UDK 551.510.535
APPLICATION OF SATELLITE SYSTEMS GLONASS/GPS AT ADAPTATION IONOSPHERIC MODEL
А. А. Vasenina*, К. А. Sidorenko
JSC “Omskiy Nauchno Issledovatelskiy Institut Priborostroeniya” 231, Maslennikova Str., Omsk, 644009, Russian Federation *E-mail: vas.al.an@rambler.ru
The paper discusses different methods of continuous monitoring of the state of the ionospheric plasma. It is shown that, despite the merits of the approach used, the current shortcomings limit their practical application. The analysis of the various options prediction of ionospheric parameters is conducted. It is possible to substantiate the choice of a model that meets the requirements of simplicity and high speed calculations necessary for further research. An example of the construction of electron density profile using the selected experimental model NeQuick is given. Reasonability of using as adapting the model parameters values of the solar radio emission at a wavelength of 10.7 cm, which characterizes the level of solar activity is shown. The way of evaluation index using data from global navigation satellite systems GLONASS/GPS is given. It includes smoothing the measurements for each satellite, the formation of correlation matrices of data and minimizing the functional defined by the deviation from the true values of the model. The effectiveness of the methods of continuous monitoring of the state of the ionospheric plasma was evaluated by carrying out experimental work on the range of "ONIIP" Omsk. On the basis of the obtained data the main advantages of the proposed method are shown. In determining the critical frequency of the F2 layer at points distant from the scope of the satellites in the distance of 700 to 1300 km: the best description of the nature of the parameter depending on the time and, consequently, improving the accuracy of determination is given.
satellite radio-sounding of the ionosphere, total electron content (TEC), NeQuick ionospheric model
References
  1. Kunitsyn V. E., Tereshchenko E. D., Andreeva E. S. Radiotomografiya ionosfery [Ionospheric tomography]. Moscow, Fizmatlit Publ., 2007, 336 p. (In Russ.).

  2. Avdyushin S. I. Radiozondirovanie ionosfery sputnikovymi i nazemnymi ionozondami [Radiosounding ionospheric satellite and ground ionosonde]. Moscow, IPG im. akademika E. K. Fedorova Publ., 2008, 210 p. (In Russ.).

  3. Brunini C., Azpilicueta F., Gende M., Camilion E., Aragon-Angel M., Hernandez-Pajares M., Juan M., Sanz J., Salazar D. Ground- and space-based GPS data ingestion into the NeQuick model. Journal of Geodesy, 2011,
    vol. 85 (12), p. 931–939.

  4. Bilitza D. International Reference Ionosphere 2000. Radio Science, 2001, vol. 36, no 2, p. 261–275.

  5. Bilitza D. International reference ionosphere 2000: examples of improvements and new features. Advances in Space Research, 2003, vol. 31, no 3, p. 757–767.

  6. Memarzadeh Y. Ionospheric modeling for precise GNSS applications. PhD thesis, Delft University of Technology, 2009, 208 p.

  7. Radicella S. M. The NeQuick model genesis, uses and evolution. Annals of Geophysics, 2009, vol. 52,
    no. 3/4, p. 417–422.

  8. Radicella S. M. Ionospheric models for GNSS single frequency range delay corrections. Fisica de la Tierra, 2008, vol. 20, p. 27–39.

  9. Andreeva E. S. [Analysis of ionospheric parameters by radio occultation, ionozondovym measurements and data models IRI, NeQuick]. Elektromagnitnye volny i elektronnye sistemy, 2010,
    vol. 15, no 8, p. 44–52 (In Russ.).

  10. Coisson P. Comparisons of experimental topside electron concentration profiles with IRI and NeQuickmodels. Annals of Geophysics, 2002, vol. 45,
    no 1, p. 111–116.

  11. Vasenina A. A. [Methods of correction of solar activity indices]. Tekhnika radio svyazi. Omskiy NII priborostroeniya, 2013, vol. 2(20), p. 27–34 (In Russ.).

  12. Berezovskiy V. A., Vasenina A. A., Benzik A. V. [Influence the accuracy of determination of the critical frequency of the F2 layer on the behavior of ray trajectories]. Omskiy nauchnyy vestnik, 2012, no. 3 (113), p. 294–298 (In Russ.).

  13. Bryunelli B. E., Namgladze A. A. Fizika ionosfery. [The physics of the ionosphere]. Moscow, Nauka Publ., 1988, 528 p. (In Russ.).

  14. Blinov I. V. [Solar activity]. Sorosovskiy obrazovatel'nyy zhurnal, 2004, vol. 8, no 2, p. 64–68 (In Russ.).

  15. Zhang Y., Wu F., Kubo N., Yasuda A. TEC Measurement By Single Dual-frequency GPS Receiver. Proceedings of the 2003 international Symposium on GPS/GNSS, November 2003. Available at: http://tsgps. denshi.e.kaiyodai.ac.jp/kubo/TEC.pdf (accessed 02.11.2014).

  16. ITU-R Reference Ionospheric Characteristics. Recommendation ITU-R P. 1239, 2010, 30 p.


Vasenina Alena Andreevna – research scientist, deputy head of the research laboratory, JSC “Omskiy Nauchno Issledovatelskiy Institut Priborostroeniya”. E-mail: vas.al.an@rambler.ru

Sidorenko Klim Andreevich – Cand. Sc., head of the research laboratory, JSC “Omskiy Nauchno Issledovatelskiy Institut Priborostroeniya”. E-mail: sidorenko.klim@yandex.ru