嵩山遥感定标场靶标反射率的自动测量方法

大气与环境光学学报 ›› 2023, Vol. 18 ›› Issue (2): 141-152.

嵩山遥感定标场靶标反射率的自动测量方法

潘琰 1,2, 李新 1*, 李照洲 3, 张权 1, 张艳娜 1

1 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院通用光学定标与表征技术重点实验室, 安徽合肥230031; 2 中国科学技术大学, 安徽合肥 230026; 3 中国资源卫星应用中心, 北京 100094

收稿日期:2020-12-24 修回日期:2021-05-19 出版日期:2023-03-28 发布日期:2023-04-18
通讯作者: E-mail: xli@aiofm.ac.cn E-mail:xli@aiofm.ac.cn
作者简介:潘琰 (1992- ), 女, 河南商丘人, 博士研究生, 主要从事光学精密仪器设计及卫星遥感器辐射定标技术的研究。 E-mail: Py2015@mail.ustc.edu.cn
基金资助:
国家重点研发计划 (2018YFB0504600, 2018YFB0504604), 中国科学院合肥物质科学研究院院长基金 (YZJJ2019QN5)

Automatic measurement method of target reflectivity at Songshan Remote Sensing Calibration Field

PAN Yan 1,2, LI Xin 1*, LI Zhaozhou 3, ZHANG Quan 1, ZHANG Yanna 1

1 Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China; 3 China Center for Resources Satellite Data and Application, Beijing 100094, China

Received:2020-12-24 Revised:2021-05-19 Published:2023-03-28 Online:2023-04-18
Supported by:
National Key R&D Program of China;CASHIPS Director’s Fund

摘要/Abstract

摘要： 利用自主研制的地表反射自动监测光谱仪 (ARMS) 和可见-短波红外光谱辐照度计 (HIM)，实现了嵩山遥感定标场内三种灰阶靶标反射率的自动测量，并与使用ASD便携式光谱仪人工测量的靶标反射率开展了比对。两种方法的比对结果表明：在400～1600 nm范围内，自动化测量与人工测量的反射率数据在非大气吸收波段的相对偏差优于 ±2%。进一步基于自动化设备的观测数据，分析了2019 年10 月至2020 年11 月场地内的靶标反射率。分析结果表明，受环境变化的影响，嵩山场内灰阶靶标的反射率也会发生变化，且反射率的变化趋势与波长范围及测量区域有关。在整个波段范围内，反射率的标准偏差在 ±2.5%以内。该工作的开展为基于嵩山遥感定标场的自动化、高频次在轨辐射定标提供了有力的技术支撑。

关键词: 嵩山定标场, 在轨替代定标, 灰阶靶标, 光谱反射率

Abstract: Based on the self-developed automated reflectance monitoring spectrometer (ARMS) and hyperspectral irradiance meter (HIM) in visible-shortwave infrared band, the automatic measurement of the reflectance of three gray-scale targets in Songshan Remote Sensing Calibration Field, China, was realized, and the data obtained by the self-developed instruments was compared with the data acquired manually by the ASD portable spectrometer. The comparison results of the two methods show that the relative deviation of the reflectance data is better than ±2% in the range of 400-1600 nm for nonatmospheric absorption band. Then the target reflectance data in the site acquired by the automated equipments from October 2019 to November 2020 was analyzed in details. The analysis results show that the target reflectance of Songshan field is changeable with the environment, and the change trend of reflectance is related to the wavelength range and the measurement area, while the standard deviation of reflectance is within ±2.5% in the whole band. The work provides a strong technical support for the automatic and high-frequency on-orbit radiation calibration based on the Songshan Remote Sensing Calibration Field.

Key words: Songshan Calibration Field, on-orbit vicarious calibration, grayscale target, spectral reflectance

中图分类号:

TP79

潘琰, 李新, 李照洲, 张权, 张艳娜 . 嵩山遥感定标场靶标反射率的自动测量方法[J]. 大气与环境光学学报, 2023, 18(2): 141-152.

PAN Yan , LI Xin , LI Zhaozhou , ZHANG Quan , ZHANG Yanna . Automatic measurement method of target reflectivity at Songshan Remote Sensing Calibration Field[J]. Journal of Atmospheric and Environmental Optics, 2023, 18(2): 141-152.

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