Io's thermal emission from the Galileo photopolarimeter-radiometer

Galileo's photopolarimeter-radiometer instrument mapped to's thermal emissi on during the 124, 125, and 127 flybys with a spatial resolution of 2.2 to 300 kilometers. Mapping of Loki in 124 shows uniform temperatures for most of Loki Patera and high temperatures in the southwest corner, probably resu lting from an eruption that began 1 month before the observation. Most of L oki Patera was resurfaced before 127. Pele's caldera floor has a low temper ature of 160 kelvin, whereas flows at Pillan and Zamama have temperatures o f up to 200 kelvin, Global maps of nighttime temperatures provide a means f or estimating global heat flow.