2012年1月9日，我国成功发射了第一颗民用三线阵立体测图卫星“资源三号测绘卫星”，资源三号测绘卫星配置2台分辨率优于3．5m、幅宽优于50km的前后视全色TDICCD相机，1台分辨率优于2．1m、幅宽优于50km的正视全色TDICCD相机和1台分辨率优于5．8m的多光谱相机；为了保证精度精度和可靠性，资源三号测绘卫星采用大平台、并配置双频GPS以及多个陀螺，经过处理，资源三号无控制点直接定位优于15m，带控制点高程精度优于3m，平面精度优于4m，完全满足1：50000测图精度。%On January 9th, 2012, China launched its first civilian three-line-array stereo mapping satellite-- ZY-3. ZY-3 is equipped with 2 front and back view TDI CCD cameras having the resolution better than 3.5 m and the width better than 50 km, 1 TDI CCD camera with the resolution better than 2.1 m and the width better than 50 km and 1 multispectral camera with the resolution better than 5.8m. In order to ensure accuracy and reliability, ZY-3 adopts a large platform which is equipped with double-frequency GPS and more gyroes. ZY-3 obtains its geolocation accuracy better than 15 m without GCPs, geolocation accuracy better than 3 m and plane geolocation accuracy better than 4 m with GCPs which completely satisfies 1 ： 50 000 mapping precision.
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