Results 31 to 40 of about 723 (178)

Software tools for GNSS interferometric reflectometry (GNSS-IR) [PDF]

GPS Solutions, 2018
GNSS-R interferometric reflectometry (also known as GNSS-IR, or GPS-IR for GPS signals) is a technique that uses data from geodetic-quality GNSS instruments for sensing the near-field environment. In contrast to positioning, atmospheric, and timing applications of GNSS, GNSS-IR uses the signal-to-noise ratio (SNR) data.
Carolyn Roesler, Kristine M. Larson
openaire   +1 more source

Issues on Multi-polarization of GNSS-R for Passive Radar Detection

Leida xuebao, 2015
GNSS Reflectometry (GNSS-R) is a currently developed remote sensing technology which belongs to the passive radar domain. This paper aims to deal with some issues on multi-polarization of GNSS-R technology.
Wan Wei, Li Huang, Hong Yang
doaj   +1 more source

Ionospheric Effects in GNSS-Reflectometry From Space [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016
Global navigation satellite systems-reflectometry (GNSS-R) is an emerging technique that uses navigation opportunistic signals as a multistatic radar. Most GNSS systems operate at L-band, which is affected by the ionosphere. At present, there is only a GNSS-R space-borne scatterometer on board the UK TechDemoSat-1, but in late ...
Camps, Adriano, Park, Hyuk, Foti, Giuseppe, Gommenginger, Christine   +3 more
openaire   +5 more sources

An Introduction to the HydroGNSS GNSS Reflectometry Remote Sensing Mission [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
HydroGNSS (Hydrology using Global Navigation Satellite System reflections) has been selected as the second European Space Agency (ESA) Scout earth observation mission to demonstrate the capability of small satellites to deliver science. This article summarizes the case for HydroGNSS as developed during its system consolidation study.
Martin Unwin, Nazzareno Pierdicca, Estel Cardellach, Kimmo Rautiainen, Giuseppe Foti, Paul Blunt, Leila Guerriero, Emanuele Santi, Michel Tossaint   +8 more
openaire   +5 more sources

Modified GNSS-PIR and Initial Verifications From the Perspective of Altimetry

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This article proposed a modified structure of global navigation satellite system (GNSS) pseudointerferometric reflectometry (GNSS-PIR). The combination of the direct and reflected signals at the front end was modified as the combination of their coherent
Xuebao Hong, Yunlong Zhu, Jie Li, Pengyu Yang, Dongkai Yang   +4 more
doaj   +1 more source

FY3E GNOS II GNSS Reflectometry: Mission Review and First Results

Remote Sensing, 2022
FengYun-3E (FY3E), launched on 5 July 2021, is one of China’s polar-orbiting meteorological satellite series. The GNOS II onboard FY3E is an operational GNSS remote sensor that for the first time combines GNSS radio occultation (GNSS RO) and GNSS ...
Guanglin Yang, Weihua Bai, Jinsong Wang, Xiuqing Hu, Peng Zhang, Yueqiang Sun, Na Xu, Xiaochun Zhai, Xianjun Xiao, Junming Xia, Feixiong Huang, Cong Yin, Qifei Du, Xianyi Wang, Yuerong Cai, Xiangguang Meng, Guangyuan Tan, Peng Hu, Congliang Liu   +18 more
doaj   +1 more source

Remote Sensing of Forest Biomass Using GNSS Reflectometry [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
In this study, the capability of Global Navigation Satellite System Reflectometry in evaluating forest biomass from space has been investigated by using data coming from the TechDemoSat-1 (TDS-1) mission of Surrey Satellite Technology Ltd. and from the Cyclone Satellite System (CyGNSS) mission of NASA.
Emanuele Santi, Simonetta Paloscia, Simone Pettinato, Giacomo Fontanelli, Maria Paola Clarizia, Davide Comite, Laura Dente, Leila Guerriero, Nazzareno Pierdicca, Nicolas Floury   +9 more
openaire   +6 more sources

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

A Unified Vector Electromagnetic Framework for Ionospheric Scintillation and Polarization Effects in GNSS

Radio Science, Volume 61, Issue 6, June 2026.
Abstract The ionosphere imposes coupled amplitude, phase, and polarization distortions on trans‐ionospheric Global Navigation Satellite System (GNSS) signals, reflecting the structure and dynamics of electron‐density irregularities. Classical weak‐scatter theory provides a mature framework for interpreting amplitude and phase scintillation, but these ...
T. Durgonics, S. S. Beeck
wiley   +1 more source

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