Results 31 to 40 of about 95,608 (153)
Sensors, 2020 Global navigation satellite systems (GNSS) allow estimating total electron content (TEC). However, it is still a problem to calculate absolute ionosphere parameters from GNSS data: negative TEC values could appear, and most of existing algorithms does ...
Yury Yasyukevich +2 more
doaj +1 more source
A new GNSS signal carrier tracking algorithm for ionospheric TEC monitoring
Kongjian Kexue Xuebao, 2014 Wenxue Liu +3 more
exaly +2 more sources
Terrestrial, Atmospheric and Oceanic Sciences, 2021 A total solar eclipse passed over the continental United States from the west to the east coast on 21 August 2017. Measurements made by more than 2200 groundbased GNSS (Global Navigation Satellite System) receivers observed a significant decrease in ...
Chi-Yen Lin +6 more
doaj +1 more source
Global long-term trends in the total electron content [PDF]
Annales GeophysicaeTotal electron content (TEC) is an important parameter for ionospheric dynamics, global navigation satellite system/Global Positioning System (GNSS/GPS) signal propagation and related applications of GNSS/GPS signals.
J. Urbář, J. Laštovička
doaj +1 more source
Generation of Proxy GIM‐TEC for Extreme Storms Before the Era of GNSS Observations
Journal of Geophysical Research: Space Physics, 2022 AbstractFor the first time, we reconstructed global distribution of both the total electron content disturbance W index and TEC values for eight extreme storms (Dst < −250 nT) occurred before the epoch of GNSS observations in solar cycle 22. We created a model based on superposed epoch analysis of the training set of GIM‐W maps of nine SC23 extreme ...
Tamara Gulyaeva +4 more
openaire +3 more sources
A novel quasi-open loop architecture for GNSS carrier recovery systems [PDF]
, 2012 The problem of designing robust systems to track global navigation satellite system (GNSS) signals in harsh environments has gained high attention. The classical closed loop architectures, such as phase locked loops, have been used for many years for ...
Letizia Lo Presti +5 more
core +1 more source
SWAIR project - GNSS receivers TEC
, 2023 Two GNSS receivers were installed in the Lisbon area starting from December 19, 2019 . First receiver was installed in Lisbon in the Lisbon airport area (coordinates 38°46'46"N 9°8'23"W).
Morozova, A (via Mendeley Data)
core +1 more source
Analysis of Polar Ionosphere Anomaly of Interplanetary Shock Events Based on GNSS TEC
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 Using large-scope and high-accuracy global navigation satellite system (GNSS) ionospheric monitoring, this study considered the polar ionosphere anomaly morphology caused by an interplanetary shock event that occurred on September 12, 2014. First, we used the continuous observation data of GNSS stations in the Antarctic region to estimate the carrier ...
Ran Cui +6 more
openaire +3 more sources
WTEC: A new index to estimate the intensity of ionospheric disturbances
Results in Physics, 2018 We propose a new index, WTEC, to estimate the level of ionospheric disturbances from Global Navigation Satellite Systems (GNSS) data. The index is calculated based on dual-frequency phase measurements from single GNSS receiver.
S.V. Voeykov +4 more
doaj +1 more source
Ionospheric Effects on High Gain Antenna GNSS Measurements � TEC Estimation and Correction [PDF]
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2017 The ionospheric delay of global navigation satellite systems (GNSS) signals typically is compensated by adding a single correction value to the pseudorange measurement of a GNSS receiver. Yet, this neglects the dispersive nature of the ionosphere. In this context we analyze the ionospheric signal distortion beyond a constant delay. These effects become
Thoelert, Steffen +3 more
openaire +2 more sources