Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Feza Arikan"'
Autor:
Sinem Deniz Yenen, Feza Arikan
Publikováno v:
Atmosphere, Vol 15, Iss 6, p 675 (2024)
In this study, a 4-D, computerized ionospheric tomography algorithm, IONOLAB-Fusion, is developed to reconstruct electron density using both actual and virtual vertical and horizontal paths for all ionospheric states. The user-friendly algorithm only
Externí odkaz:
https://doaj.org/article/74edd39a59f540cd8320a44f7af83bf6
Publikováno v:
Geodesy and Geodynamics, Vol 10, Iss 1, Pp 72-76 (2019)
Modeling Near Vertical Incidence Sounding (NVIS) High Frequency (HF) signal propagation in the ionosphere is important. Because, ionosondes which are special types of radars probing the ionosphere with certain HF frequencies (between 2 and 30 MHz), w
Externí odkaz:
https://doaj.org/article/26e50e414f734b659cff457e9df0d317
Publikováno v:
Geodesy and Geodynamics, Vol 9, Iss 6, Pp 425-431 (2018)
Ionosphere is the layer of atmosphere which plays an important role both in space based navigation, positioning and communication systems and HF signals. The structure of the electron density is a function of spatio-temporal variables. The electrodyn
Externí odkaz:
https://doaj.org/article/eb19fddb0e874097b36bc0965db89be4
Publikováno v:
Geodesy and Geodynamics, Vol 9, Iss 5, Pp 347-357 (2018)
Ionosphere is the most challenging part of Space Weather with its spatio-temporal variability and dispersive nature. Ionospheric models are very important in reducing positioning error in GNSS system. International Reference Ionosphere (IRI) is an em
Externí odkaz:
https://doaj.org/article/2d4ac831b4e24d4f8459dba26b506d79
Autor:
Tamara Gulyaeva, Feza Arikan
Publikováno v:
Geomatics, Natural Hazards & Risk, Vol 8, Iss 2, Pp 509-524 (2017)
The retrospective statistical analysis of total electron content (TEC) is carried out using global ionospheric maps (GIM) for 1999–2015. TEC anomalies are analysed for 2670 earthquakes (EQ) from M6.0 to M10.0 classified into 2205 ‘non-storm’ EQ
Externí odkaz:
https://doaj.org/article/f4ebaa8071624075b9d8073fcab2f9d1
Autor:
Feza Arikan, Aysenur Yarici
Publikováno v:
Geodesy and Geodynamics, Vol 8, Iss 5, Pp 297-304 (2017)
Ionosphere is an important layer of atmosphere which is under constant forcing from both below due to gravitational, geomagnetic and seismic activities, and above due to solar wind and galactic radiation. Spatio-temporal variability of ionosphere is
Externí odkaz:
https://doaj.org/article/a76d39d354e249f1b0f4ce67c904e2cb
Publikováno v:
Geodesy and Geodynamics, Vol 7, Iss 1, Pp 1-10 (2016)
Total Electron Content (TEC) is an important observable parameter of the ionosphere which forms the main source of error for space based navigation and positioning systems. Since the deployment of Global Navigation Satellite Systems (GNSS), cost-effe
Externí odkaz:
https://doaj.org/article/8f91477e5cf54629b16284f9288862a3
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing
Ionogram scaling is the process of reconstructing electron density with respect to height by using the measurements of a remote sensing instrument known as ionosonde. In this study, a novel two-stage ionogram scaling technique, ionogram scaling and e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7df080811417c25a7aae5c7776bc2f15
https://hdl.handle.net/11693/111309
https://hdl.handle.net/11693/111309
Publikováno v:
SIU
Ionosphere has several effects on radio signals. Traveling wave-like ionospheric disturbances can occur due to solar radiations, seismic activities. Receiver loss of locks and some positioning errors can occur because of these disturbances. The time
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4e6f9acb33572db428d4de1c0c6cb9a
https://doi.org/10.1109/siu49456.2020.9302278
https://doi.org/10.1109/siu49456.2020.9302278
Autor:
Feza Arikan, Solen Kumbay Yildiz
Publikováno v:
SIU
A locally planar Total Electron Content (TEC) trend model for the midlatitude region encompassing a major part of Turkey and some Balkan countries is investigated by estimating its coefficients for the year 2011. The TEC values are obtained from Glob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12ee52c23dd1a361e07b85bbef068575
https://doi.org/10.1109/siu49456.2020.9302237
https://doi.org/10.1109/siu49456.2020.9302237