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  3. Volume 80, 2014
  4. Research of azimuth-temporal variations of the ionosphere from GNSS-stations network

Research of azimuth-temporal variations of the ionosphere from GNSS-stations network

ISTCGCAP.
2014;
Volume 80, Number 80
: pp. 40-47
Received: December 01, 2014
Authors:
  1. L. Yankiv-Vitkovska
  2. A. V. Zademleniuk
1
Lviv Polytechnic National University
2
Lviv Polytechnic National University

Purpose. It is necessary to examine the azimuth-temporal variations of the ionosphere during active disturbance, according to observations SULP-station and to analyze the data. The technique. As input data we selected ionofiles with regular GNSS observations of the reference station SULP-on date 1, 2, 3 September and 1, 2, 3 October 2013 at 0, 6, 12, 18 and 23 h The next step was to our choice of satellite data. This information formed in the daily Files Software Trimble Planning. The frequency of such registered user specifies the personal file. In this case, registration of data took place periodicity of of 10 minutes. Based on the selected minimum, maximum and average values of vertical electron content in the ionosphere (VTEC), we calculated the slanted electron content in the ionosphere (STEC) in September and October 2013. Represented map of the azimuthal-temporal variations in the ionosphere were made using Surfer. Results. Based on 6 daily series associated with disturbances on Sun study was conducted the azimuthal-time variations of the ionosphere on GNSS-observations referentsnoyi station SULP for period 1, 2, 3 September 2013 and 1, 2, 3 October 2013. After analyzing the value of STEC we saw that a calm ionosphere is observed in September, which is caused solar flares October 2, 2013. The most calm ionosphere was fixed at 23 o'clock. every day, maximum ionospheric disturbances on daily data is at 12 o'clock. Scientific novelty consists in the study the azimuthal-temporal variations of the ionosphere during active disturbance with the help improved methods for determining the parameters of the ionosphere using observations at the SULP-station. which is a part of ZAKPOS/UA-EUPOS network. Practical significance. If we examine the azimuthal-temporal variations of the ionosphere for one station, we can perform spatial-temporal distribution of the ionosphere for the territory of Ukraine using data from GNSS-stations.

GNSS-observation
active network of reference stations ZAKPOS / UA-EUPOS
TEC
VTEC
STEC
  1. Antonovych K.M. Ispol’zovanye sputnykovich radyonavyhacyonnych system v heodezyy: V 2 t. [The use of satellite navigation systems in geodesy]. Moskov, 2005, 334 p.
  2. International ionospheric model IRI [Virtual resource]  – Available at:https://cosparhq.cnes.fr/
  3. Zaharov I.G., Ljashenko M.V. Sravnenie  jeksperi mental'nyh i model'nyh znachenij polnogo jelektronnogo soderzhanija v ionosfere nad Vostochnoj Evropoj [Comparison of the experimental and modeling values of the total electron content in the ionospheric over Eastern Europe]. Radiofizika i radioastronomija [Radio and radio astronomy. 2003, T. 8, 3, рр. 280–286.
  4. Ratovskij K.G., Potehin A.P., Medvedev A.V., Kurkin V.I. Sovremennyj  cifrovoj  ionozond DPS-4 i ego vozmozhnosti [The modern digital ionosond DPS-4 and its possibilities ]. Solnechno-zemnaja fizika [Solar-terrestrial physics]. Novosibirsk, Izd-vo SO RAN, 2004, issue 5 (118), рр.102–104.
  5. Chernohor L.F.,Domnyn Y.F., Emel’yanov L. Ya., Kotov D. V., Lyashenko M. V.  Issledovanye ionosfernych processov nad Ukraynoj [The research of ionospheric processes over Ukraine]  Space research in Ukraine (2010–2012). Kyiv, рр. 33–43.
  6. Yankiv-Vitkovska L. M. Vykorystannya dvochastotnyx GNSS sposterezhen dlya vyznachennya parametriv ionosfery [The use of dual-frequency GNSS observations to determine the parameters of the ionosphere]. Geodesy, Cartography and Aerial Photography, No 76, 2012, Lviv, рр. 19–29.
  7. Yankiv-Vitkovska L. M. Metodyka vyznachennya parametriv ionosfery u merezhi suputnykovyx stancij Zaxidnoyi Ukrayiny[Method of determining the parameters of the ionosphere in the satellite stations in Western Ukraine]. Space science and technology. Kyiv, 2013, vol. 19, No 6, рр. 47–52.
  8. Klobuchar J., Ionospheric time-delay algorithm for single-frequency GPS users. IEEE Transactions on Aerospace and Electronics System, 1987, AES 23(3), рр. 325–331.
  9. Memarzahed Y. Ionospheric modeling for precise GNSS applications, PhD thesis, 2009,242 p.
  10. Zakpos –networkofreferenceGPSstations [Virtual resource] –Available at: http://zakpos.zakgeo.com.ua.
  11. http://www.spaceweather.com/archive.php?view=1&day=10&month=02&year=2013