非跟踪式太阳辐射监测仪在轨数据处理方法研究

At present, there is not effective data processing method for the remote sensing data of non-solar-pointed space solar irradiance monitor SIMB. The existing data processing scheme of space irradiance compensation and correction factors is adopted to preprocess the SIMB data. Compared with the data of international high-precision radiometer working on orbit simultaneously, the processed data are shifted apparently, and the difference is great that reaches ±2 W/m2. In the project, aiming at the problem of the serious shifting of the preprocessed data, the radiometer construction, the working principle and the measurement method are researched deeply to find the primary cause of data shifting and the factors affecting irradiance precision. Then the data processing method is used to improve the measurement precision. The purpose of this project is to establish the routine data processing method of non-solar-pointed space solar irradiance monitor and try to make the measured result of non-solar-pointed solar irradiance monitor approaches to that of international high-precision solar-pointed radiometer working on orbit simultaneously. The difference is less than ±0.5 W/m2.

目前，对于在轨运行的非跟踪式太阳辐射监测仪SIMB的遥感数据，还没有有效的数据处理方法。现有的方案是采用背景辐射补偿及校正因子对数据进行预处理，其处理结果存在严重的数据漂移，与国际上同期在轨运行的高精度辐射计的测量结果比对，差异较大，约±2 W/m2。本项目针对预处理数据存在严重的数据漂移的问题，通过研究辐射计的结构、工作原理及测量方法，深入仪器内部寻找引起数据漂移的原因及影响太阳辐照度精度的因素，通过数据处理方法来提高仪器的测量精度。本项目的研究目标是建立非跟踪式太阳辐射监测仪在轨数据处理的常规方法，力求非跟踪式太阳辐射监测仪的测量结果接近国际上同期在轨运行的高精度跟踪式辐射计的测量结果，差异小于±0.5 W/m2。