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。
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.
作者
潘琰
李新(指导)
李照洲
张权
张艳娜
PAN Yan;LI Xin;LI Zhaozhou;ZHANG Quan;ZHANG Yanna(Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;China Center for Resources Satellite Data and Application,Beijing 100094,China)
出处
《大气与环境光学学报》
CAS
CSCD
2023年第2期141-152,共12页
Journal of Atmospheric and Environmental Optics
基金
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)。
关键词
嵩山定标场
在轨替代定标
灰阶靶标
光谱反射率
Songshan Calibration Field
on-orbit vicarious calibration
grayscale target
spectral reflectance
