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The very long baseline array.

K I Kellermann, A R Thompson

    Science (New York, N.Y.)
    |July 12, 1985
    PubMed
    Summary
    This summary is machine-generated.

    The Very Long Baseline Array (VLBA) uses ten radio telescopes across the US to create highly detailed images of space. This advanced radio telescope system achieves unprecedented angular resolution for astronomical observations.

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    Area of Science:

    • Radio Astronomy
    • Astrophysics
    • Telescope Technology

    Background:

    • The Very Long Baseline Array (VLBA) is a global network of radio telescopes.
    • High-resolution imaging of celestial radio sources is crucial for understanding astrophysical phenomena.

    Purpose of the Study:

    • To describe the capabilities and configuration of the Very Long Baseline Array (VLBA).
    • To highlight the technological advancements enabling unprecedented angular resolution in radio astronomy.

    Main Methods:

    • Utilizes ten 25-meter diameter antennas distributed across the United States.
    • Incorporates low-noise receivers covering 330 MHz to 43 GHz.
    • Employs broadband digital tape recorders for data acquisition.
    • Features a dedicated digital correlator for simultaneous data processing.

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  • Applies Fourier transformation to reconstruct celestial radio source images.

    • Main Results:

    • Achieves an angular resolution better than one thousandth of an arc second.
    • Enables the creation of highly detailed images of cosmic radio sources.

    Conclusions:

    • The VLBA represents a significant advancement in radio astronomy instrumentation.
    • Its high-resolution imaging capabilities will drive new discoveries in astrophysics.