Results 31 to 40 of about 1,130 (254)

Improved models for estimating sporadic-E intensity from GNSS radio occultation measurements

Frontiers in Astronomy and Space Sciences, 2023
Several models for estimating sporadic-E intensity from Global Navigation Satellite System (GNSS) radio occultation (RO) observation have previously been developed using a single perturbation or intensity parameter, such as phase-based total electron ...
Daniel J. Emmons, Dong L. Wu, Nimalan Swarnalingam, Nimalan Swarnalingam, Ashar F. Ali, Joseph A. Ellis, Kyle E. Fitch, Kenneth S. Obenberger   +7 more
doaj   +1 more source

Detecting Targets above the Earth's Surface Using GNSS-R Delay Doppler Maps: Results from TDS-1 [PDF]

, 2019
: Global Navigation Satellite System (GNSS) reflected signals can be used to remotely sense the Earth’s surface, known as GNSS reflectometry (GNSS-R). The GNSS-R technique has been applied to numerous areas, such as the retrieval of wind speed, and the
Benson, Craig, Camps Carmona, Adriano José, Hu, Changjiang, Hyuk, Park, Qiao, Li, Rizos, Chris   +5 more
core   +2 more sources

Analyzing GNSS-RO Derived Ionospheric Intensity Scintillation Preceding Earthquakes in the Coral Sea During 2022

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The work of B.-E. Boudriki-Semlali was supported by an FI Grant: 2021 FI_B 00471 from FIAGAUR 2021. This work was supported in part by project “GENESIS: GNSS Environmental and Societal Missions- Subproject UPC” under Grant PID2021-126436OB-C21 sponsored by the Ministerio de Ciencia e Investigación (MCIN)/Agencia Estatal de Investigación(AEI)/10.13039 ...
Mireia Carvajal Librado, Carlos Molina, Badr-Eddine Boudriki Semlali, Hyuk Park, Adriano Camps   +4 more
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The 2021 volcanic eruption in La Palma Island and its impact on ionospheric scintillation as measured from GNSS reference stations, GNSS-R, and GNSS-RO [PDF]

, 2022
Ionospheric disturbances induced by seismic activity have been studied in the last years by many authors, showing an impact both before and after the occurrence of earthquakes.
Boudriki Semlali, Badr-Eddine, Camps, Adriano, Molina, Carlos, Park, Hyuk   +3 more
core   +2 more sources

Applications of GNSS-RO to Numerical Weather Prediction and Tropical Cyclone Forecast [PDF]

Atmosphere, 2020
The global navigation satellite system (GNSS) radio occultation (RO) technique is an atmospheric sounding technique that originated in the 1990s. The data provided by this approach are playing a consistently significant role in atmospheric research and related applications.
Weihua Bai, Nan Deng, Yueqiang Sun, Qifei Du, Junming Xia, Xianyi Wang, Xiangguang Meng, Danyang Zhao, Congliang Liu, Guangyuan Tan, Ziyan Liu, Xiaoxu Liu   +11 more
openaire   +2 more sources

GNSS transpolar earth reflectometry exploriNg system (G-TERN): mission concept [PDF]

, 2018
The global navigation satellite system (GNSS) Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA's Earth Explorer 9 revised call by a team of 33 multi-disciplinary scientists.
Baggen, Rens, Camps Carmona, Adriano José, Cardellach Galí, Estel, Hernández Pajares, Manuel, Wickert, Jens   +4 more
core   +2 more sources

On the Kalman Smoother Interpolation Error Distribution in Collocation Comparison of Atmospheric Profiles [PDF]

, 2023
The intercomparison between different atmospheric monitoring systems is key for instrument calibration and validation. Common cases involve satellites, radiosonde and atmospheric model outputs.
Fassò, Alessandro
core   +1 more source

Rádio Ocultação GNSS: Revisão Teórica, Missões e Produtos

Revista Brasileira de Cartografia, 2022
A rádio ocultação (RO) começou a ser utilizada para a sondagem da atmosfera de outros planetas a partir da década de 1960. Com o desenvolvimento do Global Navigation Satellite System (GNSS) e de missões com satélites de baixa órbita (Low Earth Orbit ...
Gabriel Oliveira Jerez, Daniele Barroca Marra Alves, Raphael Silva Nespolo, João Francisco Galera Monico, Manuel Hernández-Pajares   +4 more
doaj   +1 more source

GNSS radio occultation soundings from commercial off-the-shelf receivers on board balloon platforms [PDF]

Atmospheric Measurement Techniques, 2023
The Global Navigation Satellite System (GNSS) radio occultation (RO) technique has proven to be an effective tool for Earth atmosphere profiling. Traditional spaceborne RO satellite constellations are expensive with relatively low sampling density for ...
K. J. Nelson, K. J. Nelson, F. Xie, B. C. Chan, A. Goel, J. Kosh, T. G. R. Reid, C. R. Snyder, P. M. Tarantino   +8 more
doaj   +1 more source

GNSS-RO residual ionospheric error (RIE): a new method and assessment

Atmospheric Measurement Techniques
Abstract. GNSS radio occultation (RO) observations play an increasingly important role in monitoring climate changes and numerical weather forecasts in the upper troposphere and stratosphere. The magnitudes of the RO bending angle are small at these altitudes, and therefore residual ionospheric error (RIE) is critical to retrieve vertical profiles of ...
Dong L. Wu, V. A. Yudin, Kyu‐Myong Kim, Mohar Chattopadhyay, Lawrence Coy, R. S. Lieberman, Cornelius Csar Jude H. Salinas, Jae N. Lee, Jie Gong, Guiping Liu   +9 more
openalex   +5 more sources