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the g e om a g n e t ic o p tic s w ith the a c c o u n t o f the therm a l m o v e ment o f e le c t r o n s is d is c u s s e d . T h e e q u a tio n o f the s ix th p o w e r , d e s c r ib in g the o b liq u e d is tribu tion o f th r e e t y p e s o f n o r mal w a v e s : the o rd in a r y , u n o rd in a r y and p la sm a o n e s , is o b t a i ned. P ig . — 2, re f. — 6. R o le o f a u ro ra l e le c t r o n and p ro ton p r e c ip ita tio n in the fo rm a tion o f s p a tia l s tru c tu re o f the w in te r p o la r P —r e g io n . K r i v i l e v V.N., M in g a le v V .S ., M in g a le v a G .I. — In: P r o p a g a tio n o f r a d io w a v e s in the a u ro ra l io n o s p h e r e . A p a tity , 1992, p. 23 -29 . T h e r e s u lts o f a n um e rica l s tu d y o f s p a tia l s tru c tu re o f the p o la r P —r e g io n o b ta in e d b y the c o n v e c t in g p o la r io n o s p h e r e num e rica l m odel tak in g a c c o u n t the p la sm a tem p e ra tu re r e g im e and a u ro ra l p a r tic le p r e c ip ita tio n a r e p r e s e n te d . C a lc u la t io n s a r e made fo r w in te r and lo w s o la r and e n h a n c e d g e om a g n e t ic a c t iv it y c o n d ition s . T h e r e s u lt s h a v e b e e n o b ta in e d fo r two p a r tic le p r e c ip ita tio n z o n e co n figu ra tip n s : two d is tin c t z o n e —lik e r e g io n s and on e annu la r r e g io n . It h a s b e e n found that precip ita> tion g s o ft a u r o r a l e le c t r o n and p ro ton flu x e s c a n p r o d u c e c o n s id e r a b le e ffe c t on the s p a tia l s tru c tu re fo rm a tion o f the w in te r p o la r io n o s p h e r e und e r low s o la r a c tiv ity c o n d itio n s : th is e f f e c t is to in c e r e a s e w h en the l e v e l o f g e om a g n e t ic a c t iv it y r is e s . U n lin e a r F a r l e y —Bun em an ( P B ) w a v e s in the au ro ra l e le c t r o je t . Z a r n it s k y Y u .P . — In: P r o p a g a t io n o f r a d io w a v e s in the a u ro ra l io n o s p h e r e . A p a tity , 1992 , p. 29-45 . E ffe c t s o f the cu b ic u n lin e a r lity o f P a r l e y —Bun em an tu rbu le n c e a r e u s e d fo r c o n s tru c tin g o f the u n lin e a r d i s p e r s iv e e q u a tion. It w a s found du rin g the a n a ly s is o f the eq u a tion u n d e r the h y d ro d y n am ic a l a p p r o a c h that the p h a s e v e l o c i t y o f p r im a ry w a v e s r e d u c e d s tron g ly . It is sh ow n that the s ta b iliz a t io n o f P a r l e y —Bunem an p rim a ry w a v e s is c a u s e d b y s e v e r a l m ech an ism s . T h e main on e is the u n lin e a r fr e q u e n c y d is p la c em e n t, n e s t o n e is the e le c t r o n h e a tin g and, p r o b a b ly , the u su a l t h r e e—w a v e d d is in te g ra tion . P ig . — 3. L in e a r tran s fo rm a tion o f norm a l w a v e s in the a n is o t r o p ic mu ltid im ension ir r e g u la r medium (p l a s m a ). E rem in a I.V., Y a s h in Y u .Y a . — In: P r o p a g a t io n o f r a d io w a v e s in the a u r o r a l io n o s p h e r e . A p a tity , 1992, p. 46 -50 . T h e tran s fo rm a tion o f norm a l w a v e s in the ir r e g u la r a n i s o tr o p ic medium un d e r the p r e s e n c e and a b s e n c e o f the p o l a - r iz a t io n a l d e g e n e r a c y is a n a ly s e d . T h e p r o b lem is c o n s id e r e d a s the d im en s ion a l on e at the e x p e n s e o f the in trodu c tion o f the tota l v a r ia b le ( o f t ime ) f o r two w a v e s . R e f. - 9. On v a r ia t io n s o f the fr e q u e n c y o f r a d io s ig n a ls at the h igh la titu d e r a d io w a v e pa th s. K a lit e n k o v N.V. - In: P r o p a g a tio n o f r a d io w a v e s in the a u r o r a l io n o s p h e r e . A p a tity , 1992 , p. 50 -53 . 126
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