Results 41 to 50 of about 1,159,554 (218)

POINTING ANGLE CALIBRATION OF ZY3-02 SATELLITE LASER ALTIMETER USING TERRAIN MATCHING [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
After GLAS (Geo-science Laser Altimeter System) loaded on the ICESat (Ice Cloud and land Elevation Satellite), satellite laser altimeter attracts more and more attention.
G. Li, G. Li, G. Li, X. Tang, X. Tang, X. Tang, X. Gao, X. Gao, X. Gao, J. P. Huang, J. P. Huang, J. Chen, J. Chen, J. Lu, J. Lu   +14 more
doaj   +1 more source

SPACE-BORNE LASER ALTIMETER GEOLOCATION ERROR ANALYSIS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
This paper reviews the development of space-borne laser altimetry technology over the past 40 years. Taking the ICESAT satellite as an example, a rigorous space-borne laser altimeter geolocation model is studied, and an error propagation equation is ...
Y. Wang, Y. Wang, J. Fang, J. Fang, Y. Ai   +4 more
doaj   +1 more source

Fine Calibration Method for Laser Altimeter Pointing and Ranging Based on Dense Control Points

Remote Sensing
Satellite laser altimetry technology, a novel space remote sensing technique, actively acquires high-precision elevation information about the Earth’s surface.
Chaopeng Xu, Fan Mo, Xiao Wang, Xiaomeng Yang, Junfeng Xie, Zhen Wen   +5 more
doaj   +1 more source

Geometric Accuracy Improvement Method for High-Resolution Optical Satellite Remote Sensing Imagery Combining Multi-Temporal SAR Imagery and GLAS Data

Remote Sensing, 2020
With the widespread availability of satellite data, a single region can be described using multi-source and multi-temporal remote sensing data, such as high-resolution (HR) optical imagery, synthetic aperture radar (SAR) imagery, and space-borne laser ...
Quansheng Zhu, Wanshou Jiang, Ying Zhu, Linze Li   +3 more
doaj   +1 more source

A new DEM of the Austfonna ice cap by combining differential SAR interferometry with ICESat laser altimetry [PDF]

Polar Research, 2012
We present a new digital elevation model (DEM) of the Austfonna ice cap in the Svalbard Archipelago, Norwegian Arctic. Previous DEMs derived from synthetic aperture radar (SAR) and optical shape-from-shading have been tied to airborne radio echo-sounding
Geir Moholdt, Andreas Kääb
doaj   +1 more source

Modeling Uncertainty of GEDI Clear-Sky Terrain Height Retrievals Using a Mixture Density Network

Remote Sensing, 2023
Early spaceborne laser altimetry mission development starts in pre-phase A design, where diverse ideas are evaluated against mission science requirements.
Jonathan Sipps, Lori A. Magruder
doaj   +1 more source

Meter‐Scale Roughness of the Lunar Surface

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Small‐scale surface roughness is a key indicator of local geological processes, yet it has not previously been mapped globally on the Moon. We present global meter‐scale surface roughness maps generated from the Lunar Orbiter Laser Altimeter pulses, which record information about surface undulations within the instrument's ∼5 m individual ...
Hephzibah Christopher, Indujaa Ganesh
wiley   +1 more source

A Software Tool for ICESat and ICESat-2 Laser Altimetry Data Processing, Analysis, and Visualization: Description, Features, and Usage

Software
This paper presents a web-based software tool designed to process, analyze, and visualize satellite laser altimetry data, specifically from the Ice, Cloud, and land Elevation Satellite (ICESat) mission, which collected data from 2003 to 2009, and ICESat ...
Bruno Silva, Luiz Guerreiro Lopes
doaj   +1 more source

Deep Reinforcement Learning Based Autonomous Decision‐Making for Cooperative Uncrewed Aerial Vehicles: A Search and Rescue Real World Application

Journal of Field Robotics, Volume 43, Issue 7, Page 4382-4401, October 2026.
ABSTRACT This paper presents the first end‐to‐end framework that combines guidance, navigation, and centralized task allocation for multiple UAVs performing autonomous search‐and‐rescue (SAR) in GNSS‐denied indoor environments. A twin delayed deep deterministic policy gradient controller is trained with an artificial potential field (APF) reward that ...
Thomas Hickling, Maxwell Hogan, Abdulla Tammam, Nabil Aouf   +3 more
wiley   +1 more source

Excimer laser treatment of ZE41 magnesium alloy for corrosion resistance and microhardness improvement [PDF]

, 2010
We would like to acknowledge the financial support of the ‘‘Conseil regional de PACA’’ and Protection des Metaux d’Arenc). The authors are grateful to PMA’s engineers Ms. E. Castellan, Ms. A. Gonthier and Mr. F.
KHALFAOUI, Walid, MASSE, Jean-Eric, AUTRIC, Michel, VALÉRIO, Eric   +3 more
core   +1 more source