Results 51 to 60 of about 3,302 (221)

Python software tools for GNSS interferometric reflectometry (GNSS-IR)

GPS Solutions, 2020
[EN] Global Navigation Satellite System (GNSS) interferometric reflectometry, also known as the GNSS-IR, uses data from geodetic-quality GNSS antennas to extract information about the environment surrounding the antenna. Soil moisture moni-toring is one of the most important applications of the GNSS-IR technique. This manuscript presents the main ideas
Angel Martín, Raquel Luján, Ana Belén Anquela   +2 more
openaire   +3 more sources

GNSS interferometric reflectometry signature‐based defense [PDF]

NAVIGATION, 2020
Résumé Les signaux du système mondial de navigation par satellite (GNSS) sont vulnérables aux interférences radiofréquence (RFI) et à l'usurpation d'identité. La détection RFI est devenue triviale avec de nombreux algorithmes de détection disponibles et intégrés dans les récepteurs GNSS ; ce n'est pas le cas avec l'usurpation d'identité.
Steven W. Lewis, C. Edward Chow, Felipe Geremia‐Nievinski, Dennis M. Akos, Sherman Lo   +4 more
openaire   +1 more source

Time-domain Statistics of the Electromagnetic Bias in GNSS-Reflectometry

Remote Sensing, 2015
Global Navigation Satellite Systems-Reflectometry (GNSS-R) is an emerging remote sensing technique that uses navigation signals reflected on the Earth’s surface as sources of opportunity for scatterometry and altimetry.
Ali Ghavidel, Adriano Camps
doaj   +1 more source

Comparison and Synergy of BPSK and BOC Modulations in GNSS Reflectometry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Signals from global navigation satellite systems (GNSSs) have been advocated as opportunities for remote sensing of the Earth. In the multi-GNSS era, signals from different constellation, at different frequency, and under different modulation are ...
Jyh-Ching Juang, Chen-Tsung Lin, Yung-Fu Tsai   +2 more
doaj   +1 more source

Introducing Reflected GNSS TEC Data Into ANCHOR Ionospheric Data Assimilation Model

Space Weather, Volume 24, Issue 5, May 2026.
Abstract ANCHOR is a novel data assimilation (DA) algorithm developed at the U.S. Naval Research Laboratory to improve ionospheric nowcasting by increasing accuracy and decreasing computational cost. As a parameterized DA model, ANCHOR represents the ionosphere using physical parameters such as the F2 layer peak (Nm $Nm$F2), which characterizes a ...
Brenna Royersmith, Victoriya V. Forsythe, Brian Breitsch, Meghan R. Burleigh, Kate A. Zawdie, Y. Jade Morton   +5 more
wiley   +1 more source

GNSS Interferometric Reflectometry for Station Location Suitability Analysis [PDF]

, 2021
<p>National geodetic reference systems can be continuously monitored using applications of Global Navigation Satellite Systems (GNSS). Within these reference systems, Continuously Operating GNSS Reference Stations (CORSs) are often employed to provide 24/7 satellite tracking data.
Jeffrey Verbeurgt, Ellen Van De Vijver, Cornelis Stal, Alain De Wulf   +3 more
openaire   +2 more sources

Low-Cost GNSS-R Altimetry on a UAV for Water-Level Measurements at Arbitrary Times and Locations

Sensors, 2019
Together with direct Global Navigation Satellite System (GNSS) signals, the signals reflected at the water surface can be received by an unmanned aerial vehicle (UAV).
Kaoru Ichikawa, Takuji Ebinuma, Masanori Konda, Kei Yufu   +3 more
doaj   +1 more source

Airborne GNSS Reflectometry for Water Body Detection

Remote Sensing, 2021
This article is dedicated to the study of airborne GNSS-R signal processing techniques for water body detection and edge localization using a low-altitude airborne carrier with high rate reflectivity measurements.
Hamza Issa, Georges Stienne, Serge Reboul, Mohamad Raad, Ghaleb Faour   +4 more
doaj   +1 more source

Monitoring of the Transient Sea Level Variations Associated With Hurricane‐Induced Storm Surges by GNSS‐IR

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract As global climate change intensifies, hurricane‐induced storm surges are becoming more frequent and severe. While Global Navigation Satellite System‐Interferometric Reflectometry (GNSS‐IR) is widely used to monitor sea level variations, its capability to detect rapid and extreme events remains limited.
Xin Chang, Zuozhu Tan, Kai Liu, Zhao Li, Nico Sneeuw, Qusen Chen, Dawei Li, Taoyong Jin, Weiping Jiang   +8 more
wiley   +1 more source

Computation Approach for Quantitative Dielectric Constant from Time Sequential Data Observed by CYGNSS Satellites

Remote Sensing, 2021
This paper describes a computation method for obtaining dielectric constant using Global Navigation Satellite System reflectometry (GNSS-R) products. Dielectric constant is a crucial component in the soil moisture retrieval process using reflected GNSS ...
Junchan Lee, Sunil Bisnath, Regina S.K. Lee, Narin Gavili Kilane   +3 more
doaj   +1 more source