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標題: [歐洲] 驚險一間瞬球場上空兩機擦肩而過 [打印本頁]

作者: vandas 時間: 2012-5-30 04:39 AM 標題: 驚險一間瞬球場上空兩機擦肩而過

Heart-stopping moment for a gasping crowd at Wentworth as they watch two planes on 'collision course' on approach to Heathrow - But Air Traffic Control say it was perfectly safe5.39.217.765 g0 }' X8 W- O. E; d- V6 ?5 h
By Eddie Wrenn

At first, everyone was rooted to the golf.
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But then a murmur went around the crowd at Wentworth golf course, which is under Heathrow's flight path and the scene of the 2012 BMW PGA Championships, and attention turned away from the game and towards a drama unfolding in the skies above.
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Two planes were flying overhead - and they seemed to be on a fatal collision course.5.39.217.76" s% H7 r& J5 U8 M5 L( Y0 H2 K

A gasp went round the stands as the hundreds of spectators watched the larger plane catch up with the smaller one, and the observers took a collective breath as they watched the seemingly inevitable events unfold.公仔箱論壇  R( R( f2 ]& V1 I* n8 s& M; P# R5 e
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But the only victims here were the golf spectators, who by chance happened to be perfectly placed for a unique optical illusion.
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Those planes look close: As the Wentworth golf spectators look up, tension begins to mount as the 'larger' plane begins to catch up with the smaller one5.39.217.768 v, T8 D6 U6 ^1 U4 L. ^/ G$ [

As the planes came together, the crowd diverted their attention and watched nervously for catastrophe
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There were gasps from the galleries as the planes approached each other and a crash seemed imminent
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Moment of 'impact': As the crowd squeezed their collective eyes shut, the planes hit - and the illusion is brokentvb now,tvbnow,bttvb: Y' Y- H' ^; p" O7 q0 M, r
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...And the planes separate, perfectly safe all along, and the crowds realise they had been fooled by an optical illusion - and the golf can continue5 y5 m* N( o0 L
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Suddenly, the planes merged - and the penny dropped. For what the crowd was taking part in was a unique mass-optical illusion.

The planes - despite seeming to touch for the ground-based observers - were in fact thousands of feet apart, taking part in a process named as 'stacking' as they waited in line to descend into Heathrow.; H0 F1 W* d" h5 h- m4 _
The London airport is one of the world's busiest, with more than 1,300 flights arriving or leaving each day, and air traffic controllers organise the planes into the stacking procedure.
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Naturally, the 'bigger plane' is much closer to the camera, and likely to be a mile or two away from the the 'smaller' plane up above.
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A spokesman for the Air Traffic Control at Heathrow said: 'We do hear reports of these from time to time - especially in the summer when it is a perfectly clear day and there are no visual reference points, making it appear that two planes are close.公仔箱論壇3 y2 J: E8 V+ y3 m7 A7 ?. N! |5 v
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'However at all times, planes are are kept five horizontal miles apart and a least 1,000 feet vertically, and this is monitored by both pilots and radar, so even when it looks like the planes are close, there is no danger.', |' k8 t8 _, _1 F

So this can be a common enough optical illusion if you live under a flight-path.

But for a group of spectators on a sunny Saturday, it was a heart-stopping few seconds which they are sure to never forget.
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Stacking explained: Planes join a queue, always at least 1,000 feet apart vertically-wise and with a five-mile gap horizontally, when waiting for a runway$ N" b- a' T: \% P6 b
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Perfectly placed: The crowd were in prime position for the action - unfurling at both ground level and in the skies above

作者: tyktyk22000 時間: 2012-5-30 01:45 PM 標題: 上空現撞機疑雲原來是肉眼錯覺

英國希斯路機場附近一個高爾夫球場，上周六舉行比賽期間，觀眾抬頭看到天空上兩架飛機相距甚近，眼看快要撞機，紛紛報警，但原來全是肉眼上的錯覺。tvb now,tvbnow,bttvb$ v; U9 _9 e0 ^6 s5 D) |5 [+ |
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希斯路機場控制中心發言人解釋，所有飛機在飛行時，均會保持5哩橫向、和至少1000呎垂直距離，但從地面看上去，卻會有「快要撞機」的錯覺。5.39.217.76* ?2 V5 E, t* J

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