利用环境减灾二号A/B卫星红外相机数据监测沙尘暴

Monitoring Sand Dust Storms Using Data of Infrared Camera on HJ-2A/B Satellites

针对国产卫星数据在沙尘监测领域应用较少的情况,基于环境减灾二号A/B(HJ-2A/B)卫星搭载的红外相机(IRS)探测数据构建沙尘监测算法。在分析IRS分辨不同沙尘天气场景能力基础上,与中等分辨率成像光谱仪(MODIS)监测结果对比,分析了不同时间尺度下的沙尘遥感监测能力,并讨论了IRS的不足之处。结果表明:环境减灾二号A/B卫星数据质量整体较好,影像可以清晰地呈现陆地、云和沙尘等主要场景的整体轮廓及纹理,有利于准确提取沙尘天气;与MODIS监测沙尘结果相比,IRS的准确率和召回率分别为81%和与57.6%,其时空分布规律基本一致,IRS具备一定的沙尘监测能力;同时,IRS存在数据噪声、定标精度等问题。此研究对国产卫星在大气环境遥感业务中的大力发展应用有参考意义。

In view of the fact that domestic satellite data are rarely used in the field of sand and dust monitoring,a sand and dust monitoring algorithm is constructed based on the detection data of the infrared camera(IRS)carried by the environmental disaster reduction HJ-2A/B satellites.On the basis of analyzing the ability of IRS to distinguish different sand dust weather scenarios,the sand dust remote sensing monitoring ability at different time scales is compared with the MODIS monitoring results,and the shortcomings of IRS are discussed.The results show that the data quality of the environment disaster reduction HJ-2A/B satellites is generally good,and the image can clearly show the overall outline and texture of the main scenes such as land,cloud and dust,which is conducive to the accurate extraction of dust weather.Compared with the dust monitoring results of MODIS,the accuracy and recall rates of IRS are 81%and 57.6%respectively.The temporal and spatial distribution of IRS is basically the same.The IRS camera has a certain dust monitoring ability。At the same time,IRS has data noise,calibration accuracy and other problems.This study has reference significance for the development and application of domestic satellites in the atmospheric environment remote sensing service.