光学测绘卫星几何定标场设计要点

Key points of geometrical calibration field design for optical mapping satellites

在轨几何定标是确保光学测绘卫星影像定位精度的关键环节,目前主要利用在轨获取的卫星影像,采用摄影测量方法来实现,基于航空影像建设的地面几何定标场基础数据是几何定标的重要支撑。本文介绍了光学测绘卫星几何定标场设计的主要内容,包括场地选址需考虑的因素和技术指标的确定方法,进而结合实际生产经验对定标场设计中需要着重关注的天气条件、场地走向、数据更新等问题进行了重点分析,能够为在轨几何定标场的通用设计提供一定参考。

In-orbit geometric calibration is a key step in ensuring the positioning accuracy of optical mapping satellite im-age.At present,the positioning accuracy is achieved by photogrammetric methods using images from on-orbit sallite.The bas-ic data of geometric calibration ground field based on aerial image construction is an important suppot for geometric calibration..The main contents of the geometric calibration field design for optical mapping satellites are introduced in this paper,including the factors to be considered in site selection and the method to determine technical indexes.Then several factors in calibration field design are analyzed based on practical production experience,such as weather conditions,site trend and data update.This experiment can provide some reference for the general design of the on-orbit geometric calibration field.