Results 141 to 150 of about 827 (179)

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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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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Pushbroom Laser Altimetry using Fiber Lasers and Photon Counting Detectors

2007 Conference on Lasers and Electro-Optics (CLEO), 2007
We report on progress in developing a new swath mapping laser altimeter measurement approach using multiple laser measurement beams, modulated fiber lasers, photon counting detectors, and event timers for future space missions.
James B. Abshire, David J. Harding, Xiaoli Sun, Michael A. Krainak, Tony Seas, Phillip W Dabney   +5 more
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Ancient Multiring Basins on the Moon Revealed by Clementine Laser Altimetry

Science, 1994
Analysis of laser altimetry data from Clementine has confirmed and extended our knowledge of nearly obliterated multiring basins on the moon. These basins were formed during the early bombardment phase of lunar history, have been filled to varying degrees by mare lavas and regional ejecta blankets, and have been degraded by the superposition of large ...
P D, Spudis, J J, Gillis, R A, Reisse
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Derivation of soil surface properties from airborne laser altimetry

IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004
A technique is presented and tested which enables land surface roughness on the vertical scale of a few centimetres to be estimated from an aircraft-mounted scanning laser altimeter, or LiDAR (Light Direction And Ranging) system. While the systematic uncertainty in measuring land elevation using a LiDAR system is around 20 cm, we demonstrate that ...
Ian J. Davenport, Nick Holden, R. J. Pentreath   +2 more
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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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Eolian deformation detection and modeling using airborne laser altimetry

IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004
Monitoring of landscapes or sea bottoms by means of laser altimetry or multibeam results in huge amount of data covering the same area in different epochs. Often stable benchmarks are not available in the area covered. We propose a geodetic/geostatistical method to analyze possible deformations in such area out of time series of data.
Roderik Lindenbergh, Ramon F. Hanssen
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Topography of the Northern Hemisphere of Mercury from MESSENGER Laser Altimetry

Science, 2012
Mercury Inside and Out The MESSENGER spacecraft orbiting Mercury has been in a ∼12-hour eccentric, near-polar orbit since 18 March 2011 (see the Perspective by McKinnon ). Smith et al. (p. 214
Zuber, Maria T., Smith, David E., Phillips, Roger J., Solomon, Sean C., Neumann, Gregory A., Hauck, Steven A., Peale, Stanton J., Barnouin, Olivier S., Head, James W., Johnson, Catherine L., Lemoine, Frank G., Mazarico, Erwan, Sun, Xiaoli, Torrence, Mark H., Freed, Andrew M., Klimczak, Christian, Margot, Jean-Luc, Oberst, Jürgen, Perry, Mark E., McNutt, Ralph L., Balcerski, Jeffrey A., Michel, Nathalie, Talpe, Matthieu J., Yang, Di   +23 more
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Laser Altimetry in Planetary Exploration

2016
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
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Laser altimetry and its application in geographic scanning

Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396), 2002
Laser altimetry is a technique whereby reflections of a laser beam are used to measure the altitude of an aircraft above the ground based on a round trip delay measurement. With current improvements in short laser pulse generation and high resolution time and amplitude measurements, the same technique is now used to measure topographical features of ...
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