Results 41 to 50 of about 985 (191)

First Evidence of Mesoscale Ocean Eddies Signature in GNSS Reflectometry Measurements

Remote Sensing, 2020
Feasibility of sensing mesoscale ocean eddies using spaceborne Global Navigation Satellite Systems-Reflectometry (GNSS-R) measurements is demonstrated for the first time.
Mostafa Hoseini, Milad Asgarimehr, Valery Zavorotny, Hossein Nahavandchi, Chris Ruf, Jens Wickert   +5 more
doaj   +1 more source

Exploring CYGNSS mission for surface heat flux estimates and analysis over tropical oceans

Frontiers in Marine Science, 2022
The Cyclone Global Navigation Satellite System (CYGNSS) mission can measure sea surface wind over tropical oceans with unprecedented temporal resolution and spatial coverage, so as to estimate surface latent and sensible heat fluxes (LHF and SHF).
Xiaohui Li, Jingsong Yang, Jingsong Yang, Yunwei Yan, Yunwei Yan, Weiqiang Li, Weiqiang Li   +6 more
doaj   +1 more source

CYGNSS Mission Overview and Preflight Update [PDF]

, 2016
The Cyclone Global Navigation Satellite System (CYGNSS) project, NASA\u27s first Earth Venture Mission, is on schedule to launch in late-2016. CYGNSS will implement a spaceborne earth observation system designed to collect measurements of ocean surface ...
Wells, James, Bonniksen, Christine, Rose, Debra, Rose, Randall, Scherrer, John, Ruf, Christopher   +5 more
core   +1 more source

Enhancing Spatial Resolution of GNSS-R Soil Moisture Retrieval through XGBoost Algorithm-Based Downscaling Approach: A Case Study in the Southern United States

Remote Sensing, 2023
The retrieval of soil moisture (SM) using the Global Navigation Satellite System-Reflectometry (GNSS-R) technique has become a prominent topic in recent years.
Qidi Luo, Yueji Liang, Yue Guo, Xingyong Liang, Chao Ren, Weiting Yue, Binglin Zhu, Xueyu Jiang   +7 more
doaj   +1 more source

Analysis of CYGNSS Data for Soil Moisture Retrieval

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019
Data from the CYGNSS mission, originally conceived to monitor tropical cyclones, are being investigated here for land applications as well. In this paper, a methodology for soil moisture (SM) retrieval from CYGNSS data is presented. The approach derives Level 3 gridded daily SM estimations, over the latitudinal band covered by CYGNSS, at a resolution ...
Maria Paola Clarizia, Nazzareno Pierdicca, Fabiano Costantini, Nicolas Floury   +3 more
openaire   +3 more sources

The Correction Method of Water and Fresnel Reflection Coefficient for Soil Moisture Retrieved by CYGNSS

Remote Sensing, 2023
Spaceborne GNSS-R technology is a new remote sensing method for soil moisture monitoring. Focusing on the significant influence of water on the surface reflectivity of CYGNSS, this paper improved the removal method of water influence according to the ...
Qi Wang, Jiaojiao Sun, Xin Chang, Taoyong Jin, Jinguang Shang, Zhiyong Liu   +5 more
doaj   +1 more source

Beyond SMAP: Can GNSS‐R Platforms Ensure Continuity of Global Soil Moisture Observations?

Water Resources Research, Volume 62, Issue 9, September 2026.
Abstract The absence of a definitive follow‐on strategy for the Soil Moisture Active Passive (SMAP) mission, which has already surpassed its planned mission lifetime, presents a significant challenge for the hydrological science community. GNSS‐Reflectometry (GNSS‐R), which exploits reflected satellite navigation signals, has emerged as a rapidly ...
Ehsan Jalilvand, Sujay V. Kumar, Rajat Bindlish, Jerry W. Wegiel, Mehmet Kurum, Hyunglok Kim, Pang‐Wei Liu, Mahdi Navari   +7 more
wiley   +1 more source

Comparison of SAR and CYGNSS Surface Water Extent Metrics

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Many sensors are suitable for accurate delineation of open water extent, but in vegetated environments, the vegetation canopy can obscure the presence of standing water from detection. Detecting inundation extent in these vegetated environments is especially critical for identifying flooding extent where surface water may exceed flood boundaries and ...
Bruce D. Chapman, Ilaria Mara Russo, Carmela Galdi, Mary Morris, Maurizio di Bisceglie, Cinzia Zuffada, Brandi Downs, Marco Lavalle, Eric Loria, Andrew J. O'Brien 0001   +9 more
openaire   +3 more sources

Assessing GNSS Reflectometry for High‐Latitude 3D Ionospheric Imaging

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract This study investigates whether Global Navigation Satellite System Reflectometry (GNSS‐R) measurements from low‐Earth‐orbit (LEO) satellites can improve three‐dimensional (3D) ionospheric electron density imaging, with a focus on high‐latitude regions. Conventional ionospheric tomography is limited by sparse ground‐based receiver coverage over
Brenna Royersmith, Brian Breitsch, Jade Y. Morton   +2 more
wiley   +1 more source

Tropical Processes Applications for CYGNSS [PDF]

, 2017
The Cyclone Global Navigation Satellite System (CYGNSS) is focused primarily on observing extreme winds in the inner core of tropical cyclones But... Named storms will occur in view of CYGNSS constellation for only a small percentage of the time on orbit
Lang, Timothy J.
core