Kaliningrad, Russia
Kaliningrad, Russia

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Cherniak Iu.V.,Av. Pobeda | Zakharenkova I.E.,Av. Pobeda | Shagimuratov I.I.,Av. Pobeda | Krankowski A.,GRL UWM
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011 | Year: 2011

The COSMIC/FORMOSAT-3 occultation mission providing essential information about height electron density distribution in ionosphere. It is important to verify occultation profiles with other techniques and to obtain experience in the reliability of their derivation. For comparison we used the measurements provided by DIAS ionosonde network and midlatitude Kharkov incoherent scatter radar. The comparison indicates that usually COSMIC RO profiles are in a good agreement with ionosonde in F2 layer peak electron density and with IS radars profiles both in the F2 layer peak electron density and the shape of profiles. © 2011 IEEE.


Cherniak Iu.V.,Av. Pobeda | Krankowski A.,GRL UWM | Zakharenkova I.E.,Av. Pobeda | Yakimova G.A.,Av. Pobeda
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011 | Year: 2011

The ionosphere modification at mid-latitudes caused by the solar eclipse on January 4, 2011 is consider. The observations of ionosphere were carried out with digital ionosonde "Parus" and dual frequency GPS/GLONASS receiver. In order to analyze the spatial and temporal changes of the ionosphere over Europe the GNSS network data was used. The eclipse was observed from 7.17 till 10.05 UT. The maximal phase of eclipse was registered at 8.39 UT with the coefficient of Solar disk covering of 76.94%. The eclipse over observation point took place at aftersunrise hours. The negative effect in foF2 values and TEC distribution was clearly observed. The foF2 decrease up to 1.6 times was registered with delay of about 10 min relative to the maximum eclipse phase. The observation results are presented. © 2011 IEEE.


Cherniak Iu.V.,Av. Pobeda | Zakharenkova I.E.,Av. Pobeda | Shagimuratov I.I.,Av. Pobeda | Krankowski A.,GRL UWM | And 2 more authors.
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011 | Year: 2011

At the boundary of the 23rd and 24th solar cycles the geomagnetic disturbances occurred on October 11, 2008, July 22, 2009, May 2 and 29, 2010 caused the most appreciable ionosphere reaction. The peculiarities of spatial-temporal ionospheric response over the Europe are investigated. The results of multi-instrumental radiophysical observations were used for analysis. Each of considered geomagnetic disturbances with the similar magnitude caused the ionospheric response with different duration, amplitude, sign, and spatial character. It was observed positive, two-phase and negative ionospheric storms. The mechanisms of positive ionospheric storms caused by the moderate geomagnetic disturbances were considered. © 2011 IEEE.


Shagimuratov I.I.,Av. Pobeda | Cherniak I.V.,Av. Pobeda | Zakharenkova I.E.,Av. Pobeda | Tepenitsyna N.Y.,Av. Pobeda | Yakimova G.A.,Av. Pobeda
2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014 | Year: 2014

The main aspects of a methodology developed and used at the Western Department IZMIRAN for determining the total electron content (TEC) of the ionosphere from GPS observations and the principles of using two frequency measurements of satellite signal delays in navigation systems are presented. The methodology for obtaining of TEC maps of the ionosphere is based of an algorithm for multistation processing of GPS observations. Using a set of algorithms and programs, regional TEC maps with a spatial resolution of 1° and a time resolution of 15 min-1 hr are regularly drawn. This precision allows using TEC maps for studying the structure and dynamics of the ionosphere during different geophysical events. The results of studies of the response of the ionosphere to the solar eclipse on January 4, 2011 and the geomagnetic storms on January 22, 2012 are presented. © 2014 IEEE.

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