SPOT 5 HRS立体影像无(稀少)控制绝对定位技术研究

基金项目: 国家973计划资助项目(2006CB701302)

详细信息

Direct Georeferencing of SPOT 5 HRS Imagery Without(or with a Few) Ground Control Point

¹ School of Remote Sensing and Information Engineering,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 国家973计划资助项目(2006CB701302)

摘要: 研究了SPOT 5卫星HRS立体影像的成像原理,构建了无需地面控制点的直接对地绝对定位模型。实验表明,无控制绝对定位结果存在不同程度的系统误差;利用任意位置的1个地面控制点消除系统误差后即可获得较好的平面和高程定位精度;利用1个地面控制点外推580 km进行绝对定位时,平面定位精度仍优于20 m,高程定位精度约10 m,说明卫星轨道本身具有较好的稳定性,显示了本模型具有良好的应用前景。
- SPOT5HRS /
- 立体像对 /
- 直接对地定位 /
- 外推定位
Abstract: The photographic principle of SPOT 5 HRS is discussed in detail.By a series of coordinate system transforming,the rigorous orbit model of direct geo-referencing without ground control point is established.Experimental results of three datasets show that there are systematic errors existed.Once a ground control point is introduced,the result is improved tremendously.Results of 580 km test dataset with one ground control point are still better than 20 m for the planar position and about 10m for the altitude.It shows that the orbit itself is very stable.The HRS imagery has promising potential for various applications.
- SPOT 5 HRS /
- stereo imagery /
- direct georeferencing /
- extrapolative positioning