Browsing by Keywords "Ionospheric measurement"
Now showing items 1-20 of 20
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3D electron density estimation in the ionosphere
(IEEE, 2014)Ionosphere has ion distribution which is variable in space and time. There have been physical and empirical studies for modeling the ionosphere. International Reference Ionosphere extended to Plasmasphere (IRI-Plas) is the ... -
Algorithms and basis functions in tomographic reconstruction of ionospheric electron density
(IEEE, 2005)Computerized ionospheric tomography (CIT) is a method to investigate ionosphere electron density in two or three dimensions. This method provides a flexible tool for studying ionosphere. Earth based receivers record signals ... -
Classification of regional ionospheric disturbance based on machine learning techniques
(European Space Agency, 2016)In this study, Total Electron Content (TEC) estimated from GPS receivers is used to model the regional and local variability that differs from global activity along with solar and geomagnetic indices. For the automated ... -
Determining F2 layer parameters via optimization using IRI model and IONOLAB TEC estimations
(IEEE, 2011)We know that F2 layer of the ionosphere is most important layer in the progaration of high frequency (HF) waves. In this study, The relation of the height (HmF2) and the critical frequency (FoF2) of F2 layer-among the ... -
Estimation of 3D electron density in the Ionosphere by using fusion of GPS satellite-receiver network measurements and IRI-Plas model
(IEEE, 2013)GPS systems can give a good approximation of the Slant Total Electron Content in a cylindrical path between the GPS satellite and the receiver. International Reference Ionosphere extended to Plasmasphere (IRI-Plas) model ... -
GPS/TEC estimation with IONOLAB method
(IEEE, 2007)Total Electron Content (TEC) is a key variable to measure the ionospheric characteristics and disturbances. The Global Positioning System (GPS) can be used for TEC estimation making use of the recorded signals at the GPS ... -
Investigation of hourly and daily patterns for lithosphere-ionosphere coupling before strong earthquakes
(IEEE, 2009-06)The ionosphere can be characterized with its electron density distribution which is a complex function of spatial and temporal variations, geomagnetic, solar and seismic activity. An important measurable quantity about the ... -
Investigation of litosphere-ionosphere coupling using total electron content
(IEEE, 2009)In this study, the relation between Total Electron Content (TEC) estimates obtained from GPS and the earthquakes is examined. Five earthquakes between 2003-2008 occured in Japan with different properties and China earthquake ... -
Investigation of total electron content variability due to seismic and geomagnetic disturbances in the ionosphere
(Wiley-Blackwell Publishing, 2010-10-20)Variations in solar, geomagnetic, and seismic activity can cause deviations in the ionospheric plasma that can be detected as disturbances in both natural and man-made signals. Total electron content (TEC) is an efficient ... -
Ionolab grubunun iyonküre uzaktan algılama ve 2-b görüntüleme çalışmaları
(IEEE, 2014-04)Bu çalışmada, IONOLAB grubunun son 10 yıldır iyonküre uzaktan algılaması ve 2-B görüntüleme çalışmaları özetlenecektir. TÜBİTAK EEEAG 105E171 ve 109E055 projelerinde, çift frekanslı Yerküresel Konumlama Sistemi (YKS) ... -
İyonküre elektron içeriği kullanılarak deprem öncül tespit sinyali oluşturulması
(IEEE, 2014-04)Sismik olayların iyonküredeki elektron dağılımını etkilediği ve bu etkinin bir kaynağının sismik hareketlilik öncesi kayaçların sıkışması sonucu kayaç yüzeylerinde oluşan elektrik alanın yol açtığı iyonlaşma olduğu yakın ... -
KD haberleşme için iyonkürenin plazma frekansı -yükseklik profilinin matematiksel modellenmesi
(IEEE, 2014-04)İyonkürenin plazma frekansı - yükseklik profili özellikle gökdalgası ile yapılan KD haberleşmesini önemli derecede etkilemektedir. Bu çalışmada, belirli bir coğrafik bölge üzerinden bulunan bu profilin, en küçük kareler ... -
Observed Ionospheric Effects of 23 October 2011 Van, Turkey Earthquake
(Taylor and Francis, 2012-01-17)On 23 October 2011, a very strong earthquake with a magnitude of Mw = 7.2 shook Eastern Anatolia, and tremors were felt up to 500 km from the epicentre. In this study, we present an early analysis of ionospheric disturbance ... -
Optimization of F2 layer parameters using IRI-Plas and IONOLAB-TEC
(IEEE, 2011)In this study, the relation of the maximum ionization height (HmF2) and the critical frequency (FoF2) of F2 layer is examined within their parametric range through the International Reference Ionosphere extended towards ... -
Optimization of F2 layer parameters using IRI-Plas model and IONOLAB Total Electron Content
(IEEE, 2011)In this study, the relation of the maximum ionization height (HmF2) and the critical frequency (FoF2) of F2 layer is examined within their parametric range through the International Reference Ionosphere extended towards ... -
Regional model-based computerized ionospheric tomography using GPS measurements: IONOLAB-CIT
(Wiley-Blackwell Publishing, Inc., 2015)Three-dimensional imaging of the electron density distribution in the ionosphere is a crucial task for investigating the ionospheric effects. Dual-frequency Global Positioning System (GPS) satellite signals can be used to ... -
Space weather activities of IONOLAB group using TNPGN GPS Network
(IEEE, 2011)Characterization and constant monitoring of variability of the ionosphere is of utmost importance for the performance improvement of HF communication, Satellite communication, navigation and guidance systems, Low Earth ... -
Spatio-temporal interpolation of total electron content using a GPS network
(IEEE, 2013)Constant monitoring and prediction of Space Weather events require investigation of the variability of total electron content (TEC), which is an observable feature of ionosphere using dual-frequency GPS receivers. Due to ... -
A study of lithosphere-ionosphere coupling using TUSAGA active TEC estimates
(IEEE, 2010)In this study, the disturbances in the ionosphere due to the seismic activity are investigated by using Total Electron Content estimates obtained from TUSAGA Active GPS stations in Turkey. Two earthquakes with same geophysical ... -
Synthetic TEC mapping with ordinary and universal kriging
(IEEE, 2007-06)Spatiotemporal variations in the ionosphere affects the HF and satellite communications and navigation systems. Total Electron Content (TEC) is an important parameter since it can be used to analyze the spatial and temporal ...
