Neptune's Wind Speeds Obtained by Tracking Clouds in Voyager Images

@article{Hammel1989NeptunesWS,
  title={Neptune's Wind Speeds Obtained by Tracking Clouds in Voyager Images},
  author={Heidi B. Hammel and Reta Beebe and Eric M. De Jong and Carl J. Hansen and Corey Howell and Andrew P. Ingersoll and Torrence V. Johnson and Sanjay S. Limaye and Julio A. Magalhāes and James B. Pollack and Lawrence A. Sromovsky and Verner E. Suomi and Catherine E. Swift},
  journal={Science},
  year={1989},
  volume={245},
  pages={1367 - 1369}
}
Images of Neptune obtained by the narrow-angle camera of the Voyager 2 spacecraft reveal large-scale cloud features that persist for several months or longer. The features' periods of rotation about the planetary axis range from 15.8 to 18.4 hours. The atmosphere equatorward of -53� rotates with periods longer than the 16.05-hour period deduced from Voyager's planetary radio astronomy experiment (presumably the planet's internal rotation period). The wind speeds computed with respect to this… 
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