DAN - Dynamic Albedo of Neutrons
                                          Aug 8, 2012 - (Ls 153.0, MY 31) to [ongoing]

    Dynamic Albedo of Neutrons (DAN)

    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.

    Useful Mission Documents and Tools
    Description of the Data

    DAN Archive (You will be redirected to the DAN archive housed at PDS' Geosciences Node located at Washington University in St. Louis, MO)

    Citing Data Sets for Publications
    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.