NASA Finds Cause of Voyager 2 Glitch
Analysis by Irene Klotz
Tue May 18, 2010 12:29 PM ET
What a difference a bit makes. NASA engineers believe they have traced the cause of Voyager 2's gibberish to single flip of bit in the spacecraft’s memory.
少少嘢做到多麼大的變化，美國宇航局的工程師相信，他們已追查到原因，導致旅行者2號的胡言亂語，翻轉一點太空船的記憶。
"A value in a single memory location was changed from a 0 to a 1," said JPL’s Veronia McGregor.
“在單一記億位置的一個價值，由a 0被改變為 a 1，”噴氣推進實驗室的貝羅尼亞麥格雷戈說。
畫廊：可能的任務：頂級5架探索者太空船
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Voyager 2 left Earth on Aug. 20, 1977 to explore Jupiter and Saturn. It successfully finished that mission, then flew by Uranus and Neptune before heading into interstellar space.
It is currently traveling through heliopause -- a region of space where the sun's influence ebbs and interstellar forces begin to dominate.
Voyager 2 and its twin, Voyager 1, are both expected to enter interstellar space -- the first human-made objects to do so -- in the next five years.
Earlier this month, engineers suspended Voyager 2's science measurements because of an unexpected problem in its communications stream. A glitch in the flight data system, which formats information for radioing to Earth, was believed to be the problem. Engineers were able to replicate the glitch in a computer lab, showing that a single bit flip was responsible. NASA plans to reset Voyager's memory tomorrow.
The spacecraft is so far away it takes nearly 13 hours for a radio signal from Earth, traveling at the speed of light, to reach it, and another 13 hours to receive a response.
http://news.discovery.com/space/nasa-finds-cause-of-voyager-glitch.html
美太空船傳回怪碼 惹被外星人劫持猜測
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