Results 61 to 70 of about 596 (132)

Considerations for Coherent Integration in Spaceborne GNSS-Reflectometry

IEEE Geoscience and Remote Sensing Letters
The fundamental observable in Global Navigation Satellite System Reflectometry (GNSS-R) is the so-called DelayDoppler Map (DDM), which is derived from the cross-correlation of the reflected signal with either the direct signal or a locally generated replica of the transmitted signal as implemented in our algorithm.
Yasir M. O. Abbas, Shah Zahid Khan, Edwar Edwar, Abdul-Halim M. Jallad, Adriano Camps   +4 more
openaire   +1 more source

GNSS reflectometry for land remote sensing applications

, 2023
Soil moisture and vegetation biomass are two essential parameters from a scienti c and economical point of view. On one hand, they are key for the understanding of the hydrological and carbon cycle. On the other hand, soil moisture is essential for agricultural applications and water management, and vegetation biomass is crucial for regional ...
openaire   +4 more sources

GNSS reflectometry and remote sensing: New objectives and results [PDF]

Advances in Space Research, 2010
Advances in Space Research, 46(2), 111-117 ...
Jin, Shuanggen, Komjathy, Attila
openaire   +2 more sources

Evaluating Water Levels From the Surface Water and Ocean Topography (SWOT) Mission in a Hyper‐Tidal Coastal and Estuarine Environment

Earth and Space Science, Volume 12, Issue 7, July 2025.
Abstract The launch of the Surface Water and Ocean Topography (SWOT) satellite in December 2022 started a new era of swath altimetry, introducing an unprecedented global data set of high‐resolution two‐dimensional water level imagery. During its initial calibration and validation phase (cal/val), SWOT conducted daily observations for 3 months providing
I. D. Lichtman, P. S. Bell, C. Gommenginger, C. Banks, F. M. Calafat, J. Brown, S. D. P. Williams   +6 more
wiley   +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

Feasibility Demonstration of Using the Signal‐to‐Noise Ratio Observations From Geodetic GNSS Receivers to Retrieve Dry Snow Density

Water Resources Research, Volume 61, Issue 4, April 2025.
Abstract The geodetic Global Navigation Satellite System (GNSS) receiver has been proven to retrieve snow depth using the phase change rate of the signal‐to‐noise ratio (SNR) observations. Snow density can be related to snow permittivity and is theoretically sensitive to the amplitude of the GNSS reflected signal. However, retrieving snow density using
J. Zhang, W. Wan, H. Liang, W. Ma, B. Liu, C. Liang, Z. Guo, X. Wan   +7 more
wiley   +1 more source

Integrating Advanced Sensor Technologies for Enhanced Agricultural Weather Forecasts and Irrigation Advisories: The MAGDA Project Approach

Remote Sensing
Weather forecasting is essential for agriculture, yet current methods often lack the localized accuracy required to manage extreme weather events and optimize irrigation.
Martina Lagasio, Stefano Barindelli, Zenaida Chitu, Sergio Contreras, Amelia Fernández-Rodríguez, Martijn de Klerk, Alessandro Fumagalli, Andrea Gatti, Lukas Hammerschmidt, Damir Haskovic, Massimo Milelli, Elena Oberto, Irina Ontel, Julien Orensanz, Fabiola Ramelli, Francesco Uboldi, Aso Validi, Eugenio Realini   +17 more
doaj   +1 more source

Innovative and Cost‐Effective Approaches to the Measurement of Sediment Levels in Small Water Reservoirs

Land Degradation &Development, Volume 36, Issue 1, Page 28-38, 15 January 2025.
ABSTRACT Sedimentation in small water reservoirs poses a critical challenge with significant environmental, economic, and social implications. To address this issue, this study will employ three measurement techniques—GNSS RTK Trimble R8s, Echolot HDS LIVE 7 with Active Imaging 3‐in‐1, and the Mivardi Carp Scout bait boat—to assess sediment levels in ...
Stanislav Paseka
wiley   +1 more source

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

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