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  • Title: Io's thermal emission from the Galileo photopolarimeter-radiometer.
    Author: Spencer JR, Rathbun JA, Travis LD, Tamppari LK, Barnard L, Martin TZ, McEwen AS.
    Journal: Science; 2000 May 19; 288(5469):1198-201. PubMed ID: 10817987.
    Abstract:
    Galileo's photopolarimeter-radiometer instrument mapped Io's thermal emission during the I24, I25, and I27 flybys with a spatial resolution of 2.2 to 300 kilometers. Mapping of Loki in I24 shows uniform temperatures for most of Loki Patera and high temperatures in the southwest corner, probably resulting from an eruption that began 1 month before the observation. Most of Loki Patera was resurfaced before I27. Pele's caldera floor has a low temperature of 160 kelvin, whereas flows at Pillan and Zamama have temperatures of up to 200 kelvin. Global maps of nighttime temperatures provide a means for estimating global heat flow.
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