期刊論文
| 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 | en_US |
| ISSN | 1538-4357 |
| 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 | 是 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/96124 ) |