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Science 29 September 1967:
Vol. 157. no. 3796, pp. 1550 - 1552
DOI: 10.1126/science.157.3796.1550
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Articles

Mercury: Observations of the 3.4-Millimeter Radio Emission

E. E. Epstein 1, S. L. Soter 1, J. P. Oliver 1, R. A. Schorn 2, and W. J. Wilson 3

1 Aerospace Corporation, El Segundo, California
2 Jet Propulsion Laboratory, Pasadena, California
3 Space Systems Division, U.S. Air Force, Los Angeles Air Force Station, Los Angeles, California

Observations of the 3.4-millimeter radio emission from Mercury during 1965 and 1966 yielded the following relationship between average brightness temperature TB of the disk and the planetocentric phase angle i: TB = 277 (± 12) + 97 (± 17) cos [i + 29 deg (± 10 deg)] °K The errors are statistical standard; the phase shift corresponds to a phase lag—that is, the maximum and minimum of insolation lag the maximum and minimum of planetary radiation.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)