Mariner 1969: Preliminary Results of the Infrared Radiometer Experiment

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Science  03 Oct 1969:
Vol. 166, Issue 3901, pp. 98-99
DOI: 10.1126/science.166.3901.98


The thermal energy emitted by Mars was measured in the 8- to 12- and 18- to 25-micrometer bands. The minimum temperature derived for the southern polar cap is 150°K, an indication that the cap is formed by frozen carbon dioxide. No significant temperature fluctuations were detected with a 100-kilometer scale.

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