characteristics of the short wave propagation
TRANSCRIPT
'27
CHARACTERISTICS OF THE SHORT WAVE PROPAGATION
FROM TOKYO TO SYOWA STATION, ANTARCTICA
Sadao HASEGAWA*, Tetsuo TAKEUCHI*"' and Takesh1 ISOBE:t-H
Abstract
Measurements of the field intensity of
6055 KHz (NSB, Nippon Short Wave Broad
casting), 9595 KHz (NSB) and 15300 KH7
(NHK, Rad10 Japan) were made at Syowa
Stat10n m Antarctica, from Apnl 1966 to
January 1967.
Re•mlts were compared with the calcu
lated values by the t\',O method� developed
by K. M1vA and CRPL (Central Rad10
P10pagat10n Laboratory), and with the ana-
liLed result by l\1rvA's method on the whole
It was found that the propagat10n of the
1 ec1eved rad10 \v ave wa 5 always controlled
by MUF (Maximum Usable Frequency) of
the ionosphere at Syo\-va Stat10n, and that
the propagat10n wa5 also made by the E5
(Sporadic E) mode at near midmght m wmte1
there
Also, v. e found that the pr opagat10n of
9595 KHz had the best condit1011 of all the
frequenoe� measured th1 ough all season�.
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(1959-60:fj::-) (!),f��R=ff::_ WAKAI G (196l) ;c_ J: ot::l(ij�(!)fl'j:1/:\'JV=-:tu(rf 0 JJY O){�IJ�iJ�� 0
� Nt{i:HJT:Jt;BT�O-Ji#I) Rad10 Research Laboratones, Kogane1, Tokyo
*' 1 1'lt<l!l7ilf'JePJrf;kBH1ttt!lli5l/JllJBr Akita Rad10 vVave Obserrnt01 y, Tegata-Sum1yosh1-cho, Akita
*'**;Jii1U:bJT5't;fflffl!t;I[Bf Racho Re�eat ch Labo1 atone\, Hu a1�0 Branch, Isozak1, Nakammato.
0)4-c, /SUJ,\'<:_ r-t�if_/ /J)�nJ:tf�iftlJ c L--C, �.l)i_t (1961) l EBZ�lll (1963) 0)1!liJ'.xEfi1i*lJ��
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No. 33 1968]
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No. 33. 1968'] 11
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3. 3. 15300 KHz (I) ffili'lvft1i
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10 J=:I UJt vi �mitt --e , -t h-i\ti JJIJ 0) �m}t /if vc .J: "::) -c fit£ V) t.:..
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No. 33. 1968] 33
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DAVIES, K ( 1965) Ionosphenc radio propagation. Natn. Bur. Stand. Monogr , SO.
w�� JJ1 . ::kfiJlIE�C1961) *ttfJfLl:.fm{JliJ vc 1 0 trr11s t�ttW���O)Jill/4ff£¥Jtt 'rll&HiJT�m*tR. 7C3o) , 288-292.
T11JB37§- · i&JJl=:95(1959) 'ltllfl{�t:;I, �{)JL.
'tr f.j;-( 1952) tli<E[Jlif�@itvc&,,�t.c'�ll:ilff-)i A.,4'j 11:0)&f�';e 1=!::i::k:�<l!ZIDi<ltiJJWfvT�tfiu, a. BJ ;;/:JUl-!fJ • :EJ l l�J'U5( 1963) *ttffd..J:.vc�vt 0 1tJl!-g]jU:¥t{JllJ5£Ka* T4I:fi�*4. 17, 51-55 WAKAI, N. and S. WATANABE(196 1 ) Ionosphenc absorption of HF waves m high latitudes. J.
Radio Res. Labs. Japan, 8(40), 4 1 3-423 (1968�10 JI 1 8 13 '.7t:lill)