Since 1965, when is equipment became operational, a( u5 i# n3 W2 \1 M) }3 m
device called Eros has been helped to make sky traffic__1__5 @. u! U7 h8 n2 ]- ^* w
safe. Eros is short for Eliminate Range Zero System?
8 g+ N! P! ?) y& ~& x, E8 Y" t range zero meaning collision. Basically Eros is a computer! H0 [1 l/ ~, G1 w; l/ C% L* }
system measures, with great speed and precision, closing__2__
6 c+ Y0 o; \ U& ^9 \) q k$ W$ s speed ( the speed at which two objects are approaching
% f0 o, G! R/ {+ x3 g1 q$ P* g each other ) and range ( the distance apart of the objects ).
+ {) C% Q: }0 W5 P. c Eros can warn aircraft approachable each other at jet__3__
7 q- \) @0 }2 H) S* }8 Q" n speeds and can provide protection for as many as a thousand
$ F2 O. \% i+ P) F" J5 Y4 u aircraft in wide area. The pilot of an Eros?equipped aircraft$ j/ E& f3 d) h
heading for a collision hear a warning noise in his ear?phones__4_! S/ d- ~' `1 [# `
when his airborne computer calculates that he is within thirty
: c/ X( @% U D0 S& m7 a seconds or half a mile ( whichever occurs first ) of other aircraft.__5__
+ E6 b) L( c; R5 h1 O6 P; K At the same time, a flashing red arrow on the device's indicator7 Z. j# z3 O+ i0 Y) ~1 B! J
panel instructs him to climb. Simultaneously, in the other aircraft, __6__
% n' n) {) G6 o the signal is automatically reversed: the flashing arrow tells the$ l: ?/ S( A2 z8 F; P. {$ ?
pilot to climb. The newer Eros II system can accommodate a total) w5 s* H( e j& A
of two thousands aircraft at one time within a 140?mile radius__7__
& p1 s" p' y4 n) y$ H, H Every three seconds, each Eros?equipped plane automatically
5 {; ^% a. g4 _ reports to ground stations and to similarly equipped aircraft% i3 n& A) }( V1 [/ s6 _, n9 g& a" y
their precise range, altitude and approach rate. The producers__8__
! y7 H- B9 r# `, z+ w9 T of Eros, the McDonnell Dougals Corporation in the U.S., are
7 I+ k8 Y1 F5 R* e1 ^ now studying the fitting of Eros and will do more to make__9__
7 T0 Z0 ]* q! b& Q6 e the sky safer: they shall also lighten the work of air?traffic__10__- j5 ~5 s5 Z' F
controllers and increase the efficiency of airports. |
发表于 2012-8-14 11:29:10
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