ATM Coastal Topography--Louisiana, 2001: UTM Zone 15 (Part 1 of 2)

A first-surface elevation map was produced cooperatively from remotely sensed, geographically referenced elevation measurements by the U.S. Geological Survey (USGS) and National Aeronautics and Space Administration (NASA). Elevation measurements were collected over the area using the NASA Airborne Topographic Mapper (ATM), a scanning lidar system that measures high-resolution topography of the land surface. The ATM system is deployed on a Twin Otter or P-3 Orion aircraft and incorporates a green-wavelength laser operating at pulse rates of 2 to 10 kilohertz. Measurements from the laser-ranging device are coupled with data acquired from inertial navigation system (INS) attitude sensors and differentially corrected global positioning system (GPS) receivers to measure topography of the surface at accuracies of +/-15 centimeters.

For more information on Lidar science and the Experimental Advanced Airborne Research Lidar (EAARL) system and surveys, see http://ngom.usgs.gov/dsp/overview/index.php and http://ngom.usgs.gov/dsp/tech/eaarl/index.php .

本地表高程图由美国地质调查局（U.S. Geological Survey, USGS）与美国国家航空航天局（National Aeronautics and Space Administration, NASA）合作，基于遥感获取的地理参考高程测量数据制作而成。该区域的高程测量数据由美国国家航空航天局机载地形测绘仪（Airborne Topographic Mapper, ATM）采集，这是一套用于获取陆地表面高分辨率地形的扫描式激光雷达系统。该机载地形测绘仪搭载于双水獭（Twin Otter）或P-3猎户座（P-3 Orion）飞机之上，配备工作脉冲频率为2至10千赫的绿色波长激光器。该激光测距设备获取的测量数据，与惯性导航系统（Inertial Navigation System, INS）姿态传感器及经差分修正的全球定位系统（Global Positioning System, GPS）接收机采集的数据进行融合，可实现精度达±15厘米的地表地形测量。

如需了解更多激光雷达科学、实验型先进机载研究激光雷达（Experimental Advanced Airborne Research Lidar, EAARL）系统及相关勘测的相关信息，请访问：http://ngom.usgs.gov/dsp/overview/index.php 与 http://ngom.usgs.gov/dsp/tech/eaarl/index.php。