TY - GEN
T1 - Analysis of seasonal ionospheric gradients over Turkey for year 2011
AU - Koroglu, Meltem
AU - Koroglu, Ozan
AU - Arikan, Feza
N1 - Publisher Copyright:
© 2017 URSI.
PY - 2017/11/10
Y1 - 2017/11/10
N2 - Ground Based Augmentation Systems (GBAS) monitor the ionosphere locally for giving measurement integrity information to nearby users. Monitoring systems use ionospheric threat models to calculate the integrity information and contain ionospheric gradients estimated from the ionospheric slant delays through the maximum gradient observed days. These models show only maximum gradient estimates according to the elevation angles of the satellites. In this study, ionospheric gradients are analyzed seasonally in order to give input information to the threat modeling process over Turkey. In the analysis process, developed method also shows the effects of the geomagnetic storms and earthquakes on the ionospheric gradients. As a result, for the first time, by using the developed tool, a detailed seasonal threat modeling is obtained over Turkey for year 2011. According to the analysis results, maximum gradient observed as 20 mm/km and variability of the gradients are highly dependent on to geomagnetic storms and earthquakes over Turkey in 2011. The seasons with more earthquakes and geomagnetic storms have more high gradients.
AB - Ground Based Augmentation Systems (GBAS) monitor the ionosphere locally for giving measurement integrity information to nearby users. Monitoring systems use ionospheric threat models to calculate the integrity information and contain ionospheric gradients estimated from the ionospheric slant delays through the maximum gradient observed days. These models show only maximum gradient estimates according to the elevation angles of the satellites. In this study, ionospheric gradients are analyzed seasonally in order to give input information to the threat modeling process over Turkey. In the analysis process, developed method also shows the effects of the geomagnetic storms and earthquakes on the ionospheric gradients. As a result, for the first time, by using the developed tool, a detailed seasonal threat modeling is obtained over Turkey for year 2011. According to the analysis results, maximum gradient observed as 20 mm/km and variability of the gradients are highly dependent on to geomagnetic storms and earthquakes over Turkey in 2011. The seasons with more earthquakes and geomagnetic storms have more high gradients.
UR - https://www.scopus.com/pages/publications/85046131427
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=performanshacettepe&SrcAuth=WosAPI&KeyUT=WOS:000463723600355&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.23919/URSIGASS.2017.8105305
DO - 10.23919/URSIGASS.2017.8105305
M3 - Conference contribution
AN - SCOPUS:85046131427
T3 - 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
SP - 1
EP - 4
BT - 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
Y2 - 19 August 2017 through 26 August 2017
ER -