Airborne lidar for profiling of surface topography
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Abstract
A lidar system is described that measures laser pulse time-offlight and the distortion of the pulse waveform for reflection from Earth surface terrain features. This instrument system is mounted on a highaltitude aircraft platform and operated in a repetitively pulsed mode for measurements of surface elevation profiles. The laser transmitter makes use of recently developed short-pulse diode-pumped solid-state laser technology. Aircraft position in three dimensions is measured to submeter accuracy by use of differential Global Positioning System receivers. Instrument construction and performance are detailed.