淡江大學機構典藏:Item 987654321/96124
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 62822/95882 (66%)
造訪人次 : 4015641      線上人數 : 541
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧：
  • 您可在西文檢索詞彙前後加上"雙引號"，以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋，建議至進階搜尋限定作者欄位，可獲得較完整資料
    •  進階搜尋


    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/96124


    題名: Platform Deformation Phase Correction for the AMiBA-13 Coplanar Interferometer
    作者: Liao, Yu-Wei;Lin, Kai-Yang;Huang, Yau-De;Wu, Jiun-Huei Proty;Ho, Paul T. P.;Chen, Ming-Tang;Huang, Chih-Wei Locutus;Patrick M. Koch;Hiroaki Nishioka;Cheng, Tai-An;Fu, Szu-Yuan;Liu, Guo-Chin;Sandor M. Molnar;Keiichi Umetsu;Fu-Cheng Wang;Chang, Yu-Yen;Han, Chih-Chiang;Li,Chao-Te;Pierre Martin-Cocher;Peter Oshiro
    貢獻者: 淡江大學物理學系
    關鍵詞: instrumentation;interferometers
    日期: 2013-05-06
    上傳時間: 2014-03-03 11:53:51 (UTC+8)
    出版者: Institute of Physics Publishing, Inc.
    摘要: We present a new way to solve the platform deformation problem of coplanar interferometers. The platform of a coplanar interferometer can be deformed due to driving forces and gravity. A deformed platform will induce extra components into the geometric delay of each baseline and change the phases of observed visibilities. The reconstructed images will also be diluted due to the errors of the phases. The platform deformations of The Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) were modeled based on photogrammetry data with about 20 mount pointing positions. We then used the differential optical pointing error between two optical telescopes to fit the model parameters in the entire horizontal coordinate space. With the platform deformation model, we can predict the errors of the geometric phase delays due to platform deformation with a given azimuth and elevation of the targets and calibrators. After correcting the phases of the radio point sources in the AMiBA interferometric data, we recover 50%-70% flux loss due to phase errors. This allows us to restore more than 90% of a source flux. The method outlined in this work is not only applicable to the correction of deformation for other coplanar telescopes but also to single-dish telescopes with deformation problems. This work also forms the basis of the upcoming science results of AMiBA-13.
    關聯: The Astrophysical Journal 769:71 (12 pages)
    DOI: 10.1088/0004-637X/769/1/71
    顯示於類別:[物理學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    0004-637X_769_1_71.pdf1919KbAdobe PDF301檢視/開啟
    index.html0KbHTML67檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋