References

Afraimovich, E. L., and, et al. (2004), Mid-latitude amplitude flickering of GPS signals and failures in GPS functioning at the boundary of the auroral oval, Radiophysics (in Russian), 47, 509.

Basler, R. P., G. H. Price, R. T. Tsunoda, and T. L. Wong (1988), Ionospheric distortion of HF signals, Radio Sci., 23, (4), 569.

Blagoveshchensky, D. V., and T. D. Borisova (2000), Substorm effects of ionosphere and propagation, Radio Sci., 35, (5), 1165.

Blagoveshchensky, D. V., and G. A. Zherebtsov (1987), High-Latitude Geophysical Phenomena and Forecasting of HF Channels (in Russian), 272 pp., Nauka, Moscow.

Bristow, W. A., R. A. Greenwald, and J. C. Samson (1994), Identification of high-latitude acoustic gravity wave sources using the Goose Bay HF radar, J. Geophys. Res., 79, 319.

Brunelli, B. E., and A. A. Namgaladze (1988), Physics of the Ionosphere (in Russian), 527 pp., Nauka, Moscow.

Cherkashin, Yu. N., I. B. Egorov, V. P. Uryadov, and A. A. Ponyatov (2003), Experimental study of the variations in maximum usable frequency at oblique sounding paths, Radiophysics (in Russian), 46, (12), 1011.

Deminov, M. G., A. T. Karpachev, S. K. Annakuliev, V. V. Afonin, and Ya. Smilauerb (1996), Dynamics of the ionization troughs in the night-time subauroral F -region during geomagnetic storms, Adv. Space Res., 17, (10), 141.

Erukhimov, L. M., and A. T. Karpachev, et al. (1998), Modeling of propagation of short radio waves in the vicinity of quasi-critical rays in the disturbed ionosphere, Radiophysics (in Russian), 41, (1), 3.

Fejer, B. G., and M. C. Kelley (1980), Ionospheric irregularities, Rev. Geophys., 18, (2), 401.

Goodman, J. M., and G. Aarons (1990), Influence of ionospheric effects on modern electronic systems, Proc. IEEE, 78, (3), 59.

Greenwald, R. A., and G. Aarons, et al. (1995), DARN/SuperDARN: A global view of high-latitude convection, Space Sci. Rev., 71, 761.

Hocke, K., and K. Schlegel (1996), A review of atmospheric gravity waves and traveling ionospheric disturbances: 1982-1995, Ann. Geophys., 14, 917.

Hunsucker, R. D. (1982), Atmospheric gravity waves generated in the high-latitude ionosphere: a review, Rev. Geophys., 20, 293.

Hunsucker, R. D., and H. F. Bates (1969), Survey of polar and auroral region effects on HF propagation, Radio Sci., 4, (4), 347.

Ivanov, V. A., V. I. Kurkin, V. E. Nosov, V. P. Uryadov, and V. V. Shumaev (2003), LFM ionosonde and its application in ionospheric studies, Radiophysics (in Russian), 46, (11), 919.

Karpachev, A. T. (2003), Dependence of the main ionospheric trough on longitude, height, season, local time, and solar and magnetic activity, Geomagn. Aeron. (in Russian), 43, (2), 256.

Karpachev, A. T., and V. V. Afonin (2004), Variations in the high-latitude ionosphere structure during the storm on 22-23 March 1979 according to the data of the Cosmos 900 and Intercosmos 19 satellites, Geomagn. Aeron. (in Russian), 44, (1), 67.

Karpachev, A. T., M. G. Deminov, and V. V. Afonin (1996), Model of the mid-latitude ionospheric trough on the base of Cosmos 900 and Intercosmos 19 satellites data, Adv. Space Res., 18, (6), 221.

Kurkin, V. I., S. N. Ponomarchuk, V. I. Ponomarchuk, and S. N. Smirnov (2004), Influence of the main ionospheric trough on the characteristics of SW signals at oblique sounding paths, Sol. Terr. Phys. (in Russian), 5, 124.

Lockwood, M. (1981), A simple model of the effects of the mid-latitude total ion trough in the bottomside F  layer on the HF radiowave propagation, Radio Sci., 16, (3), 385.

MacDougall, J. W., and S. N. Ponomarchuk, et al. (2001), Traveling ionospheric disturbance properties deduced from Super Dual Auroral Radar measurements, Ann. Geophys., 18, 1550.

Panasyuk, M. I., and S. N. Ponomarchuk, et al. (2004), Magnetic storms in October 2003: Collaboration "Solar Extreme Events in 2003 (SEE-2003), Space Res. (in Russian), 42, (5), 509.

Ponyatov, A. A., and V. P. Uryadov (1996), Computer modeling of the ionospheric propagation of short radio waves, Preprint 428 (in Russian), 20 pp., Radiophys. Res. Inst., Nizhny Novgorod, Russia.

Potekhin, A. P., O. I. Berngardt, V. I. Kurkin, G. A. Zherebtsov, and B. G. Shpynev (1999), Observation of abnormally powerful scattering with ISTP IS radar, Proc. SPIE, 3983, 328.

Rodger, A. S., R. J. Moffett, and S. Quegan (1992), The role of ion drift in the formation of ionization troughs in the mid- and high-latitude ionosphere: A review, J. Atmos. Terr. Phys., 54, (1), 1.

Siddle, D. R., A. J. Stocker, and E. M. Warrington (2004), Time of flight and direction of arrival of HF radio signals received over a path along the mid-latitude trough: Observations, Radio Sci., 39, RS4008, doi:10.1029/2004RS003049.

Stocker, A. J., E. M. Warrington, and T. B. Jones (2003), A comparison of observed and modeled deviations from the great circle direction for a 4490 km HF propagation path along the mid-latitude ionospheric trough, Radio Sci., 38, (3), 1045, doi:10.1029/2002RS002781.

Tsunoda, R. T. (1988), High-latitude F region irregularities: A review and synthesis, Rev. Geophys., 26, (4), 719.

Uryadov, V. P., and A. A. Ponyatov (2001), Influence of the ionospheric trough on the characteristics of HF signals, paper presented at LVI Scientific Session dedicated to the Day of Radio (in Russian), Radiotechnics, Moscow.

Uryadov, V. P., V. I. Kurkin, V. E. Nosov, S. V. Rosanov, and I. N. Poddel'sky (2002), Monitoring of the ionosphere in the Asian longitudinal sector on the basis of the Russian network of the LFM ionosondes, Sol. Terr. Phys. (in Russian), 2, 251.

Vertogradov, G. G., Yu. P. Myatezhnikov, V. P. Uryadov, and S. V. Rozanov (2004), Coordinated experimental evaluation of the characteristics of HF signal propagation at mid-latitude paths of different length and orientation, Radiophysics (in Russian), 47, (10), 15.

Vo, H. B., and J. C. Foster (2001), A quantitative study of ionospheric density gradients at mid-latitudes, J. Geophys. Res., 106, 21,555.

Williams, P. J. S., and J. C. Foster, et al. (1988), The generation and propagation of atmospheric gravity waves observed during the Worldwide Atmospheric Gravity-wave Study (WAGS), J. Atmos. Terr. Phys., 50, (4/5), 323.

Yeoman, T. K., and H. Luhr (1997), CUTLASS/IMAGE observations of high-latitude convection features during substorms, Ann. Geophys., 15, 692.

Yokoyama, N., Y. Kamide, and H. Miyaoka (1998), The size of the auroral belt during magnetic storms, Ann. Geophys., 16, (5), 566.

Zaalov, N. Y., E. M. Warrington, and A. J. Stoker (2003), The simulation of off-great circle HF propagation effects due to presence of patches and arc of enhanced electron density within the polar cap ionosphere, Radio Sci., 38, (3), 1052, 1045, doi:10.1029/2002RS002798.

Zherebtsov, G. A., and E. M. Warrington, et al. (1997), Manifestation of ionospheric disturbances in the north-eastern region of Russia, Stud. Geomagn. Aeron. Sol. Phys. (in Russian), 107, 10.

Zhulina, E. M. (1978), High-latitude ionosphere and its impact on radio wave propagation, in: Trajectory Characteristics of Short Waves (in Russian), p. 68, IZMIRAN, Moscow.