This graph presents simplified data from overnight measurements by the
Thermal and Electrical Conductivity Probe on NASA's Phoenix Mars Lander
from noon of the mission's 70th Martian day, or sol, to noon the following
sol (Aug. 5 to Aug. 6, 2008).
The graph shows that water disappeared from the atmosphere overnight, at
the same time that electrical measurements detected changes consistent
with addition of water to the soil.
Water in soil appears to increase overnight, when water in the atmosphere
disappears.
The Phoenix Mission is led by the University of Arizona, Tucson, on behalf
of NASA. Project management of the mission is by NASA's Jet Propulsion
Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin
Space Systems, Denver.
