Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Radio Astronomy in Hawaii


SINCE early 1953, observations of cosmic static have been made at an altitude of 10,020 ft. from the top of Haleakala volcano on the island of Maui in the Hawaiian archipelago near lat. 20° N. A Lloyd's mirror technique is used with frequencies near 20, 30, 50 and 100 Mc./s. The anomalies introduced by the ionosphere at the first three frequencies are so great that most of the results are unintelligible. At 100 Mc./s. the situation is sufficiently simple to be partly understood. Sources with discontinuities of surface brightness small compared to a minute of arc produce rapid interference patterns. Smooth sources of larger angular width produce much slower diffraction patterns. The hours of darkness provide the best results. During the day, radiations from the sun stir up the topmost parts of the atmosphere far above the F-layer. This situation manifests itself as great absorption, probably due to scattering, especially during the afternoon hours. Thus there is a marked diurnal effect. This diurnal effect is least on far northern sources and increases rapidly in magnitude and duration as sources of lower declination are observed. Obviously, there is also an azimuth effect.

Your institute does not have access to this article

Access options

Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Author information

Authors and Affiliations


Rights and permissions

Reprints and Permissions

About this article

Cite this article

REBER, G. Radio Astronomy in Hawaii. Nature 175, 78–79 (1955).

Download citation

  • Issue Date:

  • DOI:


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing