Mercury: Observations of the 3.4-Millimeter Radio Emission

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Science  29 Sep 1967:
Vol. 157, Issue 3796, pp. 1550-1552
DOI: 10.1126/science.157.3796.1550


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.