Since 1965, when is equipment became operational, a) z# {( K' O' i% k2 _# ^5 a3 Z
device called Eros has been helped to make sky traffic__1__
) o% T! h2 R& f+ `7 I4 d+ \8 Z safe. Eros is short for Eliminate Range Zero System?
' F, e- y7 `; l4 l( V range zero meaning collision. Basically Eros is a computer$ C q8 O% J: Y2 T/ C4 N
system measures, with great speed and precision, closing__2__9 }+ b! F( Q- W7 Y1 I* V! K" g
speed ( the speed at which two objects are approaching3 ~5 ~1 ]+ a- I9 b0 \$ F' c$ ~
each other ) and range ( the distance apart of the objects ).
, \* a, ^9 n9 _) B7 u Eros can warn aircraft approachable each other at jet__3__4 ?1 `3 I N# A1 d
speeds and can provide protection for as many as a thousand
% K1 [' `+ r- l; d$ [' ^ aircraft in wide area. The pilot of an Eros?equipped aircraft
2 I1 h c4 R' Z heading for a collision hear a warning noise in his ear?phones__4_, ` G5 F6 p; F5 |/ a
when his airborne computer calculates that he is within thirty
# U; n) M9 ^5 o seconds or half a mile ( whichever occurs first ) of other aircraft.__5__
6 W+ k3 M+ K% V At the same time, a flashing red arrow on the device's indicator
2 | ?9 \6 g; a9 {" V5 b panel instructs him to climb. Simultaneously, in the other aircraft, __6__
/ ^$ ~3 L0 j1 \) a the signal is automatically reversed: the flashing arrow tells the
1 Y6 K( h3 r6 `% ], i8 n/ L pilot to climb. The newer Eros II system can accommodate a total' V7 \" S5 N. N# U1 G. V) W1 x
of two thousands aircraft at one time within a 140?mile radius__7__
# Z. J% W& Z: R) e, T Every three seconds, each Eros?equipped plane automatically: x9 X9 k5 e' a9 o; h; U; t
reports to ground stations and to similarly equipped aircraft
& l- y$ s, r- k6 y their precise range, altitude and approach rate. The producers__8__5 a* s+ n# s. }% t4 H
of Eros, the McDonnell Dougals Corporation in the U.S., are
- r. {7 q9 o* |6 Z now studying the fitting of Eros and will do more to make__9__
# A5 L# ^7 j& u$ e9 ], z/ j the sky safer: they shall also lighten the work of air?traffic__10__
, V! n$ ~6 n0 I( a controllers and increase the efficiency of airports. |
发表于 2012-8-14 11:29:10
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