Winds at the Mars Phoenix landing site

Mathematics – Logic

Scientific paper

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Scientific paper

The Telltale is a mechanical anemometer consisting of a lightweight cylinder suspended by Kevlar fibers that are deflected under the action of wind. The Telltale is mounted on top of the meteorological (MET) mast at roughly 2 meters height above the surface [1]. Images taken with the Surface Stereo Imager (SSI) of the Telltale deflection allows the local wind speed and direction to be quantified at the Phoenix landing site. In course of the mission, more than 6000 Telltale observations were made, that allowed for gaining a detailed picture of the wind regime at the landing site. This allows us to assess the accuracy of predictions from global climate models, slope wind effects, midnight temperature turbulence, daily temperature differences and possible temperature inversion arising from frost formation. [1] H. P. Gunnlaugsson et al., (2008), J. Geophys. Res., 113, E00A04,

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