemispherical reflectivity of the diffuser were tested. In addition

the calibration accuracy in the laboratory was analyzed and subsequently verified by the application results obtained during the initial stage of the orbit. The results obtained before the launch show that the calibration accuracy of the diffuser was better than 3% for all three bands at 760 nm

1 610 nm

and 2 060 nm. The initial test results on orbit indicate that the accuracy of the absolute radiation calibration of the CO

spectrometer at 1 610 nm was better than 5%. These results can satisfy the accuracy requirements for the diffuser radiation calibration of the CO

spectrometer.

关键词

Keywords

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