Results 91 to 100 of about 72,223 (218)

Review of Assimilating Spaceborne Global Navigation Satellite System Remote Sensing Data for Tropical Cyclone Forecasting

Remote Sensing
Global Navigation Satellite System (GNSS) Radio Occultation (RO) and GNSS Reflectometry (GNSS-R) are the two major spaceborne GNSS remote sensing (GNSS-RS) techniques, providing observations of atmospheric profiles and the Earth’s surface. With the rapid
Weihua Bai, Guanyi Wang, Feixiong Huang, Yueqiang Sun, Qifei Du, Junming Xia, Xianyi Wang, Xiangguang Meng, Peng Hu, Cong Yin, Guangyuan Tan, Ruhan Wu   +11 more
doaj   +1 more source

One‐Hundred Fundamental, Open Questions to Integrate Methodological Approaches in Lake Ice Research

Water Resources Research, Volume 61, Issue 5, May 2025.
Abstract The rate of technological innovation within aquatic sciences outpaces the collective ability of individual scientists within the field to make appropriate use of those technologies. The process of in situ lake sampling remains the primary choice to comprehensively understand an aquatic ecosystem at local scales; however, the impact of climate ...
Joshua Culpepper, Sapna Sharma, Grant Gunn, Madeline R. Magee, Michael F. Meyer, Eric J. Anderson, Chris Arp, Sarah W. Cooley, Wayana Dolan, Hilary A. Dugan, Claude R. Duguay, Benjamin M. Jones, Georgiy Kirillin, Robert Ladwig, Matti Leppäranta, Di Long, John J. Magnuson, Tamlin Pavelsky, Sebastiano Piccolroaz, Dale M. Robertson, Bethel G. Steele, Manu Tom, Gesa A. Weyhenmeyer, R. Iestyn Woolway, Marguerite A. Xenopoulos, Xiao Yang   +25 more
wiley   +1 more source

Retrieval of Ocean Surface Wind Speed Using Reflected BPSK/BOC Signals

Remote Sensing, 2020
The Global Navigation Satellite System (GNSS) has become a valuable resource as a remote sensing technique. In the past decade, the use of reflected GNSS signals for sensing the Earth, also known as GNSS reflectometry (GNSS-R), has grown rapidly.
Hao-Yu Wang, Jyh-Ching Juang
doaj   +1 more source

Scene setting for the ESA hydroGNSS GNSS-Reflectometry scout mission [PDF]

, 2020
HydroGNSS is a mission concept selected by ESA as a Scout candidate, and consists of a 40 kg satellite that addresses land hydrological parameters using the technique of GNSS Reflectometry, a form of bistatic L-Band radar using satnav signals as the ...
Tossaint, Michel, Pierdicca, Nazzareno, Rautiainen, Kimmo, Blunt, Paul, Foti, Giuseppe, Unwin, Martin, Cardellach, Estel, Worsley, Elliott   +7 more
core   +1 more source

Potential Applications of GNSS-R Observations over Agricultural Areas: Results from the GLORI Airborne Campaign

Remote Sensing, 2018
The aim of this study is to analyze the sensitivity of airborne Global Navigation Satellite System Reflectometry (GNSS-R) on soil surface and vegetation cover characteristics in agricultural areas.
Mehrez Zribi, Erwan Motte, Nicolas Baghdadi, Frédéric Baup, Sylvia Dayau, Pascal Fanise, Dominique Guyon, Mireille Huc, Jean Pierre Wigneron   +8 more
doaj   +1 more source

GPS for Microsatellites - Status and Perspectives [PDF]

, 2007
GPS receivers nowadays provide a well established system for tracking of spacecraft in low-Earth orbit (LEO). In addition, GPS receivers serve as instruments for geodetic and atmospheric research on an ever growing number of science missions.
Helm, Achim, Markus Markgraf, Garcia-Fernandez, Miquel, Oliver Montenbruck, Montenbruck, Oliver, Markgraf, Markus, Miquel Garcia-fern, Achim Helm   +7 more
core  

Separation of Overlapped Direct and Reflected Waveforms for Low-Altitude UAV-Based GNSS-R Altimetry

Remote Sensing
GNSS reflectometry (GNSS-R) altimetry has been widely used for retrieving surface elevation over oceans, cryosphere, and land. Recently, UAV-borne GNSS-R systems have gained attention due to their flexibility for low-altitude and localized observations ...
Ziyin Xu, Xianyi Wang, Junming Xia, Yueqiang Sun, Cheng Liu, Zhuoyan Wang, Yusen Tian, Tongsheng Qiu, Dongwei Wang   +8 more
doaj   +1 more source

Signal processing for GNSS reflectometry

Traitement du signal pour la télédétection par GNSS La réflectométrie par système de navigation par satellite, ou GNSS-R, est l'étude des signaux de géolocalisation réfléchis sur la surface de la Terre. Ces signaux dits d'opportunité, souvent perçus comme des nuisances pour le bon fonctionnement des récepteurs de navigation, sont en ...
openaire   +2 more sources

GNSS multipath reflectometry for coastal sea level monitoring: Extended dynamic model based on the sea vertical acceleration

, 2017
peer reviewedGlobal navigation satellite system multipath reflectometry (GNSS-MR) uses signals of opportunity at L-band frequency. GNSS-MR using signal-to-noise ratio (SNR) measured with commercial off-the-shelf geodetic-quality equipment has proved ...
van Dam, Tonie, TABIBI, Sajad, Geremia-Nievinski, Felipe   +2 more
core   +1 more source

Blind Adaptive Beamformer Based on Orthogonal Projections for GNSS [PDF]

, 2012
The quality of the ranging data provided by a global navigation satellite systems (GNSS) receiver largely depends on the synchronization error, that is, on the accuracy of the propagation time-delay estimation of the line-of-sight (LOS) signal.
Noll, Tobias G., Meurer, Michael, Antreich, Felix, Sgammini, Matteo, Kurz, Lothar   +4 more
core