光学测绘卫星地面检校场设计及测量应用

Ground calibration field design and measurement application of optical mapping satellite

针对光学测绘卫星地面检校场地物几何和辐射参数的高精度、大范围、实时同步测量需求,文章分析了几何标志点定位、地物辐射特性、大气特性等地面测量的主要任务和作用,提出了集几何和辐射于一体的地面检校场综合测量方法,设计了贯穿卫星过境前、中、后全过程的地面检校场几何辐射测量技术流程,采用RTK GPS测量、自动气象站、太阳辐射计等多种仪器设备,实现了对靶标地物的精确放样布设、标志点的几何定位、大气特性与地物特性参数等测量。经资源三号卫星几何辐射检校试验结果验证,达到了光学立体卫星几何辐射检校场地物测量的技术要求,对提高测绘遥感卫星的几何和辐射质量以及定量化应用水平具有参考作用。

Aiming at the demands of high precision,large scope and real time measurement in optical stereo satellite ground calibration field,the paper analyzed the tasks and functions of terrestrial survey including ground geographic positioning,radiometric character,atmosphere character and so on,proposed an measurement of ground calibration field integrating geometric with radiometric schemes,designed the geometric and radiometric measurement workflow throughout the satellite passing of before,during and after time,and used multiply equipment such as RTK GPS,automatic weather station,solar radiation and so on to realize the ground targets positioning,laying and radiation measuring,reflective spectral measuring and atmosphere measuring.Experimental result of ZY3 satellite geometric and radiometric calibration showed that the technological requirement of ground target measurement by geometric and radiometric calibration field of optical three-dimensional satellite,which would provide a reference for the quality promotion of surveying and mapping satellites and the level improvement of their quantitative application.