Results 121 to 130 of about 7,274 (218)

Celestial Navigation: A State-of-the-Art Review Towards a Light Autonomous Underwater Vehicle (LAUV) Conceptual Application. [PDF]

Sensors (Basel)
Lampreia S, Policarpo H, Almeida PP, Roboredo NR, Ruivo JM, Henriques RB, Lobo V.   +6 more
europepmc   +1 more source

On the Origin of Summer Sporadic E Periodicities at Midlatitudes

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Summertime midlatitude sporadic E (Es) layers exhibit daily periodicities whose underlying physical causes remain to be fully identified. We investigate the origin of these periodicities by analyzing an 11‐year data set (2007–2017) comprising ionosonde measurements, FORMOSAT‐3/COSMIC radio occultation (RO) observations, and WACCM‐X neutral ...
Xu Yan, Hongtao Cai, Yusong Qin, Chao Xiong, Jiawei Zhou, Hongwen Xu, Lubing Yang   +6 more
wiley   +1 more source

Abrupt transition to irreversible damage in the overdrafted Sacramento Valley aquifer system. [PDF]

Proc Natl Acad Sci U S A
Larochelle S, Chanard K, Dalaison M, Fortin J, Jolivet R, Longuevergne L, Fleitout L, Argus DF, Gauer LM, Avouac JP.   +9 more
europepmc   +1 more source

Data verification for GNSS systems and protection of GNSS services

Globala system för satellitnavigering (eng. global navigation satellite systems, GNSS) tillhandahåller allestädes närvarande precis platsbestämning och synkronisering för ett brett spann av tillämpningar, från platsbaserade tjänster till industriella kärnfunktioner i kommunikation och stora infrastrukturer.
openaire   +1 more source

Validation of Global Ionospheric Specification (GIS) Electron Density Measurements During Solar Minimum to Solar Maximum Under Quiet and Disturbed Geomagnetic Conditions

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Global Ionospheric Specification (GIS) three‐dimensional electron density profiles constructed by assimilating the line‐of‐sight total electron content (TEC) from global navigation satellite system (GNSS) radio occultation (RO) measurements by FORMOSAT‐7/COSMIC‐2 (F7/C2) and ground‐based receiver network from international GNSS service ...
P. K. Rajesh, C. H. Charles Lin, C. Y. Lin, T. Matsuo, H. Jin, S. Perwitasari, M. Nishioka, Chao‐Yen Chen   +7 more
wiley   +1 more source

Estimation of Klobuchar Coefficients for Japan and Performance Evaluation Compared with QZSS Coefficients. [PDF]

Sensors (Basel)
Sim EJ, Park KD.
europepmc   +1 more source

Interferometric Synthetic Aperture Radar (InSAR) for Monitoring Seasonal Snow

Water Resources Research, Volume 62, Issue 9, September 2026.
Abstract Interferometric Synthetic Aperture Radar (InSAR) offers a potential pathway for measuring seasonal snow water equivalent (SWE) and snow depth at spatial and temporal scales needed for basin‐scale hydrology. First proposed for seasonal snow more than 25 years ago, InSAR uses repeat‐pass radar phase differences to estimate changes in SWE or ...
Jack Tarricone, Ross T. Palomaki, Randall Bonnell, Zachary Hoppinen, Shadi Oveisgharan, Jorge Jorge Ruiz, Hans‐Peter Marshall, Elias J. Deeb, Carrie Vuyovich, Steven A. Margulis, Simon Yueh, Richard R. Forster, Ryan W. Webb, Daniel McGrath, Juha Lemmetyinen, Kelly Elder, Rashmi Shah, Xiaolan Xu   +17 more
wiley   +1 more source

Dataset of integrated seismic and geodetic strain rates in the Kopeh Dagh Belt (NE Iran): Earthquake focal mechanisms (1969-2024) and GNSS-derived deformation parameters. [PDF]

Data Brief
Rashidi A, Shafieibafti S, Nemati M, Derakhshani R.   +3 more
europepmc   +1 more source

Biases and Uncertainties in Radiosonde‐Based Precipitable Water Vapor

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Precipitable water vapor (PWV) plays an important role in weather and climate phenomena. Accurate PWV measurements based on radiosonde observations are essential for assessing remote‐sensing measurements and long‐term trends. This study examines the performance of PWV algorithms, including their intrinsic biases and their sensitivity to ...
António P. Ferreira, Cesar Azorin‐Molina, Luis Gimeno   +2 more
wiley   +1 more source

Near Real-Time Calving Detection in Grazing Cows Using GNSS-Derived Behavioral Anomalies. [PDF]

Animals (Basel)
García García MJ, Padrón Tejera E, Torralbo Muñoz MDP, Pérez Marín DC, Trotter MG, Chang AZ, Macor J, Maroto Molina F.   +7 more
europepmc   +1 more source