Results 121 to 130 of about 765 (166)

Laser Altimetry for Low-flying Agricultural Aircraft

Transactions of the ASAE, 1994
A laser-based altimetry system was developed to measure the low above-ground-level (AGL) altitudes that agricultural aircraft typically encounter during aerial applications. The laser altimetry system was evaluated on-board an aircraft under various conditions.
null Y. M. Koo, null A. R. Womac, null J. A. Eppstein   +2 more
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Airborne laser altimetry in alluviated landscapes

Archaeological Prospection, 2005
AbstractScanning airborne laser altimetry, usually referred to as LiDAR, generates high spatial resolution, high accuracy elevation data. The technique has found considerable use in the earth sciences, for example for flood modelling and prediction. This paper examines some geoarchaeological applications for LiDAR in alluviated landscapes.
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Stream morphometry analysis by airborne laser altimetry

2014 IEEE Geoscience and Remote Sensing Symposium, 2014
The river characteristics have played an important role for hydrological models. Sediments supplied from landslides may affect the river channel morphological changes in different reaches or magnitude; namely, the riverbed morphology can be related to disaster events.
null Ming-Chee Wu, null Mon-Shieh Yang, null Jin-King Liu   +2 more
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Laser Altimetry in the Selene Project

1997
Laser altimetry of the Moon is now under investigation as a part of the RISE project in the Moon-Orbiting exploration (SELENE; SELenological and ENgineering Explorer) by Japan in 2002–2003. Main objective of this measurement is to construct a precise and global topography of the moon with the 5m vertical resolution and with a center-to-center along ...
Hiroshi Araki, Masatsugu Ooe, Tsuneya Tsubokawa, Seiitsu Tsuruta, Hideo Hanada, Kousuke Heki, Nobuyuki Kawano, Ryo-ichi Kouda, Jyun-ya Terasono, Noriyuki Namiki, Hiromichi Maruyama   +10 more
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Slicer Laser Altimetry In The Eastern Caribbean

Surveys in Geophysics, 2001
Data acquired by the airborne Scanning Lidar Imager of Canopies by EchoRecovery (SLICER) laser altimeter provided high-resolution digital topographicdata over Puerto Rico, the Dominican Republic and several of the Lesser AntillesIslands. The instrument was developed by the NASA-Goddard Space Flight Center.It has the capability of multibeam resolution ...
P. Jansma, G. Mattioli, A. Matias
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Accurate height information from airborne laser-altimetry

IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 2002
High single point precision and high point density can be obtained by airborne laser-altimetry, using GPS positioning and INS attitude determination. In this paper the authors analyse the main error sources, including: (1) internal laser sensor errors, (2) GPS and INS errors, (3) atmospheric effects, (4) terrain roughness, reflectivity and slope, (5 ...
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Fractal modeling of airborne laser altimetry data

Remote Sensing of Environment, 1997
Abstract Airborne laser altimetry is a remote sensing technique that can provide high resolution data on the roughness of the landscape both for estimating water balance components and for distinguishing between landscapes. Models of the scale-dependent roughness are needed to find scales most appropriate for these purposes.
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Mapping Shoreline Position Using Airborne Laser Altimetry

Journal of Coastal Research, 2004
This paper examines the feasibility of using LIDAR surveys to update existing historical shoreline data sets by comparing contour shorelines and the high water line (HWL) at eight study locations in North and South Carolina. The analysis was based on airborne LIDAR topography and orthoimagery collected simultaneously during June 2000.
William Robertson, Dean Whitman, Keqi Zhang, Stephen P. Leatherman   +3 more
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Laser altimetry waveform measurement of vegetation canopy structure

Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium, 2005
A profiling airborne laser altimeter system operating at 1.06 /spl mu/m has been developed to provide rapid, direct measurement of vegetation canopy structure by digitization of the amplitude versus time history of return laser pulse energy. The resulting waveforms are a measure of the vertical distribution of reflecting elements within a single laser ...
D.J. Harding, J.B. Blair, J.B. Garvin, W.T. Lawrence   +3 more
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Laser altimetry and lidar from ICESat/GLAS

IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217), 2002
In December 2001, a spaceborne laser altimeter will be launched into a near-polar, near-circular orbit to measure changes in polar ice-sheet topography, as well as along-track land and ocean topography. The ice-sheet measurements will address fundamental questions about the growth or shrinkage of the polar ice-sheets and their contribution to current ...
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