English  |  正體中文  |  简体中文  |  Items with full text/Total items : 76531/76531 (100%)
Visitors : 29751336      Online Users : 281
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/2160

    Title: 衛星星系於氣象觀測之設計與研究;The design and research of constellation in weather observation
    Authors: 張根榮;Ken-jung Chang
    Contributors: 機械工程研究所
    Keywords: 軌道;衛星星系;衛星;orbit;constellation;satellite
    Date: 2002-06-04
    Issue Date: 2009-09-21 11:39:45 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 由於臺灣處於颱風路徑上,因此颱風常對台灣造成災害,而目前我國各氣象單位能接收到只有GMS系列衛星的氣象資料。我們希望在每個小時之內,有衛星通過會受颱風影響的區域上空,以執行氣象觀測任務,提供詳細之颱風位置、大小、移動方向等氣象資料。 本文在根據任務需求,分析衛星之任務特性,決定了衛星軌道類型為高度為八百公里、傾角為98.6度的太陽同步軌道;並由地球、CCD與衛星之幾何關係,計算及決定真實水平面及有效水平面;透過衛星軌道與地面軌跡的計算,及衛星星系的假設分析,統計計算出不同衛星星系通過有效水平面之平均間隙及最大間隙,並比較其覆赫觸v。而根據模擬的結果,要符合任務需求所須最少的衛星數目為16個及最佳的衛星星系分佈為16/16/2的Walker衛星星系模式,各衛星升交點經度差為22.5度,而相臨軌道衛星間之幅角差為45度。 Taiwan is always on the pass way of typhoon, so typhoon always act natural disaster to Taiwan. Our weather station can only receive weather message from the GMS series satellite. We hope at least one satellite pass through Taiwan in an hour to execute weather observation mission, and provide more detail about typhoon. Based on the mission demand, we analysis the characteristics of mission, decide the orbit type is sun-synchronous orbit with orbit height is 800 km and orbit inclination is 98.6 deg. According to the calculation of orbit and orbit tracking, geometry between satellite and Earth, and assumption of several types of constellation, we can gather statistics of time of satellite pass through effective horizon. Then we can get the maximum gap and mean gap of different constellation, and analysis the efficiency of coverage. The final submission, we can use 16 satellites with 16/16/2 walker constellation to accomplish our mission.
    Appears in Collections:[機械工程研究所] 博碩士論文

    Files in This Item:

    File SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明