The minimum spanning tree problem in the phase calibration for the spatial FFT interferometer

Hiroshi Takeuchi, Yukinori Akamine, Fumiyuki Fujii, Masaya Kuniyoshi, Taisei Suemitsu, Kentaro Gotoh, Saori Mizuki, Keiju Mizuno, Tomoya Suzuki, Kohji Fukuoka, Naoki Tanaka, Tsuneaki Daishido

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    Achieving a Nyquist-rate direct-imaging observation using a spatial FFT interferometer, instrumental phase errors in transmission lines must be calibrated before the observation. We improved the phase-calibrating system in the Waseda FFT interferometer by increasing the number of simultaneous obtainable fringe baselines from 84 to 128, and using the algorithm of the minimum spanning tree problem in graph theory. As a result, the main-beam intensity of the interferometer became 1.6 times on average.

    Original languageEnglish
    Pages (from-to)267-273
    Number of pages7
    JournalPublications of the Astronomical Society of Japan
    Volume52
    Issue number2
    Publication statusPublished - 2000

    Keywords

    • Graph theory
    • Instrumentation: interferometers
    • Methods: data analysis
    • Surveys

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Fingerprint Dive into the research topics of 'The minimum spanning tree problem in the phase calibration for the spatial FFT interferometer'. Together they form a unique fingerprint.

    Cite this