基准星辐射定标的辐射传递链路研究

为进一步提高遥感信息定量化应用水平，提高在轨辐射定标精度和定标频次，提出一种基于基准星的全谱段、全口径在轨绝对辐射定标方法，方法适用于可见近红外谱段；定标传递中辐射基准可溯源至SI(国际单位)。通过比较现有定标方法和基准星辐射定标的优缺点，分析基准星辐射基准溯源特性，建立太阳 基准星 遥感器的辐射传递模型,以高分一号和高分二号卫星为例，其作为待定标遥感器，对基准星定标的约束条件进行仿真分析，得出基准星辐射传递不确定度为13%。仿真结果验证了基准星定标方法的可行性，对遥感器辐射定标精度、频次的进一步提高提供了依据。

Research on radiative transfer chain for proper satellite radiometric calibration

In order to further improve the quantitative application of remote sensing information and increase on-orbit radiometric calibration accuracy and frequency, an absolute radio metric calibration method of full-band, full-aperture based on proper satellite was presented. The method is suitable for the visible-near infrared spectrum, and the radiation standard in the radiative transfer has the SI-traceability. By comparing the advantages and disadvantages of the existing calibration methods, and the proper satellite radiometric calibration, the radiation standard traceability of the proper satellite was analyzed and the radiative transfer model from the sun to the proper satellite, then to the remote sensor was established. Taking GF-1 and GF-2 satellites as remote sensors under calibration, the simulation of the calibration constraints was acquired and the uncertainty of the proper satellite radiative transfer is about 1.3%. The simulation results verify the feasibility of the proper satellite calibration and provide a basis for the improvement of the radio metric calibration for the satellite remote sensors.