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High-resolution measurements of surface topography with airborne laser altimetry and the global positioning system

机译：利用机载激光测高和全球定位系统对表面形貌进行高分辨率测量

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Recently, an airborne lidar system that measures laser pulse time-of-flight and the distortion of the pulse waveform upon reflection from earth surface terrain features was developed and is now operational. This instrument is combined with Global Positioning System (GPS) receivers and a two-axis gyroscope for accurate recovery of aircraft position and pointing attitude. The laser altimeter system is mounted on a high-altitude aircraft platform and operated in a repetitively-pulsed mode for measurements of surface elevation profiles at nadir. The laser transmitter makes use of recently developed short-pulse diode-pumped solid-state laser technology in Q-switched Nd:YAG operating at its fundamental wavelength of 1064 nm. A reflector telescope and silicon avalanche photodiode are the basis of the optical receiver. A high-speed time-interval unit and a separate high-bandwidth waveform digitizer under microcomputer control are used to process the backscattered pulses for measurements of terrain. Other aspects of the lidar system are briefly discussed.

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Garvin, James B.; Bufton, Jack L.; Cavanaugh, John F.; Krabill, William B.; Clem, Thomas D.; Frederick, Earl B.; Ward, John L.;
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年度 1991
页码 1-2
总页数 2
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
AIRBORNE EQUIPMENT; AIRBORNE LASERS; FLYING PLATFORMS; GLOBAL POSITIONING SYSTEM; LASER ALTIMETERS; OPTICAL RADAR; REMOTE SENSING; AVALANCHE DIODES; GYROSCOPES; PHOTODIODES; PULSED LASERS; Q SWITCHED LASERS; RADAR RECEIVERS; REFLECTORS; SOLID STATE LASERS; TELESCOPES; TRANSMITTERS; YAG LASERS;

机译：航空设备;机载激光;飞行平台;全球定位系统;激光高度;光学雷达;遥感; aVaLaNCHE DIODEs;陀螺仪;光二极管;脉冲激光; Q开关激光器;雷达接收器;反射器的;固态激光器; TELEsCOpEs;变送器; YaG LasERs;

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High-resolution measurements of surface topography with airborne laser altimetry and the global positioning system

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