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D e s i g n  a n d  I m p l e me n t a t i o n  o f  t h e  T r a c k i n g  T e r mi n a l  I n t e g r a t i n g
             GP S  wi t h  GS M  P o s i t i o n i n g  T e c h n o l o g y
  J I A NG  X i r u i ,  C HE N G  Z h e n l i n ,  F AN G  J i n y u n ,  Z HA NG  L i v n g
( I n s t i t u t e  o f  C o m p u t e  T e c h n o l o g y ,  C h i n e s e  A c a d e m y  o f  S c i e n c e s ,  B e i j i n g  1 0 0 0 8 0 )
b s t r a c t ]  Th e  t r a c k i n g  t e r mi n a l  p l a y s  a n  i mp o r a n t  rl e  i n  t h e  n a v i g a t i o n  a n d  p o s i t i o n i n g  s y s t e m.  Ho w  t o
  t h e  t r a c k i n g  t e r mi n a l  i s  a  k e y  p rb l e m  t o  t h e  d e s i g n e r  a n d  u s e r .  T h i s  p a p e r  p r e s e n t s  a  me t h o d  wh i c h
i mpr v e  t
i n t e g r a t e s
p e r f o r m a n c e  a n d  p r e c i s i o
GP S  wi 比GS M  p o s i t i o n i n g
h n o l o g y  i n  o n e  t e r mi n a l ,  a n d  s p e c i f i e s  t h e  s o f