Physics of auroral phenomena : proceedings of the 39th annual seminar, Apatity, 29 February-4 March, 2016 / [ed. board: N. V. Semenova, A. G. Yahnin]. - Апатиты : Издательство Кольского научного центра РАН, 2016. - 167 с. : ил., табл.

V. С. Roldugin et al. case with small auroral activity. The altitude profiles of the reflected ordinary wave amplitude from 00:30 UT till 03:00 UT are shown in Fig. 4. It is seen that from 01:30 UT at the radar data appear reflections from heights of 120-140 km which are obviously connected with auroral activity, however both to and after this moment there are reflections from heights of the mesopause of 80-90 km. Temporary variations of the reflections have periodic character with the characteristic time of 15-20 minutes, similar to changes of intensity of luminescence according to the all-sky camera data. The luminescence is generally caused by forbidden OI emission of oxygen at 557.7 nanometers which is extinguished lower the height of the mesopause because of collisions of the excited atoms with neutrals. The interesting feature of this case is good correlation of changes of luminescence intensity with reflections at the height of 47.5 km where the luminescence is obviously impossible, and spreading of AGW takes place. The considered comparison is presented in Fig. 5: the signal of the radar is shown by dotted line in the logarithmic scale, the luminescence is shown by solid line. After 03:00 UT luminescence variations are a little late concerning the radar signal that most likely is connected with change of speed and a form of a wave. Time, UT 3. Conclusion g From comparison of data of the radar of partial reflections with optical pj observations of waves it is possible с to assume that wavy changes in a too B structure of luminescence intensity are connected with passing of gravity waves. The joint analysis of data will allow to interpret more fully data of reflected ordinary and extraordinary к waves amplitudes, and also to clear physics of luminescence of the 10 ionosphere when passing waves. Figure 5. Behavior of luminosity intensity of the night sky above the northern part of the sky over Lovozero (solid line) and the reflected ordinary wave amplitude over Tumanny from the height of 47.5 km (dotted line). References Armstrong E.B. (1982) The association of visible airglow features with a gravity wave, J. Atmos. Terr. Phys., V. 44, 325-336. Chemouss S., Yahnin A., Roldugin A. (2002) Optical observations of the acoustic-gravity waves (AGW) supposedly initiated by rocket launches. “Physics of Auroral Phenomena”, Proc. XXV Annual Seminar, Apatity, 95-99. Chimonas G„ Hines C.O. (1970) Atmospheric gravity waves launched by auroral currents, Planet. Space Sci., V. 18,565-582. Francis S.H. (1974) A theory of medium-scale traveling ionospheric disturbances, J. Geophys. Res., V. 79, 5245-5260. Francis S.H. (1975) Global propagation of atmospheric gravity waves: A review, J. Atmos. Terr. Phys., V. 37, 1011-1054. Hines C.O. Internal gravity waves at atmospheric heights (1960), Can. J. Phys., V. 38, 1441-1481. Hunsucker R.D. (1977) Estimate of the relative importance of Joule heating and the Lorentz force in generating atmospheric gravity waves from the auroral electrojet, J. Geophys. Res., V. 82, № 29, 4826-4828. doi: 10.1029/JA082i029p04826. Hunsucker R.D. (1982) Atmospheric gravity waves generated in the high-latitude ionosphere: A review, Rev. Geophys., V. 20, № 2, 293-315, doi: 10.1029/RG020i002p00293. Taylor M.J., Bishop M.B., Taylor V. (1995a) All-sky measurements of short period waves imaged in the 01(557.7 nm), Na(589.2 nm) and near infrared OH and 02(0.1) nightglow emissions during the ALOHA-93 campaign, Geophys. Res. Letters, V. 22, № 20, 2833-2836. Taylor M.J., Frits D.C., Isler J.R. (1995b) Determination of horizontal and vertical structure of an anusual pattern of short period gravity waves imaged during ALOHA-93, Geophys. Res. Letters, v. 22, № 20, 2837-2840. Tereshchenko V.D., Vasilyev E.B., Ovchinnikov N. A., Popov A.A. (2003) The medium wave radar of the Polar Geophysical Institute for research of the lower ionosphere, Techniques and methods of geophysical experiment, Apatity: KSC RAS, 37-46. (in Russian) Wilson C. R. (1969a) Auroral infrasound waves, J. Geophys. Res., V. 7, 1812-1836. Wilson C.R. (1969b) Infrasonic waves from moving auroral electrojets, Planet. Space Sci., V. 17, 1107-1120. Wilson C.R. (1969c) Two station infrasonic wave observation, Planet. Space Sci., V. 17,1817-1847. 103