liaolc wrote:
現行的GPS晶片已經開始有雙模(GPS+Galileo)的產品出現了，未來就看那個應用軟體好用，代工廠可以很容易轉換使用介面，這會是這幾年PND產品的走向。...(恕刪)
我倒不認為是PND這幾年的走向, 第一, Galileo完整上線服務少說要10年, 消費者拿到的只是一個泡泡. 第二, 價位能夠與現有機種相近嗎? 雙模是未來的趨勢但不是現在!
some information about Galileo:
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Galileo Facing Delays; Higher Costs
Published by Roger Hart under SatNav (Non U.S. GNSS)
E urope’s Galileo satellite navigation system is bogged down by internal disputes and delays and will Galileo likely be more expensive and launch years later than its stakeholders have been led to expect. That’s according to a critical analysis by Rob Coppinger in FlightGlobal magazine .
Among the potential problems Mr. Coppinger notes:
* There are questions about using Arianespace’s EADS Astrium Ariane 5 rocket. Suggestions have bee made that 13 Samara Space Centre Soyuz 2-1b boosters would also be needed, which may extend length of time needed to get the entire constellation into orbit.
* The European Commission previously announced it would sign Galileo procurement contracts the first quarter of this year. Now contract awards are to begin from the third quarter of this year.
* Astrium CEO Evert Dudok told the magazine that splitting the contract for the initial 26 Galileo satellites among two competitors could add up to 40% more to the cost of each one as economies of scale would be lost.
* Also there are questions being raised about the availability of rockets to put all the satellites into orbit.
gendoh wrote:
some info...(恕刪)
伽俐略衛星計劃延遲的消息大概在年初時就有相關的消息出來了，主要還是財務困難所致，另外就是原本中國也是伽俐略的主要投資者，後來演變成中國有意退出自己籌設有全球定位功能的北斗二代，而且北斗計劃發射衛星的進度竟然還超前伽俐略，看樣子伽俐略是被中國擺了一道。
有一連串各類GNSS系統的最新動態:
Number of Working GLONASS Satellites Now at 17
Indian Satellite Navigation System Operational in Three Years
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