Aug 8, 2012 - (Ls 153.0, MY 31) to [ongoing]
DAN was contributed by the Federal Space Agency of Russia. Igor Mitrofanov (IKI) leads the team. DAN is a pulsing neutron generator that can detect water content in the soil and resolve water and ice beneath the surface. It can operate in active/passive modes to measure the abundance and depth distribution of H- and OH-bearing materials (e.g., adsorbed water, hydrated minerals) in a shallow layer (~1 m) of Mars' subsurface.
The DAN instrument is used during rover traverses and while the rover is parked. Short-duration (< 2 min) measurements provided a rough estimate of the water-equivalent hydrogen distribution with an accuracy of ~1% by weight. Longer-duration (~30 min) measurements are necessary to derive the vertical distribution of water-equivalent hydrogen with an accuracy of 0.1-0.3% by weight.
During periods of traverse one hour of passive DAN measurements are taken at intervals along the traverse. DAN acquires active measurements during the approach and at the new location.
(You will be redirected to the DAN archive housed at PDS' Geosciences Node located at Washington University in St. Louis, MO)
CITATION_DESC = Harshman, K. and Mitrofanov, I , msl-m-dan-3_4-rdr-v1, NASA Planetary Data System, 2008.
CITATION_DESC = Harshman, K. and Mitrofanov, I , msl-m-dan-2-edr-v1, NASA Planetary Data System, 2008.