Gravitationai, Tide in the Atmosphere of Titan

T h e p r e s e n c e o f a t i d e i n T i t a n ' s a t m o s p h e r e a s a . " r r ' i t o f t h e S a t u r n i a n g r a v i t a t i o n a l f i e l d i s s u g g e s t e d . S i n c e T i t a n j s b e l i e v e d t o r o t a t e s y i i h r o n o u s i y o r n e a r s y n c h r o n o u s l y , t h i s t i d e w i l l b ; v i r t u a l l y s t a t i o n a r y r r i t h r e s p e c t t o T i t a n r s sur face and may be a c l ass i c exampl e o f an i e o u i l i b r i u m t i d ; ' . T i t a n a t m o s p h e r e m o d e l s t o d a t e are based on measurernents made near po i n ts o r t h o g o n a l t o t h e s u b S a t u r n p o i n t . C o n s j d e r a t i o n o f t h e p l s s i b l e t i d a l e f f e c t s s u g g e s t s t ' h a t s u r f a c e pressure near the sub and an t i -Saturnward po in ts may be about 1% greater Lhan a t where these measurements w e r e m a d e . ' b t h e r a t m o s p h e r i c t i d e s o n T i t a n a n d p r o s p e c t s f o r e x p e r i m e n t a l o b s e r v a t j o n o f t h e t i d e a r e b r i e f l y c o n s i d e r e d . K e y w o r d s : T i t a n , A t m o s p h e r e , t i d e s , g r a v i t a t i o n