Report on the U.S. Program for the International Geophysical Year July 1, 1957 - December 31, 1958 (1965) / Chapter Skim
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Pages 258-318
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V I IONOSPHERIC PHYSICS PROGRAM The Model C-4 Ionospheric Recorder used during the IGY
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IONOSPHERIC PHYSICS PROGRAM Page A Organization of Technical Panel on Ionospheric Physics 255 B
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IONOSPHERIC PHYSICS Tenth August 17, 1957 Boulder, Colorado Eleventh November 6, 1957 Boulder, Colorado Tw e l f t h A p r i l 8, 1958 Washington, D
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IONOSPHERIC PHYSICS to the soundness of the program. The Panel was also assigned the task of coordinating the execution of the program.
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IONOSPHERIC PHYSICS f . Other experiments.
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IONOSPHERIC PHYSICS incidence soundings a t the s t a t i o n to be established on T-3 (Fletcher's Ice I s l a n d )
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IONOSPHERIC PHYSICS f a c t , t h i s question was not d e a l t w i t h by the Panel.
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IONOSPHERIC PHYSICS Project 6.1 - Ionosphere Sounder Procurement 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.2 - South American Sounding Program 1. Objectives.
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U> PUEBTPIWO 1200-75-W 10 SEPT -57 IXOan S « L E JX HOSrKWTM.
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IONOSPHERIC PHYSICS Bibliography.
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IONOSPHERIC PHYSICS Project 6.3 - A n t a r c t i c Sounder Program 1. Objectives.
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IONOSPHERIC PHYSICS b. Published Papers.
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IONOSPHERIC PHYSICS Project 6.5 - Data Qu a l i t y Control and Training 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.6 - Equatori a l VHF Forward Scatter 1. Objectives.
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IONOSPHERIC PHYSICS e l e c t r o j e t current above Huancayo, the occurrence on Huancayo lonograms of e q u a t o r i a l Sporadic E, and the i n t e n s i t y of VHF signals propagated by the ionosphere over Huancayo. The zone i n which E-region e f f e c t s of the e q u a t o r i a l current-stream are apparent extends over some 10° of l a t i t u d e .
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IONOSPHERIC PHYSICS R Cohen, K
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IONOSPHERIC PHYSICS Project 6.7 - Radio Noise Measurement 1. Objectives.
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IONOSPHERIC PHYSICS quencies tend t o occur near sunset instead of a few hours a f t e r sunrise as a t most stat i o n s . As a r e s u l t , the 160-kc afternoon noise levels appear to be 20 to 30 db lower than predicted a t t h i s l o c a t i o n .
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IONOSPHERIC PHYSICS Project 6.8 - Ionospheric Absorption-Pulse Method 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.9 - True Height Determination 1. Objectives.
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IONOSPHERIC PHYSICS made as to p r o f i l e shape other than a monotonic v a r i a t i o n of e l e c t r o n density w i t h height. A t t e n t i o n i s drawn to several scaling p r a c t i c e s .
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IONOSPHERIC PHYSICS S Chandra, J
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IONOSPHERIC PHYSICS Project 6.10 - Whistler Program - West 1. Objectives.
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IONOSPHERIC PHYSICS Kc 8 S T 9 F E B 1 9 5 9 0 9 3 6 - 2 8 U T A , Kc 8 S T 9 F E B 1 9 5 9 0 9 3 6 ' 3 7 U T B E B4 C, OlOsec Figure 3. Short and Long Whistlers Kc mi.
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IONOSPHERIC PHYSICS ( i i i ) I o n o s p h e r i c Noise - a l l n a t u r a l l y o c c u r r i n g e l e c t r o m a g n e t i c n o i s e o r i g i n a t i n g i n the atmosphere e x c e p t a t m o s p h e r i c s , w h i s t l e r s , and w h i s t l e r i n t e r a c t i o n s .
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IONOSPHERIC PHYSICS P r o j e c t 6.11 - W h i s t l e r Program - East 1, O b j e c t i v e s . T h i s p r o j e c t , c a r r i e d o u t a t the Thayer School o f E n g i n e e r i n g , D a r t mouth C o l l e g e , p r o v i d e d f o r the r e c o r d i n g o f w h i s t l e r s and r e l a t e d phenomena a t many l o c a t i o n s a p p r o x i m a t e l y a l o n g t h e l o n g i t u d e band W 65°-75° i n a s i m i l a r f a s h i o n as f o r p r o j e c t 6.10.
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IONOSPHERIC PHYSICS and t h e s t a t i o n o p e r a t e d t h r o u g h o u t t h e IGY, g, Hanover, New Hampshire. Equipment had been i n o p e r a t i o n f o r some tim e a t the c o u n t r y r e s i d e n c e o f M
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IONOSPHERIC PHYSICS v e r y n e a r l y a l l t o be " s h o r t . " There i s a pronounced seasonal v a r i a t i o n i n a c t i v i t y w i t h a l a r g e maximum m J u l y and August and a s m a l l e r maximum i n January and F e b r u a r y .
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IONOSPHERIC PHYSICS te r m " l o n o s p h e r i c s " f o r t h e s e , as c o n t r a s t e d w i t h " t r o p o s p h e r i c s " ( l i g h t n i n g )
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IONOSPHERIC PHYSICS P r o j e c t 6.12 - F i x e d Frequency B a c k s c a t t e r Measurements 1.
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IONOSPHERIC PHYSICS f . P ullman, Washington (53.5°N)
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IONOSPHERIC PHYSICS The s i z e o f the i r r e g u l a r i t i e s r e q u i r e d t o produce the observed echoes has been est i m a t e d by assuming a Gaussian c r o s s s e c t i o n f o r the i r r e g u l a r i t y . I n the r e l a t i v e l y r e s t r i c t e d f r e q u e n c y range used, the e f f e c t i v e t r a n s v e r s e c o r r e l a t i o n - d i s t a n c e must be on the o r d e r o f one meter and the l o n g i t u d i n a l c o r r e l a t i o n - d i s t a n c e g r e a t e r t h a n t h i r t y m e t e r s .
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IONOSPHERIC PHYSICS a l i g n e d i o n i z a t i o n . I n order to m a i n t a i n these p e r t u r b a t i o n s , to e x p l a i n r a d i o - s t a r s c i n t i l l a t i o n as w e l l as Eg and spread-F, Martyn only r e q u i r e d that t h e i r r a d i u s be much l e s s than the s c a l e height of the r e g i o n .
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IONOSPHERIC PHYSICS P r o j e c t 6.14 - O b l i q u e I n c i d e n c e Sporadic-E (Eg) Measurements 1.
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IONOSPHERIC PHYSICS Figure 10 i s the d i u r n a l chart of monthly median s i g n a l and noise le v e l s f o r October 1957 from Onna^ Okinawa and Guantanamo Bay^ Cuba. The noise le v e l s appear to be s l i g h t l y out of phase but t h i s i s not a r e a l e f f e c t .
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ro vo 2 0 19 18 17 16 15 14 13 12 I I 10 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 01 (a)
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IONOSPHERIC PHYSICS G U A N T A N A M O B A T S I O U L L E V E L S NOISE L E V E L S I I I • I I I I . I , 0 0 « 0 4 Oa 10 12 ( 4 16 18 2 0 2 4 0 0 L O U L T g t f Figure 10.
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IONOSPHERIC PHYSICS Project 6.19 - A r c t i c D r i f t i n g S t a t i o n Sounder 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.21 - Ionospheric Absorption, Cosmic Noise Method 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.22 - Radio Amateur Reports on Unusual Propagation 1. Objectives.
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IONOSPHERIC PHYSICS the whole United States i n the summer months. The minimum was found between 03 and 06 o'clock w i t h a value around 1% of the time i n siiramer.
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IONOSPHERIC PHYSICS Past references to t r a n s e q u a t o r i a l propagation have mentioned maxima at the equinoxes and minima at the s o l s t i c e s . I n the present data, however, i t appears th a t the s i t u a t i o n i s not q u i t e so simple.
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IONOSPHERIC PHYSICS or normal t o the magnetic equator. The l a t e r mode p a r t i c u l a r l y tends to show a s o l s t i t i a l preference, the b e t t e r s o l s t i c e being the one when i t i s summer along the magnet i c equator.
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IONOSPHERIC PHYSICS Project 6.23 - Radio Star S c i n t i l l a t i o n 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.24 - Ionospheric Data Processing and P u b l i c a t i o n 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.26 - Signal Corps Ionospheric Sounder Stations 1. Objectives.
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IONOSPHERIC PHYSICS Project 6.27 - Whistler Stations - Alaska 1. Objectives.
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IONOSPHERIC PHYSICS CLO I 10 I -- Lr-rU 150 ' WMT Figure 12. Diurnal V a r i a t i o n of Whistler Occurrence at College, Alaska, Data from December 1955-March 1958.
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IONOSPHERIC PHYSICS 6. Bibliography.
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IONOSPHERIC PHYSICS Project 6.28 - Fixed Frequency Backscatter - Alaska 1. Objectives.
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