The AMiBA hexapod telescope mount

Patrick M. Koch, Michael Kesteven, Hiroaki Nishioka, Homin Jiang, Kai Yang Lin, Keiichi Umetsu, Yau De Huang, Philippe Raffin, Ke Jung Chen, Fabiola Ibãez-Romano, Guillaume Chereau, Chih Wei Locutus Huang, Ming Tang Chen, Paul T.P. Ho, Konrad Pausch, Klaus Willmeroth, Pablo Altamirano, Chia Hao Chang, Shu Hao Chang, Su Wei ChangChih Chiang Han, Derek Kubo, Chao Te Li, Yu Wei Liao, Guo Chin Liu, Pierre Martin-Cocher, Peter Oshiro, Fu Cheng Wang, Ta Shun Wei, Jiun Huei Proty Wu, Mark Birkinshaw, Tzihong Chiueh, Katy Lancaster, Kwok Yung Lo, Robert N. Martin, Sandor M. Molnar, Ferdinand Patt, Bob Romeo

Research output: Contribution to journalArticle (Academic Journal)

33 Citations (Scopus)

Abstract

The Array for Microwave Background Anisotropy (AMiBA) is the largest hexapod astronomical telescope in current operation. We present a description of this novel hexapod mount with its main mechanical components - the support cone, universal joints, jack screws, and platform - and outline the control system with the pointing model and the operating modes that are supported. The AMiBA hexapod mount performance is verified based on optical pointing tests and platform photogrammetry measurements. The photogrammetry results show that the deformations in the inner part of the platform are less than 120 μm rms. This is negligible for optical pointing corrections, radio alignment, and radio phase errors for the currently operational seven-element compact configuration. The optical pointing error in azimuth and elevation is successively reduced by a series of corrections to about 0 4 rms which meets our goal for the seven-element target specifications.

Original languageEnglish
Pages (from-to)1670-1684
Number of pages15
JournalAstrophysical Journal
Volume694
Issue number2
DOIs
Publication statusPublished - 1 Jan 2009

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