Name: 【TED】託德-漢弗萊斯：如何騙過GPS（Todd Humphreys: How to fool a GPS) (【TED】Todd Humphreys: How to fool a GPS (Todd Humphreys: How to fool a GPS))
Uploaded: 2021-01-14T06:20:20.000Z
Duration: 15 min 43 s

Translator: Joseph Geni Reviewer: Morton Bast

Something happened in the early morning hours

of May 2nd, 2000, that had a profound effect

諷刺的是, 當時幾乎沒有人察覺

Ironically, hardly anyone noticed at the time.

變化發生得無聲無息, 難以察覺

unless you knew exactly what to look for.

On that morning, U.S. President Bill Clinton

將一特殊開關裝進全球定位系統的衛星

in the orbiting satellites of the Global Positioning System.

轉眼間, 地球上所有的GPS導航器

Instantaneously, every civilian GPS receiver

定位誤差值都從 一個足球場大小

around the globe went from errors the size of a football field

It's hard to overstate the effect that this change

Before this switch was thrown, we didn't have

能夠準確告知我們 該在哪裡轉彎的行車導航系統

in-car navigation systems giving turn-by-turn

directions, because back then, GPS couldn't tell you

都無法精準定位 更何況是在哪條街上

what block you were on, let alone what street.

對於地理定位科技來說 精準度至關重要

and things have only improved over the last 10 years.

With more base stations, more ground stations,

接收器及演算能力在質、量上的不斷突破

GPS現在不但能告訴我們在哪條街上

GPS can now not only tell you what street you are on,

在座各位很多今天應該就是靠著

In fact, many of you navigated here today

TomTom衛星導航或是智慧型手機 來到這裡的

with the help of your TomTom or your smartphone.

But we now stand on the verge of another revolution

地理定位科技精準度革新的轉捩點

假如我說, 目前手機和TomTom衛星導航

What if I told you that the two-meter positioning

提供的定位功能 就算可以把誤差減到兩公尺內

that our current cell phones and our TomToms give us

和未來定位科技一比卻不過雕蟲小技 你會怎麼說?

is pathetic compared to what we could be getting?

For some time now, it's been known that if you pay attention

精準度便可從以公尺為誤差單位

then you can go from meter level to centimeter level,

縮小至以公分, 甚至毫米為單位

那我們的手機 為何還不具備這樣的功能呢?

So why don't we have this capability on our phones?

Only, I believe, for a lack of imagination.

Manufacturers haven't built this carrier phase technique

because they're not sure what the general public would do

當人們面對精準到 足以標出手上皺紋的地理位置定位時

with geolocation so accurate that you could pinpoint

不過, 你、我以及其他創新發明家

我們看得見 這種精準定位的潛力

we can see the potential in this next leap in accuracy.

想像有一個擴增實境的應用軟體

Imagine, for example, an augmented reality app

that overlays a virtual world to millimeter-level precision

將一個虛擬世界 重疊到物質世界之上

I could build for you a structure up here in 3D,

誤差範圍在幾毫米之內的3D建築物

millimeter accurate, that only you could see,

而且只有你或者是在我家的朋友看得見

這種程度的定位, 才是我們要的

So this level of positioning, this is what we're looking for,

and I believe that, within the next few years, I predict,

這種極端精準, 以載波相位為基礎的定位模式

that this kind of hyper-precise, carrier phase-based positioning

帶來的影響也會令人眼睛為之一亮

最終目標, 不用說 是GPS進化成圓點般的大小

The Holy Grail, of course, is the GPS dot.

Do you remember the movie "The Da Vinci Code?"

Here's Professor Langdon examining a GPS dot,

同伴告訴他, 這顆豆, 是個追蹤裝置

which his accomplice tells him is a tracking device

誤差在兩呎內, 範圍涵蓋世界各個角落

accurate within two feet anywhere on the globe,

but we know that in the world of nonfiction,

另一方面, 裝置還沒有做得那麼小

and for another, they don't make devices quite this small,

especially when those devices have to relay

嗯, 這些駁斥在前幾年非常合理

Well, these objections were perfectly reasonable

a few years ago, but things have changed.

There's been a strong trend toward miniaturization,

better sensitivity, so much so that, a few years ago,

a GPS tracking device looked like this clunky box

就像這串鑰匙左邊沉重的黑盒子

Compare that with the device released just months ago

that's now packaged into something the size of a key fob,

and if you take a look at the state of the art

for a complete GPS receiver, which is only a centimeter

you realize that the GPS dot will soon move

若大量普及使用GPS「豆」 世界會是什麼樣子?

Imagine what we could do with a world full of GPS dots.

It's not just that you'll never lose your wallet or your keys

anymore, or your child when you're at Disneyland.

你可以只花幾十塊 就買到一大堆GPS「豆」

You'll buy GPS dots in bulk, and you'll stick them on

everything you own worth more than a few tens of dollars.

I couldn't find my shoes one recent morning,

一如往常, 我還得問我老婆有沒有看到它們

and, as usual, had to ask my wife if she had seen them.

但我實在不該 拿這種芝麻蒜皮的小事叨擾她

But I shouldn't have to bother my wife with that kind of triviality.

I should be able to ask my house where my shoes are.

那些轉而使用Gmail的人應該記得

Those of you who have made the switch to Gmail,

remember how refreshing it was to go from

現在只需點選搜尋功能, 就能輕易找到 多麼令人耳目一新

organizing all of your email to simply searching it.

GPS「豆」對我們的物品 有異曲同工之妙的影響

The GPS dot will do the same for our possessions.

Now, of course, there is a flip side to the GPS dot.

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【TED】託德-漢弗萊斯：如何騙過GPS（Todd Humphreys: How to fool a GPS) (【TED】Todd Humphreys: How to fool a GPS (Todd Humphreys: How to fool a GPS))

position

imagine

switch

temptation