Results 81 to 90 of about 623,780 (223)

Radar First Echo Detection With Spaceborne Precipitation Radars

Journal of Geophysical Research: Atmospheres
Abstract The radar “first echo” appears in a fresh growing cloud when hydrometeors grow to large enough sizes to be detected by radar. Using 26‐year observations by the Ku band radars onboard the Global Precipitation Mission and the Tropical Rainfall Measurement Mission satellites, isolated pixels with detectable radar echoes at ...
Chuntao Liu, Earle Williams
openaire   +1 more source

A primer on forest structure measurement with lidar for ecologists

Ecosphere, Volume 17, Issue 8, August 2026.
Abstract Light detection and ranging (lidar) technology has fundamentally advanced the way we measure forest structure, facilitating new insights into ecological processes. Lidar for forest ecology applications is deployed on multiple types of platforms that operate from the ground, air, or space, and each has associated strengths and limitations ...
K. C. Cushman, Kamil Král, Angelica M. Almeyda Zambrano, Eben N. Broadbent, Martin Krůček, Alice Rosen, Sean M. McMahon   +6 more
wiley   +1 more source

Performance Investigation on Scan-On-Receive and Adaptive Digital Beam-Forming for High-Resolution Wide-Swath Synthetic Aperture Radar [PDF]

, 2009
The work investigates the performance of the Smart Multi-Aperture Radar Technique (SMART) Synthetic Aperture Radar (SAR) system for high-resolution wide-swath imaging based on Scan-on-Receive (SCORE) algorithm for receive beam steering.
Bordoni, Federica, Younis, Marwan, Gebert, Nicolas, Krieger, Gerhard, Makhoul Varona, Eduardo   +4 more
core  

Multidimensional Radar Waveforms: A New Paradigm for the Design and Operation of Highly Performant Spaceborne Synthetic Aperture Radar Systems [PDF]

, 2007
This paper introduces and analyses the innovative paradigm of multidimensional waveform encoding for spaceborne synthetic aperture radar (SAR). The combination of this technique with digital beamforming on receive enables a new class of highly ...
Alberto Moreira, Moreira, Alberto, Nicolas Gebert, Gebert, Nicolas, Krieger, Gerhard, Gerhard Krieger   +5 more
core   +1 more source

Large‐scale characterization of horizontal forest structure from remote sensing optical images

Remote Sensing in Ecology and Conservation, Volume 12, Issue 4, Page 611-628, August 2026.
Sub‐meter resolution remote sensing data and tree crown segmentation techniques hold promise in offering detailed information that can support the characterization of forest structure from a horizontal perspective, offering new insights in the tree crown structure at scale.
Xin Xu, Martin Brandt, Xiaowei Tong, Maurice Mugabowindekwe, Yuemin Yue, Sizhuo Li, Qiue Xu, Siyu Liu, Florian Reiner, Kelin Wang, Zhengchao Chen, Yongqing Bai, Rasmus Fensholt   +12 more
wiley   +1 more source

SIREV - Sector Imaging Radar for Enhanced Vision [PDF]

, 2001
SIREV (Sector Imaging Radar for Enhanced Vision) is an innovative radar system which can supply high-quality images of a sector in front of an aircraft under almost every weather condition.
Witte, Franz, Mittermayer, Josef, Wendler, Michael, Moreira, Alberto, Krieger, Gerhard   +4 more
core  

Technologies for high-precision automatic georeferencing and high-level processing of spaceborne SAR images

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение
Georeferencing quality is one of the main characteristics of the Earth’s surface images generated by spaceborne synthetic aperture radars. The paper considers the problem of automatic high-precision georeferencing of spaceborne synthetic aperture radar ...
V. A. Ushenkin
doaj   +1 more source

Observing glacier elevation changes from spaceborne optical and radar sensors – an inter-comparison experiment using ASTER and TanDEM-X data [PDF]

The Cryosphere
Observations of glacier mass changes are key to understanding the response of glaciers to climate change and related impacts, such as regional runoff, ecosystem changes, and global sea level rise.
L. Piermattei, L. Piermattei, L. Piermattei, M. Zemp, C. Sommer, F. Brun, M. H. Braun, L. M. Andreassen, J. M. C. Belart, E. Berthier, A. Bhattacharya, L. Boehm Vock, T. Bolch, T. Bolch, A. Dehecq, I. Dussaillant, D. Falaschi, D. Falaschi, C. Florentine, D. Floricioiu, C. Ginzler, G. Guillet, R. Hugonnet, R. Hugonnet, R. Hugonnet, M. Huss, M. Huss, M. Huss, A. Kääb, O. King, C. Klug, F. Knuth, L. Krieger, J. La Frenierre, R. McNabb, C. McNeil, R. Prinz, L. Sass, T. Seehaus, D. Shean, D. Treichler, A. Wendt, R. Yang   +42 more
doaj   +1 more source

Remote Sensing During the 2025 Los Angeles Wildfires

AGU Advances, Volume 7, Issue 5, August 2026.
Abstract The January 2025 Los Angeles County wildfires burned more than 50,000 acres, destroyed more than 16,000 structures, and caused 31 deaths. This Commentary examines how NASA's Disasters Program coordinated with response organizations to deliver 22 satellite and airborne products during the fires, even as the Eaton Fire forced the Jet Propulsion ...
Julie Rolla, Kimberley Miner, Clayton Elder, Eric Howard, Julia Milton, Nathan Spangler   +5 more
wiley   +1 more source

Clutter rejection for MTI radar using a single antenna and a long integration time [PDF]

, 2011
Moving Target Indicators (MTI) are airborne radar systems designed to detect and track moving vehicles or aircrafts. In this paper, we address the problem of detecting hazardous collision targets to avoid them.
Jean-Yves Tourneret, Goy, Philippe, Philippe Goy, Tourneret, Jean-Yves, Francois Vincent, Vincent, François   +5 more
core   +1 more source