The minimum spanning tree problem in the phase calibration for the spatialFFT interferometer

Authors
Takeuchi, H Akamine, Y Fujii, F Kuniyoshi, M Suemitsu, T Gotoh, K Mizuki, S Mizuno, K Suzuki, T Fukuoka, K Tanaka, N Daishido, T
Citation
H. Takeuchi et al., The minimum spanning tree problem in the phase calibration for the spatialFFT interferometer, PUB AST S J, 52(2), 2000, pp. 267-273
Citations number
6
Categorie Soggetti
Space Sciences
Journal title
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
ISSN journal
00046264 → ACNP
Volume
52
Issue
2
Year of publication
2000
Pages
267 - 273
Database
ISI
SICI code
0004-6264(2000)52:2<267:TMSTPI>2.0.ZU;2-7
Abstract
Achieving a Nyquist-rate direct-imaging observation using a spatial FFT int erferometer, instrumental phase errors in transmission lines must be calibr ated before the observation. We improved the phase-calibrating system in th e Waseda FFT interferometer by increasing the number of simultaneous obtain able fringe baselines from 84 to 128, and using the algorithm of the minimu m spanning tree problem in graph theory. As a result, the main-beam intensi ty of the interferometer became 1.6 times on average.