教師資料查詢 | 類別: 期刊論文 | 教師: 劉國欽 LIOU GUO CHIN (瀏覽個人網頁)

標題:Platform Deformation Phase Correction for the AMiBA-13 Coplanar Interferometer
學年101
學期2
出版(發表)日期2013/05/20
作品名稱Platform Deformation Phase Correction for the AMiBA-13 Coplanar Interferometer
作品名稱(其他語言)
著者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
單位淡江大學物理學系
出版者Philadelphia: Institute of Physics Publishing, Inc.
著錄名稱、卷期、頁數The Astrophysical Journal 769:71 (12 pages)
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.
關鍵字instrumentation;interferometers
語言英文(美國)
ISSN1538-4357
期刊性質國外
收錄於SCI;
產學合作
通訊作者Liao, Yu-Wei; Wu, Jiun-Huei Proty
審稿制度
國別美國
公開徵稿
出版型式,電子版,紙本
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