Scanning in declination may be achieved by tilting the aerial system .
进行赤纬扫描时，可以把天线倾斜。
2
Aerial photography and photogrammetry, airborne and terrestrial laser scanning, mobile mapping system and GPS positioning contrihuted to the great increase of accuracy and speed of data acquisition.
机载与地面激光扫描、地面移动测量与GPS定位等传感器的精度与速度都有了明显的提高。
3
Scanning in declination may be achieved by tilting the aerial system.