Normal Physics Model of Aerial Remote Sensing Platform and Systemic Accuracy Assessment Variable Baseline-height Ratio

• Main Authors: YAN Lei, LI Yingcheng, ZHAO Shihu, YUAN Xiuxiao, SONG Yan, ZHONG Yubiao, XUE Qingsheng
• Format: Article
• Language: zho
• Published: Surveying and Mapping Press 2018-06-01
• Series: Acta Geodaetica et Cartographica Sinica
• Subjects: systemic accuracy; digital aerial camera; normal physical model of digital aerial camera; variable baseline-height ratio spatial temporal model; single rigid structure; catadioptric optical mirror
• Online Access: http://html.rhhz.net/CHXB/html/2018-6-748.htm

Accuracy is a key factor in high-resolution remote sensing and photogrammetry.The factors that affect accuracy are imaging system errors and data processing errors.Because of the complexity of aerial camera system errors,this paper focuses on the design of digital aerial camera system,to reduce the system error and provide data procession fundamentally.There are many kinds of digital aerial camera system at present,but lacking a unified physical model,which causes the system to be built in multi-camera and multi-rigid model.Such system is complex,costly,and difficult to describe,and is easily affected by factors such as vibration and temperature,so the installed accuracy can only reach millimeter level.For this reason,this paper proposes the unified physical structure of digital aerial camera,which imitates the theory of out-of-field multi-CCD,in-field multi-CCD,and once-imaging and twice-imaging digital camera systems.Considering this,the spatial-temporal representation of the variable baseline-height ratio is established.From the variable baseline-height ratio,we can link the opto-mechanical spatial parameters with the elevation accuracy,so that to achieve connection between the surface elevation with opto-mechanical structural parameter; further designing the twice-imaging digital camera prototype system and the wideband limb imaging spectrometer,which provides prototype for transformation from the current multi-rigid,one-time imaging aerial camera to single rigid structure.Our research has laid a theoretical foundation and prototype references for the construction and industrialization of digital aerial system.