Download Aircraft Navigation (transl. from Russian) [NASA TT F-524] by S. Fedchin PDF

By S. Fedchin

NASA Technical Translation. Translation of «Самолетовождение», Москва, 1966.

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Extra info for Aircraft Navigation (transl. from Russian) [NASA TT F-524]

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Azimuthal P r o j e c t i o n s : ( a ) Normal; ( c ) Oblique. D 1 1 (b) T r a n s v e r s e ; A s i s e v i d e n t from F i g . 1 . 2 6 , on s u c h p r o j e c t i o n s p o i n t s M and N on t h e E a r t h ' s s u r f a c e w i l l b e p r o ­ j e c t e d a t a d i f f e r e n t d i s t a n c e from t h e point of tangency of t h e plane o f t h e f i g u r e w i t h t h e E a r t h ' s sur­ face. Meridians i n azimuthal ( p o l a r ) p r o j e c t i o n s a r e r e p r e s e n t e d by s t r a i g h t l i n e s which converge t o a p o l e a t an a n g l e e q u a l t o t h e d i f ­ ference i n longitude: 6 = AA.

The p r o p e r t i e s o f t h e p r o j e c t i o n s w i l l d e p e n d on t h e p r o p e r t i e s of t h e s e f u n c t i o n s (F1, F2, F 3 , and F 4 ) , which must be c o n t i n u o u s a n d w e l l - d e f i n e d , s i n c e t h e map i s made w i t h o u t d i s c o n t i n u i t i e s s o t h a t a s i n g l e p o i n t o n t h e map c o r r e s p o n d s t o e v e r y p o i n t i n t h e location. Map S c a l e s The map-making a) globe. b) p r o c e s s i s d i v i d e d i n t o two s t a g e s .

36 km (see Fig. 24, b ) . T h e r e f o r e , it i s p o s s i b l e t o s p l i c e o n l y o n e s t r i p or o n e c o l u m n o f t h e s e m a p s . T h e o r t h o d r o m e w i t h a l e n g t h u p t o 1 2 0 0 km o n , m a p s w i t h a and 1:2,000,000 ( w i t h i n t h e l i m i t s o f one s h e e t ) a p p e a r s i n p r a c t i c e as a s t r a i g h t l i n e , w h i l e t h e loxodrome i s t h e arc of a logarithmic s p i r a l . U s u a l l y , i n d i r e c t i o n s which i n t e r s e c t t h e m e r i d i a n s , t h e l o x o d r o m e s e c t i o n s w i t h a l e n g t h up t o 6 0 0 km a r e l i k e w i s e c o n s t r u c t e d i n t h e f o r m o f a s t r a i g h t l i n e , w h i l e t h e f l i g h t a n g l e i s measured i n t h e middle o f a p a r t o f a r o u t e i n o r d e r t o l e s s e n by a f a c t o r o f 2 t h e e r r o r o f t h e measured a n g l e d u r i n g f l i g h t w i t h t h e u s e o f a magnetic compass.

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